Electric Circuit and Electron Device–10 marks (Part B) Questions with Answers

Anna University

Electric Circuit and Electron Device


Subject Code : EC2151

Subject Name : Electric Circuit and Electron Device

Year : 1st yr

Semester : 2nd Sem

Department : CSE & ECE


Important 10 MARKS (Part B) Questions with Answers


1. DETERMINE THE EQUIVALENT RESISTANCE BETWEEN TERMINALS A & B

1

2

2. Find the mesh currents in the following network

clip_image049

Solution:

clip_image052

The solution of -1 amp for I2 means that our initially assumed direction of current was incorrect. In actuality, I2 is flowing in a counter-clockwise direction at a value of (positive) 1 amp:

clip_image053


3. Explain the working of a moving iron type instruments.

These instruments are widely used in laboratories and switch board at commercial frequencies because these are cheaper in cost, robust in construction and can be manufactured with required accuracy.

These are generally of two types:-

1. The attraction type.

2. The repulsion type.

The attraction type instrument operate on the principle of attraction of a single piece of soft iron into a magnetic field and repulsion type instrument operate on the principle of repulsion of two adjacent iron pieces magnified by the same magnetic field. Repulsion type instrument are more sensitive than attraction type instrument as in repulsion type instrument large separating torque is developed by having two iron element positional class together inside the field coil where the magnetizing effect is maximum.

In both type of these instruments, the current under measurement is passed through a coil of wire. This current carrying coil set up the necessary field depending on the magnitude of the current to be measured. The coil may be of a few turns of very heavy conductor or of many turns of fine wire. The instrument to be used as an ammeter is provided with a

coil of few turns of thick wire in order to have low resistance and carry large current and that to be used as a voltameter is provided with a coil of large number of turns of wire in order to have high resistance and draw as small current as possible.


4. Derive the expression for torque produced in moving iron instrument.

Let L be the self inductance corresponding to a total angular deflection of q radians and change in inductance be dL correponding to small change in deflection angel dq due to small change in current.

The change in energy of magnetic field,

dw = Td dθ

Since change in energy dE = workdone, dw

Td dθ = ½ I2dL Td = ½ I2dL/dθ

where I is in amperes, L is in Henry and θ is in Radians.

Thus toruqe is proportional to the square of the instrument current and to the rate of change of inductance with deflection.


5. An energy meter revolves 10 revolutions of disc for unit of energy. Find the number of revolutions made by it during an hour when connected across when connected 20A at 210V and 0.8 power factor leading. If energy meter revolves 350 revolutions, find the % error.

Answer.

Energy consumed in one hour = VI cos φ / 1000

= 210 x 20 x 0.8 / 1000

= 3.360 kwh.

The number of revolution the meter should make it is correct = 3.360 x

registration const in revolution per kwh

= 3.360 x 100

= 336

Number of revolution actually made = 350

% error = (350-336) x 100 / 350

% error = 0.1466 %


6. Explain how following torque are produced in pmmc instrument and attracted type moving iron instruments

1. Deflecting torque

2. Control torque

3. Damping torque

1. DEFLECTING TORQUE:- The deflecting torque is produced by making use of one of the magnetic, chemical, electrostatic and electromagnetic induction effects of current or voltage and causes the moving system of the instrument to move from its zero position when the instrument is connected in an electrical circuit to measure the electrical quantity. The method of producing this torque depend upon the type of instrument. In attracting the type of instrument, this torque to equal to

Td = 1/2 I2 dL/dθ

Whereas in Pmmc instruments

Td = Bilur

Where B - magnetic density i - current flowing

l - length of coil

u - number of turn r - radius of coil

2. CONTROLLING TORQUE:- The magnitude of the movement to the moving system would be somewhat indefinite under the influence of deflecting torque unless some controlling torque exist. This torque opposes

the deflecting torque and increases with increase in deflection of the moving system without controlling system the irrespective magnitude of current and moreover, once deflected it would not return to its zero position on removing the current.

In attraction type instrument it is produced by spring control and in PMMC

too it would be produced by spring control.

3. DAMPING TORQUE:- This torque is also necessary to avoid oscillation of the moving system about it's final deflected position owing to the inertia of the moving parts and to bring the moving system to rest in it's final deflected

position quickly.

clip_image054


7. Briefly discuss the construction and working of a PMMC instrument.

How range is extended in moving coil ammeter and voltmeter?

Answer.

CONSTRUCTION:- In a permanent magnet with soft iron pole pieces, a cylindrical iron core is mounted between the two poles of the magnet giving very narrow air gap in which the sides of a pointted light rectangular coil lies. The rectangular coil is wound of many turns of coil. The purpose of using

core is to make the field uniform and to reduce the reluctance of the magnetic circuit. A low reluctance helps to retain permeance of magnet for a longer period.

