Electrical Online Test 15

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Attempt Free Electrical Online Test 15 Here. Read The Important Electrical MCQ From Below.

1) in majority of instruments damping is provided by

a. Fluid friction
b. Spring
c. Eddy currents
d. All of the above
Ans. c. Eddy currents

2) Which one do you like?

a. Option 1
b. Option 2
c. Option 3
d. Option 4
Ans. a. Option 1

3) An ammeter is a

a. Secondary instrument
b. Absolute instrument
c. Recording instrument
d. Integrating instrument
Ans. a. Secondary instrument

4) A _____ device prevents the oscillation of the moving system and enables the latter to reach its final position quickly

a. Deflecting
b. Controlling
c. Damping
d. Any of the above
Ans. c. Damping

Electrical Online Test 15

5) In a portable instrument, the controlling torque is provided by

a. Spring
b. Gravity
c. Eddy currents
d. All of the above
Ans. a. Spring

6) An induction meter can handle current up to

a. 10 A
b. 30A
c. 60A
d. 100A
Ans. d. 100A

7) ?????. is the ratio of o/p signal of the instrument to the change of i/p

a. Accuracy
b. Sensitivity
c. error
d. resolution
Ans. b. Sensitivity

8) Which of the following instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured ?

a. Absolute instruments
b. Indicating instruments
c. Recording instruments
d. Integrating instruments
Ans. b. Indicating instruments

Electrical Online Test 15

9) ____ instruments are those which measure the total quantity of electricity delivered in a particular time.

a. Absolute
b. Indicating
c. Recording
d. Integrating
Ans. d. Integrating

10) Which of the following meters are not used on D.C. circuits

a. Mercury motor meters
b. Commutator motor meters
c. Induction meters
d. None of the above
Ans. c. Induction meters

11) ????..is the deviation from the true value of the measured value

a. Accuracy
b. precision
c. error
d. resolution
Ans. c. error

Electrical Online Test 15

12) For handling greater currents induction wattmeters are used in conjunction with

a. Potential transformers
b. Current transformers
c. Power transformers
d. Either of the above
Ans. b. Current transformers

13) Scale of moving coil ammeter is linear and in the moving iron is ——–

a. also linear
b. non linear
c. Vertical
d. none
Ans. b. non linear

14) ??.. Is the smallest change in the measured value to which the instument will respond.

a. Accuracy
b. Sensitivity
c. error
d. Resolution
Ans. a. Accuracy

Electrical Online Test 15

15) The chemical effect of current is used in

a. D.C. ammeter hour meter
b. D.C. ammeter
c. D.C. energy meter
d. None of the above
Ans. a. D.C. ammeter hour meter

16) .Induction type single phase energy meters measure electric energy in

a. KW
b. Wh
c. KWh
d. VAR
Ans. c. KWh

17) ????.is the closeness with which an instrument readily approx the true value

a. accuracy
b. sensitivity
c. error
d. resolution
Ans. a. accuracy

18) An induction type instrument can measure

a. ac current
b. ac power
c. Ac energy
d. All the above
Ans. d. All the above

19) The household energy meter is

a. An indicating instrument
b. A recording instrument
c. An integrating instrument
d. None of the above
Ans. c. An integrating instrument

Electrical Online Test 15

20) An electro dynamic instrument has two fixed coils and —– moving coils

a. one
b. two
c. three
d. None
Ans. a. one

21) Which of the following essential features is possessed by an indicating instrument ?

a. Deflecting device
b. Controlling device
c. Damping device
d. All of the above
Ans. d. All of the above

22) Cost of the moving coil ammeter is ——–than that of moving iron ammeter

a. More
b. Less
c. Same as
d. none
Ans. a. More

Electrical Online Test 15

23) is an instrument which measures the insulation resistance of an electric circuit relative to earth and one another,

a. Tangent galvanometer
b. Meggar
c. Current transformer
d. None of the above
Ans. b. Meggar

24) ????? is a measure of the reproducibility of the measuring instrument for a given fixed value of a variable

a. accuracy
b. Sensitivity
c. precision
d. Resolution
Ans. c. precision

25) Resistances can be measured with the help of

a. Watt-meters
b. Voltmeters
c. Ammeters
d. Ohmmeters and resistance bridges
Ans. d. Ohmmeters and resistance bridges

Electrical Online Test 15