measurement and instrumentation MCQs – Page 2

Practise focused measurement and instrumentation questions with marked answers for exam preparation and subject revision.

measurement and instrumentation Mcqs
21. The electrical power to a meggar is provided by________________?
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A. any of the above

B. permanent magnet D.C. generator

C. AC. generator

D. battery

22. A universal RLC bridge uses_________________?
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A. Maxwell bridge configuration for measurement of inductance and De Santas bridge for measurement of capacitance

B. Any of the above

C. Maxwell Wein bridge for measurement of inductance and modified De Santys bridge for measurement of capacitance

D. Maxwell Wein bridge for measurement of inductance and Wein bridge for measurement of capacitance

23. A dynamometer wattmeter can be used for______________?
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A. both D.C. and A.C.

B. D.C. only

C. A.C. only

D. any of the above

24. To measure a resistance with the help of a potentiometer it is_________________?
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A. not necessary to standardise the potentiometer

B. necessary to use a volt ratio box in conjunction with the potentiometer

C. necessary to standardise the potentiometer

D. none of the above

25. In Weston synchronoscope the moving coil is connected across______________?
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A. any of the above

B. fixed coils

C. bus-bars

D. incoming alternator

26. In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of_________________?
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A. 0.5 Hz

B. 0.1 Hz

C. 1.5 Hz

D. 0.25 Hz

27. If an inductance is connected in one arm of bridge and resistances in the remaining three arms____________?
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A. the bridge can be balanced if the resistances have some specific values

B. the bridge cannot be balanced

C. the bridge can always be balanced

28. In a low power factor wattmeter the compensating coil is connected_______________?
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A. in parallel with pressure coil

B. in series with current coil

C. in series with pressure coil

D. in parallel with current coil

29. In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at_____________?
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A. 120

B. 90

C. 60

D. 0

30. In an energy meter braking torque is produced to________________?
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A. bring energy meter to stand still

B. safe guard it against creep

C. maintain steady speed and equal to driving torque

D. brake the instrument

31. The adjustment of position of shading bands, in an energy meter is done to provide______________?
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A. braking torque

B. friction compensation

C. none of the above

D. creep compensation

32. In a portable instrument, the controlling torque is provided by_____________?
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A. spring

B. all of the above

C. gravity

D. eddy currents

33. Which of the following properties a damping oil must possess ?
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A. The viscosity of the oil should not change with the temperature

B. Should be non-evaporating

C. Must be a good insulator

D. Should not have corrosive action upon the metal of the vane

E. All of the above
34. A __________ device prevents the oscillation of the moving system and enables the latter to reach its final position quickly___________?
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A. damping

B. any of the above

C. controlling

D. deflecting

35. A sensitive galvanometer produces large deflection for a_______________?
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A. large value of current

B. none of the above

C. small value of current

D. large value of voltage

E. large value of power

36. An induction meter can handle current up to_____________?
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A. 30 A

B. 10:00 AM

C. 100 A

D. 60 A

37. For handling greater currents induction wattmeters are used in conjunction with______________?
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A. either of the above

B. potential transformers

C. power transformers

D. none of the above

E. current transformers
38. In a meggar controlling torque is provided by______________?
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A. eddy current

B. coil

C. spring

D. gravity

39. In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of___________?
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A. 1.5 Hz

B. 0.25 Hz

C. 0.1 Hz

D. 0.5 Hz
40. The rectifier instrument is not free from_______________?
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A. all of the above

B. wave shape error

C. frequency error

D. temperature error