WORKING OF TORQUE EQUATION:- When the current to be measured is passed through the coil, say in the direction as shown in fig. (a), deflecting torque is produced. On account of relation between permanent magnetic field and coil magnetic field, the direction of deflecting torque can be determined by applying Fleming's left hand rule.

It is the current in amperes flowing through the coil of turns N and length l meters B is flux density in test as in air gap:-

Then, deflecting force F = BilN newtons.

If r is the distance in meters in between the centers of the coil and force F.

Then deflecting torque Td = F x r = BilNr Nm

From the above expression it is obvious that if flux density B in the air gap is constant, then

deflecting torque Td = i , Tc= Td

So, θ = i

And since q is directly proportional to current, the scale of the basic dc PMMC instrument are usually linearly spaced. Hence scale is linear.

clip_image055


8. Discuss the construction and working of an electrodynamic wattmeter with the help of diagram?

Answer.

This type of instrument is similar in design and principle to the dynanometer type ammeter and voltameter.

WORKING AND CONSTRUCTION:- When the instrument of this type is used as wattmeter, the fixed coil which is divided into two equal portions in order to provide them uniform field , is employed as current coil and moving coil is used as pressure coil. The fixed coil which is divided into two equal portion in order to provide them uniform field, is employed as current coil and the moving coil is used as pressure coil, i.e the fixed coil carries the current proportional to the voltage across the circuit. A high non inductive resistance

is connected in series with the moving coil in order to limit current. The magnetic field of the fixed and moving coil react on one another causing the moving coil to turn about it's axis. The movement is controlled by hair springs which also leads the current into and out of the moving element. Damping is provided by light aluminium moving in an air dash pot. The pointer is fixed to the moving coil spindle and moves over a suitable caliberated scale.

THEORY:- Let us be the supply voltage, i the load current and R the load resistance of the moving coil circuit.

Current through fixed coil, if = i

Current through moving coil, im = V/R

deflecting torque, Td ∝ if im ∝ V/R

For a DC circuit the deflecting torque is thus proportional to the power and for any circuit with fluctuating torque. The instantaneous to the instantaneous power.

clip_image056


9. Compare merits and demerits of moving iron type instruments and dynamometer type instruments. Which one is superior why?

Answer.

1. TORQUE HEIGHT RATIO:- Dynamometer type instruments have equal small torque height ratio.

2. FRICTION ERROR:- Dynamometer type instruments have considerable friction error.

3. FRICTION LOSS:- Owing to heavy moving system, dynamometer type instruments have more friction losses.

4. COST AND SENSITIVITY TO OVERLOAD:- As a result of measures to reduce the frictional error, the dynamometer type instruments are more sensitive to overloads and mechanical impactsis in comparison to moving iron type instruments.

5. SENSTIVITY:- The senstivity of dynamometer instrument is typically very poor due to poor deflecting torque.

6. POWER CONSUMPTION:- Dynamometer type instrument have comparatively higher power consumption.

7. EFFECT OF STRAY MAGNETIC FIELD:- There is no effect of stray magnetic field on moving iron type while dynamometer type are most sensitive towards it.

8. HYSTERISIS AND EDDY CURRENT ERRORS:- Dynamometer type instruments are free from these erors while moving iron have these errors.

9. EFFECT OF WAVE FORM:- Dynamometer type instruments are very useful for accurate measurement of runs voltage while frequency change serious e rrors in AC measurement in moving iron type instruments.

10. CALIBRATION:- Dynamometer type instruments have same calibration for AC and DC measurements while moving iron type have a difference between AC and DC calibration.


10. Why shunt is usually used voltmeter and ammeter? A moving coil instrument has a resistance of 5 Ω and gives full deflection of 100mv. Show how the instrument may be used to measure:-

1. voltage upto 50V

2. current upto 10A

Answer.

Shunt is usually used in voltmeter and ammeter to extend the range of voltmeter and ammeters.

Rm = 5Ω

Vm = 100mv

Im = Vm/Rm = 100mv/5Ω = 20mA

1. For measuring voltage upto 50V.

Series resistance is used with the instrument whose resistance is

R = V/Im - Rm = 50/(20 x 10-3) - 5

R = 2.5 x 10-3 - 5 = R = 2495 Ω

2. Such resistance of resistance Rf is used to be connected

Rf = Rm/[I/Im - 1]

= 5/[10/20 x 10-3 -1] = 5 x 2/998

Rf = 0.01002004 Ω


11. Explain the principle of operation of attraction type moving iron instruments and explain how the controlling and damping forces are obtained?

