Fundamental of Electrical Measurements - Multiple Choice Questions and Answers

Fundamental of Electrical Measurements - Multiple Choice Questions and Answers Points : Fundamental of Electrical Measurements, Electrical, MCQS, Objective type question, Multiple choice questions and answer Select the correct answers of the following items:

1. Measurement may be done by....
a. Direct method
b. Indirect method
c. Both (a) & (b)
d. None of above

2. A Tangent Galvanometer is a type of...
a. Secondary instrument
b. Absolute instrument
c. Recording instrument
d. Digital instrument

3. Voltmeters, Ammeters, Wattmeters are....
a. Indicating instruments
b. Integrating instruments
c. Recording instruments
d. All of above

4. Energy Meter is the type of....
a. Display instrument
b. Indicating instrument
C. Integrating instrument
d. None of above

5. Hall Effect is utilized by
a. Frequency meter
b. Voltmeter
c. Ohmmeter
d. Flux meter

6. When a current carrying coil is brought near a permanent magnet, there will be either....
a. Force of attraction
b. Force of repulsion
c. None of above
d. Both (a) & (b)

7. High voltage measurement can be performed by...
a. Electrostatic voltmeter
b. Bridge method
c. Ordinary voltmeter
d. All of above

8. Chemical effect is utilized by......
a. Ammeter
h. Voltmeter
c. D.C. Ampere hour meter
d. A.C. Ampere hour meter

9. The force required to move pointer from zero is called.
a. Controlling force
b. Operating force
c. Damping force
d. All of above

10. Operating torque can be produced by
a. Spring
h. Gravity
c. Balance weight
d. None of above

11. When the force causing the instrument to deflect is removed, the pointer comes hack to zero under......
a. Controlling force
b. Damping force
c. Operating force
d. All of above

12. When deflecting and controlling forces are produced, the moving system can not immediately settle at its final position due to...
a. Gravity
b. Inertia
c. Velocity
d. None of above

13. Meters using gravity control have
a. Uniform scale
b. Non uniform scale
c. Cramped scale
d. Both (h) & (c)

14. Most suitable material for spring in instrument is......
a. Silver
b. Silicon bronze
c. Phosphor bronze
d. Platinum

17. When the moving system moves in a lethargic fashion, the instrument is said to be....
a. Underdamped
b. Critically damped
c. Dead beat
d. Overdamped

18. The performance of the instrument can be judged by
a. High Torque/Weight ratio
b. Low Torque/Weigh t ratio
c. Zero Torque/Weight ratio
d. One of above

19. Permanent magnets are artificially aged by
a. Placing in a weak are magnetic field
h. Placing in a strong are magnetic field
c. Heating
d. Both (a) & (b)

20. In all cases the weight and inertia of the pointers must be.
a. High
b. Low
c. Both (a) & (b)
d. All of above

21. Light spot indicating arrangement is used as pointer because....
a. It is mass less
b. It is inertia free
c. Both (a) & (b)
d. None of above

22. If the pointer and scale are in different planes, the reading error is called....
a. Parallax error
b. System errors
c. Pointer errors
d. None of above

23. The PMMC instruments have uniform scale, which can be extended over an arc of…
a 90°
b. 120°
c. 180°
d. 27°

24. The instruments which obey the square law, their scale is........
a. Non-uniform
h. Uniform
c. Even
d. All of above

25. Except low resistance instruments & millimetres, the springs are made of
a. Silicon Bronze
h. Hard-Rolled Silver
c. Phosphor Bronze
d. All of above

26. The cross section of the helix spring is.
a. Round
b. Square
c. Rectangular
d. All of above

27. When steel covers are used, the moving system of the instrument should be mounted in a position as far away from the case as possible in order to avoid....
a. Hysteresis error
b. Eddy current error
c. Both (a) & (b)
d. None of above

28. Bearing is an element of an instrument or a machine which supports the...
a. Moving system
b. Spindle
c. Shaft
d. All of above

29. Chemically sapphire material is.....
a. Aluminium oxide
b. Copper oxide
c. Silicon oxide
d. Silver oxide

30. While manufacturing glass for bearing, is definitely used.
a. Boron
b. Phosphorus
c. Silicon oxide
d. Metal oxide

31. The purpose of lubrication of bearing is.
a. To reduce friction
h. To reduce wear
c. Cool the surfaces
d. All of above

32. Mostly is used as a lubricant......
a. Vegetable oil
b. Mineral oil
c. Animal oil
d. Solid lubricant

33. When force-feed and Banjo Lubricators are used for lubrication purpose, the system is called.....
a. Pressure feed system
b. Gravity system
c. Mechanical system
d. None of above

34. Tangent Galvanometer is the type of
a. Secondary instrument
b. Absolute instrument
c. Recording instrument
d. Indicating instrument

35. Tangent Galvanometer is also called...
a. Moving coil instrument
b. Moving magnet instrument
c. Moving conductor instrument
d. None of above

36. Tangent Galvanometer is applicable for measurement of.....
a. Current
b. Earth magnetic horizontal component (H)
c. For calibration of secondary instruments
d. All of above

37. Plays a vital role in recording instruments....
a. Current
b. Voltage
c. Transducer
d. Amplifier

38. Are the recording surfaces of a recorder...?
a. Disc chart
b. Burn chart
c. Strip chart
d. All of above

39. The chart in recording instruments is driven by.
a. Fixed speed motor
b. Variable speed motor
c. Induction motor
d. All of above

40. Recording instrument requires....
a. Low damping
b. Extra damping
c. Zero damping
d. All of above