Answer. The earliest and simplest form of attraction moving iron instruments uses a solenoid and moving oval shaped soft iron pinoted eccentrically. To

this iron a pointer is attached so that it may deflect along with the moving iron over a graduate scale. The iron is made of sheet metal specially shaped to give a scale as nearby uniform as possible. The moving iron is drawn into field of solenoid when current flows through it. The movement of the iron always

from weaker magnetic field outside the coil into the stronger field inside the coil regardless the direction of flow of current. When the current to be measured is passed through the solenoid, a magnetic field is set up inside the solenoid, which in turn magnetises the iron. Thus the iron is attached into the coil causing the spindle and the pointer to rotate.

So much instruments normally have spring control and pneumatic damping forces.

clip_image058


12. 3-φ 4 pole induction motor is supplied from 3φ 50Hz ac supply. Find

(1) synchronous speed

(2) rotor speed when slip is 4%

(3) the rotor frequency when runs at 600r.p.m.

Sulution

1) Ns =120f/p

=120*50/4

= 1500 r.p.m.

2) speed when slip is 4% or .04

N=Ns (1-s)

=1500(1-0.04)

= 1440 r.p.m.

3) slip when motor runs at 600 r.p.m.

S’=(Ns –N)/Ns

=(1500-600)/1500

= 0.6


13. Explain the method of temperature control in open loop and closed loop systems.

Temperature controllers are needed in any situation requiring a given temperature be kept stable. This can be in a situation where an object is required to be heated, cooled or both and to remain at the target temperature (set point), regardless of the changing environment around it. There are two fundamental types of temperature control; open loop and closed loop control. Open loop is the most basic form and applies continuous heating/cooling with no regard for the actual temperature output. It is analogous to the internal heating system in a car. On a cold day, you may need to turn the heat on to full to warm the car to 75°. However, during warmer weather, the same setting would leave the inside of the car much warmer than the desired 75°.

clip_image059

Open loop control block diagram

Closed loop control is far more sophisticated than open loop. In a closed loop application, the output temperature is constantly measured and adjusted to maintain a constant output at the desired temperature. Closed loop control is always conscious of the output signal and will feed this back into the control process. Closed loop control is analogous to a car with internal climate control. If you set the car temperature to 75°, the climate control will automatically adjust the heating (during cold days) or cooling (during warm days) as required to maintain the target temperature of 75°.

clip_image060

Closed loop control block diagram

A temperature controller is a device used to hold a desired temperature at a specified value. The simplest example of a temperature controller is a common thermostat found in homes. For instance, a hot water heater uses a thermostat to control the temperature of the water and maintain it at a certain commanded temperature. Temperature controllers are also used in ovens. When a temperature is set for an oven, a controller monitors the actual temperature inside of the oven. If it falls below the set temperature, it sends a signal to activate the heater to raise the temperature back to the set point. Thermostats are also used in refrigerators. So if the temperature gets too high, a controller initiates an action to bring the temperature down.


14. Explain about open loop and closed loop control system.

clip_image061

Figure 1 shows an open loop system. A computed force is applied to the system which is expected to respond based on the specifications. If the system fails to respond correctly (because your estimates were off) or an unanticipated disturbance acted on it, then there is no way to correct the course. On the other hand, figure 2 shows a feed-back system. The response C(s) is measured using the sensor H(s) and the resultant is compared with the input R(s). The resultant difference (error) is acted upon by the controller which works on the actuator. The actuator then applies the required force on the system.

The closed loop thus contains the sensor dynamics, the controller dynamics, the actuator dynamics in addition to the system we are interested in. It should be noted that all measurements have to be done or converted if necessary into one unit so that comparison with the target signal is possible. Usually, measurements result in currents and voltages. Hence, this conversion from a mechanical input to an electrical output is also included in the sensor, controller and actuator dynamics.

In designing the full control system the dynamics of all the components need to be accounted for. If the controller is very slow compared to the system, it will not send the right input at the right time. In this class, we will assume perfect sensor and actuator dynamics, i.e., what goes into the sensor (it is commonly denoted by H(s)) and the actuator comes out unmodified instantaneously. So we replace them with unity transfer functions.


15. Explain the relation between voltage, current and resistance

An electric circuit is formed when a conductive path is created to allow free electrons to continuously move. This continuous movement of free electrons through the conductors of a circuit is called a current, and it is often referred to in terms of "flow," just like the flow of a liquid through a hollow pipe.

The force motivating electrons to "flow" in a circuit is called voltage. Voltage is a specific measure of potential energy that is always relative between two points. When we speak of a certain amount of voltage being present in a circuit, we are referring to the measurement of how much potential energy exists to move electrons from one particular point in that circuit to another particular point. Without reference to two particular points, the term "voltage" has no meaning.

Free electrons tend to move through conductors with some degree of friction, or opposition to motion. This opposition to motion is more properly called resistance. The amount of current in a circuit depends on the amount of voltage available to motivate the electrons, and also the amount of resistance in the circuit to oppose electron flow. Just like voltage, resistance is a quantity

relative between two points. For this reason, the quantities of voltage and resistance are often stated as being "between" or "across" two points in a circuit.

To be able to make meaningful statements about these quantities in circuits, we need to be able to describe their quantities in the same way that we might quantify mass, temperature, volume, length, or any other kind of physical quantity. For mass we might use the units of "kilogram" or "gram." For temperature we might use degrees Fahrenheit or degrees Celsius. Here are the

standard units of measurement for electrical current, voltage, and resistance:

clip_image062


16. Explain the construction of DC machine with neat diagram.

A D.C. machine consists mainly of two part the stationary part called stator and the rotating part called stator.

The stator consists of main poles used to produce magnetic flux ,commutating poles or interpoles in between the main poles to avoid sparking at the commutator but in the case of small machines sometimes the interpoles are avoided and finally the frame or yoke which forms the supporting structure of the machine.

The rotor consist of an armature a cylindrical metallic body or core with slots in it to place armature windings or bars, a commutator and brush gears

The magnetic flux path in a motor or generator is show below and it is called the magnetic structure of generator or motor.

clip_image063

Cross sectional view of a DC Machine

Frame

Frame is the stationary part of a machine on which the main poles and commutator poles are bolted and it forms the supporting structure by connecting the frame to the bed plate. The ring shaped body portion of the frame which makes the

magnetic path for the magnetic fluxes from the main poles and interpoles is called Yoke.

Yoke

In early days Yoke was made up of cast iron but now it is replaced by cast steel.

This is because cast iron is saturated by a flux density of 0.8 Wb/sq.m where as saturation with cast iron steel is about 1.5 Wb/sq.m.So for the same magnetic flux density the cross section area needed for cast steel is less than cast iron hence the weight of the machine too. If we use cast iron there may be chances of blow holes in it while casting. so now rolled steels are developed and these have consistent magnetic and mechanical properties.

End Shields or Bearings

If the armature diameter does not exceed 35 to 45 cm then in addition to poles end shields or frame head with bearing are attached to the frame. If the armature diameter is greater than 1m pedestral type bearings are mounted on the machine bed plate outside the frame. These bearings could be ball or roller type but generally plain pedestral bearings are employed. If the diameter of the armature is large a brush holder yoke is generally fixed to the frame.


17.Explain the Working of dynamometer type wattmeter

The principle of operation of the electrodynamometer-type wattmeter is the same as that for dynamo-electric machines. The deflection torque is produced by the interaction of two magnetic fluxes. One of the fluxes is produced by a fixed coil which carries a current proportional to the load current and therefore called the current coil. The other flux is created by a movable coil which carries a current proportional to the load voltage and thus called the voltage or potential coil. A high non-inductive resistance is connected to the potential coil so that its current is almost in phase with the load voltage. The control torque is provided by a control spring.

In a dynamometer type wattmeter the fixed coil (current coil) is connected in series with the load.This coil is divided in to two parts and they are kept parallel to each other. The coil is thick in cross section and has less number of turns.The moving coil (pressure coil) is connected across the load. It is thin in cross - section and has hundreds of turns. It has a non - inductive high resistance in series with it

clip_image065

The wattmeter is an electrodynamic instrument for measuring the electric power or the supply rate of electrical energy of any given circuit. The device consists of a pair of fixed coils, known as current coils, and a movable coil known as the potential coil. The current coils are connected in series with the circuit, while the potential coil is connected in parallel. Also, on analog wattmeters, the potential coil carries a needle that moves over a scale to indicate the measurement. A current flowing through the current coil generates an electromagnetic field around the coil. The strength of this field is proportional to the line current and in phase with it. The potential coil has, as a general rule, a high-value resistor connected in series with it to reduce the current that flows through it. The result of this arrangement is that on a dc circuit, the deflection of the needle is proportional to both the current and the voltage, thus conforming to the equation W=VA or P=EI. On an ac circuit the deflection is proportional to the average instantaneous product of voltage and current, thus measuring true power, and possibly (depending on load characteristics) showing a different reading to that obtained by simply multiplying the readings showing on a stand-alone voltmeter and a stand-alone ammeter in the same circuit. The two circuits of a wattmeter are likely to be damaged by excessive

current. The ammeter and voltmeter are both vulnerable to overheating - in case of an overload, their pointers will be driven off scale - but in the wattmeter, either or even both the current and potential circuits can overheat without the pointer approaching the end of the scale! This is because the position of the pointer depends on the power factor, voltage and current. Thus, a circuit with a low power factor will give a low reading on the wattmeter, even when both of its circuits are loaded to the maximum safety limit. Therefore, a wattmeter is rated not only in watts, but also in volts and amperes.


18. Explain the construction of transformer with neat diagram.

A transformer is an electrical device used to convert AC power at a certain voltage level to AC power at a different voltage, but at the same frequency.

The construction of a transformer includes a ferromagnetic core around which multiple coils, or windings, of wire are wrapped. The input line connects to the 'primary' coil, while the output lines connect to 'secondary' coils. The alternating current in the primary coil induces an alternating magnetic flux that 'flows' around the ferromagnetic core, changing direction during each electrical cycle. The alternating flux in the core in turn induces an alternating current in each of the secondary coils. The voltage at each of the secondary coils is directly related to the primary voltage by the turns ratio, or the number of turns in the primary coil divided by the number turns in the secondary coil. For instance, if the primary coil consists of 100 turns and carries 480 volts and a secondary coil consists of 25 turns, the secondary voltage is then: secondary voltage = (480 volts) * (25/100) = 120 volts

Two coils of wire (called windings) are wound on some type of core material. In some cases the coils of wire are wound on a cylindrical or rectangular cardboard form. In effect, the core material is air and the transformer is called an AIR-CORE TRANSFORMER. Transformers used at low frequencies, such as 50 hertz and 400 hertz, require a core of low-reluctance magnetic material, usually iron. This type of transformer is called an IRON-CORE TRANSFORMER. Most power transformers are of the iron- core type. The principle parts of a transformer and their functions are:

• The CORE, which provides a path for the magnetic lines of flux.

• The PRIMARY WINDING, which receives energy from the ac source.

• The SECONDARY WINDING, which receives energy from the primary winding and delivers it to the load.

• The ENCLOSURE, which protects the above components from dirt, moisture, and mechanical damage.

clip_image067

A soft-iron-core transformer is very useful where the transformer must be physically small, yet efficient. The iron-core transformer provides better power transfer than does the air-core transformer. A transformer whose core is constructed of laminated sheets of steel dissipates heat readily; thus it provides for the efficient transfer of power. The majority of transformers you will encounter in Navy equipment contain laminated- steel cores. These steel laminations are insulated with a non conducting material, such as varnish, and then formed into a core. It takes about 50 such laminations to make a core an inch thick. The purpose of the laminations is to reduce certain losses.


74 comments:

  1. If somebody wants expert take on the main topic of blogging next I advise him/her to go to this site, continue the fussy job.
    Braun Series 7 Shaver review

    ReplyDelete
  2. It was wondering if I could use this write-up on my other website, I will link it back to your website though.Great Thanks. Razor for Men

    ReplyDelete
  3. I was so excited to finally be able to purchase my instant pot for my birthday but was disappointed when it came. The first thing I noticed when I opened the lid was that it smelled like it had been used and the inner pot had water spots instant pot 6 quart

    ReplyDelete
  4. Pretty good post. I just stumbled upon your blog and wanted to say that I have really enjoyed reading your blog posts. Any way I'll be subscribing to your feed and I hope you post again soon. Big thanks for the useful info. fit tire electric bike

    ReplyDelete
  5. Pretty good post. I just stumbled upon your blog and wanted to say that I have really enjoyed reading your blog posts. Any way I'll be subscribing to your feed and I hope you post again soon. Big thanks for the useful info. my guide on RGB fans

    ReplyDelete
  6. Hi to everybody, here everyone is sharing such knowledge, so it’s fastidious to see this site, and I used to visit this blog daily high voltage doorknob capacitors

    ReplyDelete
  7. Hi to everybody, here everyone is sharing such knowledge, so it’s fastidious to see this site, and I used to visit this blog daily high voltage diode

    ReplyDelete
  8. I see the greatest contents on your blog and I extremely love reading them. high voltage resistor

    ReplyDelete
  9. Superior post, keep up with this exceptional work. It's nice to know that this topic is being also covered on this web site so cheers for taking the time to discuss this! Thanks again and again! mosfet replacement

    ReplyDelete

  10. Awesome article, it was exceptionally helpful! I simply began in this and I'm becoming more acquainted with it better! Cheers, keep doing awesome!
    edi diodes

    ReplyDelete
  11. Yes, I am entirely agreed with this article, and I just want say that this article is very helpful and enlightening. I also have some precious piece of concerned info !!!!!!Thanks. kids quads

    ReplyDelete
  12. Since eBay took the internet by storm in the late 1990s, people have been using it to make money. By simply using the basic business concept of buying at a low price and selling at a higher one in order to make profit, people around the world have made millions on the auction giant's website. Even today, it is still quite possible for people to get a piece of the pie and start an eBay based business. That being said, one of the best items to sell are electronics. Because we live in a world where electronics are constantly within reach, the popularity of these items won't go anywhere, anytime soon. So how do you start an eBay business selling mixed electronics? Easy... buy liquidation pallets. telstra conduit

    ReplyDelete
  13. The source of the best online slot games It comes in the form of famous anime from Japan such as One Piece, Naruto.PG Slot

    ReplyDelete
  14. Kaun Banega Crorepati Head office number, now you can feel free to call.Kbc check online lottery

    ReplyDelete
  15. Repair in UAE provides 24/7 emergency services related to property maintenance services covering plumbing,appliances.Candy Service center

    ReplyDelete
  16. The latest coronavirus would be the infection-inducing real estate agent using the viral sickness that has been a global pandemic, and possesses stimulated the global economic slowdown. Often called crew change in Chattogram port this complaint has endangered people well being in massive-scale and pressured the authorities across the world to pick the long-term lockdown to kick its sequence of progression. Your circumstance when using the COVID-19 is reminding on the crises who had happened during the time of Business Conflict 2, in step with the UN Assistant-All round.

    ReplyDelete
  17. The latest coronavirus would be the infection-inducing real estate agent using the viral sickness that has been a global pandemic, and possesses stimulated the global economic slowdown. Often calledtoupee

    ReplyDelete
  18. An Indoors Medical attention doctor unquestionably a doctor who financial savings specifically utilizing the verdict, treatments plan and deterrence of health threats in fully developed anyone and nonsurgical health problems in grown up grown-ups. Medical doctors of In just Remedies are on top of that named internists. internal medicine katy

    ReplyDelete
  19. Making a choice on control over your medical is a must regardless how past you actually are. Essentially the most recommended remedies you will obtain is purchasing a fantastic Imperative medical care exclusive healthcare professional. The primary healthcare exclusive healthcare professional is with the forefront lines and wrinkles for a health-related and is a variation anywhere between having at your earliest convenience mediation, postponed discovery or misdiagnosis. For that reason, there are still really important questions or concerns have a look at in Primary care physician katyhealthcare professional.

    ReplyDelete
  20. Most importantly, we work hard to finish each project on time and under budget. In Houston, we have open and candid communications with our Home additions

    ReplyDelete
  21. The post is written in very a good manner and it contains many useful information for me. 먹튀사이트

    ReplyDelete
  22. From annual checkups and sports physicals to screenings, we can meet all your physician’s needs.primary care physician sugar Land

    ReplyDelete
  23. We strive to maintain affordable pricing for your baby pup. Our nannies are ready to bring your puppy to their forever home.nanny for dogs

    ReplyDelete
  24. We strive to maintain affordable pricing for your baby pup. Our nannies are ready to bring your puppy to their forever home nanny for dogs

    ReplyDelete
  25. You can get custom packaging boxes with logo here. Our company makes packaging with good material at wholesale prices. If you order more than 50 pounds, our company give you free shipping for all over the world.CBD Boxes

    ReplyDelete
  26. It proved to be Very helpful to me and I am sure to all the commentators here! 오피

    ReplyDelete
  27. No more waiting time for a logo. Just share your logo vision with us either by email or phone call. Allow our team to do research with business nature, appropriate color, and font, etc, to revert with custom logo concepts within a couple of hours.

    logo designer in queens

    ReplyDelete
  28. You can get custom packaging boxes with logo here. Our company makes packaging with good material at wholesale prices. If you order more than 50 pounds, our company give you free shipping for all over the world.Soap boxes

    ReplyDelete
  29. I can see that you are an expert at your field! I am launching a website soon, and your information will be very useful for me.. Thanks for all your help and wishing you all the success in your business. 먹튀검증

    ReplyDelete
  30. KBC Lottery number check 2022 KBC Lottery number check 2022

    kbc lottery winner 2021 list whatsapp kbc lottery winner 2021 list whatsapp number

    ReplyDelete
  31. https://kfanhub.com/hot-finally-revealed-park-bo-young-park-hyung-sik-are-dating-in-2021

    ReplyDelete
  32. The piece of mind in knowing the repair was done in a safe, proper manner is well worth the cost. Moreover, trying to do it yourself can lead to more costly repair bills. I've lost track of the amount of times I've had to spend an hour or more on what should have been a fifteen minute job. 維修熱水爐

    ReplyDelete
  33. Revitalizing my faith is what brought me on this beautiful journey. I felt disconnected and slipping, spiritually.Eid Decorations

    ReplyDelete
  34. What a great and tremendous blog post

    https://kbcinquiryoffice.blogspot.com/2021/10/kbc-head-office-number-mumbai-kbc.html

    ReplyDelete
  35. I am so much impressed with your assessment.

    https://bolgameshowluckydraw.blogspot.com/2021/09/bol-news-head-office-number-2021.html

    ReplyDelete
  36. I am getting good benefits from your blog.

    https://kbcluckywinner4.blogspot.com/p/kbc-online-check-whatsapp-lottery.html?m=1

    ReplyDelete
  37. What a great and tremendous blog and article.

    https://kbcwhatsappheadofficenumber.blogspot.com

    ReplyDelete
  38. PCB Assembly refers to the attaching of electronic components to a printed circuit board. PCBs are used to mechanically connect and support electronic components using conductive pathways, traces or tracks which are etched from copper sheets laminated onto a non-conductive substrate. PCBA board

    ReplyDelete
  39. Tahir Termite control service is one of the prime termite control companies in Lahore.Termite Chemicals in Lahore

    ReplyDelete
  40. National Eye Center has been providing both indoor and outdoor eye care facilities to patients since 2004 at Sanda Road Lahore. refractive surgery in lahore

    ReplyDelete
  41. Asia99th online gambling website The strongest source right now, safe, stable.เว็บตรง

    ReplyDelete
  42. PG SLOT is considered one of the best. online slot games That has been very popular PGSLOT from people all over the world that has it all. pgslot

    ReplyDelete
  43. UFABET is open to everyone 24 hours a day, depositing-withdrawing within 1 minute with an automatic system AUTO on the website.UFABET

    ReplyDelete
  44. We are really grateful for your blog post. You will find a lot of approaches after visiting your post. I was exactly searching for. Thanks for such post and please keep it up. Great work. best lowering springs for 2019 mustang gt

    ReplyDelete
  45. The HCPL provide outstanding business consulting services through team work.Real Estate

    ReplyDelete
  46. Positive site, where did u come up with the information on this posting?I have read a few of the articles on your website now, and I really like your style. Thanks a million and please keep up the effective work. high voltage ceramic capacitors

    ReplyDelete
  47. ShareEcard is the Global Leader in Digital Business Cards.Design own Digital Card

    ReplyDelete
  48. Your site is truly cool and this is an extraordinary moving article. Printed Circuit Board

    ReplyDelete
  49. Wow! Such an amazing and helpful post this is. I really really love it. It's so good and so awesome. I am just amazed. I hope that you continue to do your work like this in the future also Satta king fast

    ReplyDelete
  50. page and would like you to keep updated on news. And upload current articles for us to read continuously For thorough tracking pg slot

    ReplyDelete
  51. Any carpet would start to look dirty over time. Dirt is carried into the room and thus onto the carpet by your shoes and socks, and also by the feet of household pets. You should realize that when an HVAC system is used, dust is dispersed throughout the house and eventually settles on the carpet. cleaning companies in abu dhabi UAE

    ReplyDelete
  52. Some homeowners prefer not to hire professional carpet cleaners, believing they are not getting the best value for their money. But that’s not entirely true. Cleaners are hired because they can do the job of cleaning carpets most efficiently and quickly because they have the necessary tools and products solely for the job. rug cleaning services in Dubai


    ReplyDelete
  53. Welcome to some other sensational Indian lottery redirects. The lottery is held twice a month. There is no one-time viewing limit for fans, viewers can watch twice a month without any hassle and you can talk to the KBC head office number. kbc office Number 2023

    ReplyDelete
  54. National Eye Center has been providing both indoor and outdoor eye care facilities to patients since 2004 at Sanda Road Lahore. For the last decade, services of experienced eye surgeons of different eye procedures & nursing staff have been made available.Glaucoma Treatment in Lahore

    ReplyDelete
  55. If we talk about this reality show, it is a game show. In this show, a game of knowledge is played. Questions related to general knowledge are asked and the one to answer quickly gets to enter the finals. Contestants in finals get to win cash rewards with every correct answer in a given time.kbc office Number 2023

    ReplyDelete
  56. Despite the presence of an absolutely free free trial, you certainly will need to subscribe to the services ultimately. Stop suppliers supplying the information free of charge whatsoever when they may not be reliable. You should also never be fooled to spend sizeable sums for that subscription frequently, regardless. legit crypto airdrops

    ReplyDelete
  57. Achilles Tendinitis – Achilles Tendinitis is brought about by dull or severe strain on the Achilles ligament – the band of tissue that interfaces your lower leg muscles to your heel bone. ankle sprain icd 10

    ReplyDelete
  58. The first point to establish is the training and experience of a particular cleaning company. Only contract the services of a skilled carpet cleaning company that has already completed a very rigorous training program covering everything related to carpet cleaning, including the different techniques used, the type of cleaning solution, and the best course of action. Carpet cleaning services in my area

    ReplyDelete
  59. The Florida Gulf Coast University comes under one of the top-ranking universities in Southwest Florida. The university offers graduate and undergraduate programs for the students.fgcu canvas

    ReplyDelete
  60. Thalassemia is a blood disorder. It causes less hemoglobin than usual in the human body. Hemoglobin is a crucial particle of red blood cells that helps to carry oxygen. Besides, thalassemia may cause severe anemia.icd 10 anemia

    ReplyDelete
  61. Cleaning rugs in the home is not a recommended practice, especially for high quality oriental rugs made only from silk or wool. Some wool-blend rugs and cotton rugs can be cleaned at home, but only after checking the manufacturer’s instructions.Carpet cleaning services in my area

    ReplyDelete
  62. How do you clean your carpet? When you do it yourself, it can be said with Carpet Cleaning Service in UAE certainty that it would be once in a while, not very often and at best with the use of the vacuum cleaner. If you don’t have one, you can sweep the mat or even pull it out and hit it hard with a stick to remove deeply embedded dirt. It can be said that these are not the right or the most effective methods for cleaning carpets. carpet cleaning near me UAE

    ReplyDelete
  63. Shin supports – Shin braces happen because of irritation of the muscles, ligaments, and bone tissue around your tibia (the massive bone in the front of your lower leg). Otherwise called Medial/Anterior tibial pressure disorder, the condition regularly happens in competitors who have increased or changed their preparation schedules. Delicacy, touchiness, or torment along the inner side of your shinbone and gentle growth in your lower leg are the typical manifestations.ankle sprain icd 10

    ReplyDelete
  64. However, his mother Sabrina Jackson died at a very young age, when 50 cents was too young. Curtis’s mother died in a fire accident. Her father left her at that age. He then grew up in southern Jamaica with his grandmother. Despite his adoption by his grandparents, the teenager will follow in his mother’s footsteps by becoming a dealer in turn.how tall is 50 cent

    ReplyDelete
  65. The largest fleet of late model executive and luxury class vehicles in New York. Our fleet is meticulously cared for and maintained with the highest level of cleaning. We also apply a professional cleaning method for all Sedan and SUV. black car service in ny

    ReplyDelete
  66. Welcome to some other sensational Indian lottery redirects. The lottery is held twice a month. There is no one-time viewing limit for fans, viewers can watch twice a month without any hassle and you can talk to the KBC head office number. You can also see the approximate definitions of the lucky draw winners on this factor. Fans are always excited about the lottery game because it is the fastest interest of the miles through which people can move forward. kbc office Number 2023

    ReplyDelete
  67. Hire Luxuxy Sprinter from HAMPTON CHAUFFEUR & AIRPORT TRANSPORTATION SERVICES for best experience. Clients regularly travel to concerts, dinner, weddings, business meetings and the airport. We offer a range of type of vehicles including SUV, Executive Sedan, Luxuxy Sedan, Ultra Luxuxy Sedan. If you want a ride of Sprinter click below button to get quote.wineries in the Hamptons

    ReplyDelete
  68. The same particles that cause allergies in your family can also cause depreciation of your carpet fibers. Dirt, stains, and microscopic materials can get stuck in your carpet and wear down the fibers, especially in high-traffic areas where particles stamp more often. Eventually, those particles will cause visible wear and a distinctive roughness under bare feet, eventually requiring carpet replacement.best carpet cleaner uae

    ReplyDelete
  69. Although the current position of tall 50 Cent is luxurious, his childhood was not happy at all. The journey from Curtis Jackson to 50 cents was not easy for him. He was born in the house of Sabrina Jackson, a notorious drug dealer in Queens. Curtis has been involved in the drug trade since childhood.how tall is 50 cent

    ReplyDelete
  70. Ideally, Oriental rug cleaning should be done at least once every 12 months. If it is used in a high traffic area, it is recommended to clean it once every 6 months. To determine whether the carpet needs cleaning or not, rub your hand over it for about 10 seconds. If you see a lot of dust blowing away or your hands are dirty, your carpet definitely needs to be cleaned. The accumulation of dust on carpets can lead to respiratory diseases. Carpet cleaning services in my area

    ReplyDelete
  71. Most homeowners have been searching for a better way to gain visibility on YouTube. Therefore, it is vital to analyze and completely understand how visibility can be gained on your YouTube channel and what it takes to be successful.buy youtube views

    ReplyDelete
  72. Exposed to COVID-19 or Planning to Travel, need Rapid PCR test in Houston. Auspicious Lab ensures the availability of the PCR test result within the time frame. Covid 19 swept our nation and our world unexpectedly. With that, the need for testing for Covid has since increased.Same Day Covid Test Houston

    ReplyDelete
  73. Internists are regarded as the “doctor’s doctor” because they are specialists in sickness and disease, and many other sorts of highly specialized doctors rely on them for professional guidance and assistance. Internists are often regarded as having great knowledge and competence in identifying and treating illnesses.Internal medicine katy

    ReplyDelete
  74. เพราะเว็บของ pg betflix มีความทันสมัย ดูแลผู้เล่นทุกท่านไม่ว่าจะเป็นผู้เล่นใหม่ หรือ ผู้เล่นเก่า อย่างทั่วถึงไม่ betflix สมัครสมาชิกกับเราเพียงไม่กี่นาที ผู้เล่นสามารถที่จะทดลองเล่นได้ฟรี

    ReplyDelete