measurement and instrumentation MCQs – Page 3

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

measurement and instrumentation Mcqs
41. According to application, instruments are classified as_____________?
comments icon0

A. switch board

B. portable

C. both A. and B.

D. moving coil

E. moving iron

F. both D. and E.

42. For measuring current at high frequency we should use_______________?
comments icon0

A. moving iron instrument

B. thermocouple instrument

C. electrostatic instrument

D. none of the above

43. A power factor meter has________________?
comments icon0

A. one current circuit and one pressure circuit

B. one current circuit and two pressure circuits

C. two current circuits and one pressure circuit

D. none of the above

44. The two pressure coils of a single phase power factor meter have_________________?
comments icon0

A. the same dimension but different number of turns

B. none of the above

C. the same dimensions and the same number of turns

D. the same number of turns but different dimensions

45. The power factor of a single phase load can be calculated if the instruments available are_____________?
comments icon0

A. one voltmeter and one ammeter

B. one voltmeter, one ammeter and one wattmeter

C. any of the above

D. one voltmeter, one ammeter and one energy meter

46. Two holes in the disc of energy meter are drilled at the opposite sides of the spindle to_____________?
comments icon0
A. eliminate creeping at no load

B. improve its ventilation

C. increase its deflecting torque

D. increase its braking torque

47. Systematic errors are_________________?
comments icon0

A. observational errors

B. instrumental errors

C. all of the above

D. environmental errors

48. The function of shunt in an ammeter is to______________?
comments icon0
A. by pass the current

B. increase the resistance of ammeter

C. increase the sensitivity of the ammeter

D. none of the above

49. To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken_______________?
comments icon0

A. from a battery

B. any of the above

C. from a source which is not the same as the unknown voltage

D. from the same source as the unknown voltage
50. To avoid the effect of stray magnetic field in A.C. bridges we can use_______________?
comments icon0

A. Wagner earthing device

B. magnetic screening

C. any of the above

D. wave filters

51. The operating voltage of a meggar is about_______________?
comments icon0
A. 100 V

B. 12 V

C. 6 V

D. 40 V

52. It is required to measure the true open circuit e.m.f. of a battery. The best device is_____________?
comments icon0

A. D.C. voltmeter

B. None of the above

C. Ammeter and a known resistance

D. D.C. potentiometer
53. In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load was___________?
comments icon0
A. unity

B. zero

C. 0.8 leading

D. 0.8 lagging

54. Which of the following instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured ?
comments icon0

A. Integrating instruments

B. Indicating instruments

C. Absolute instruments

D. Recording instruments

55. In a low power factor wattmeter the pressure coil is connected_______________?
comments icon0

A. to the supply side of the current coil

B. to the load side of the current coil

C. none of the above

D. in any of the two meters at connection

56. To measure radio frequency, the suitable frequency meter is_______________?
comments icon0

A. electrical resonance frequency meter

B. Weston frequency meter

C. reed vibrator frequency meter

D. heterodoxy frequency meter
57. If the current in a capacitor leads the voltage by 80, the loss angle of the capacitor is_________________?
comments icon0
A. 10

B. 80

C. 120

D. 170

58. For measurements on high voltage capacitors, the suitable bridge is_______________?
comments icon0

A. None of the above

B. Any of the above

C. Modified De Santys bridge

D. Schering bridge

E. Wein bridge

59. Murray loop test can be used for location of________________?
comments icon0

A. ground fault on a cable

B. short circuit fault on a cable

C. both the ground fault and the short-circuit fault

D. none of the above

60. Most sensitive galvanometer is_____________?
comments icon0

A. vibration galvanometer

B. Duddlb galvanometer

C. elastic galvanometer

D. spot ballistic galvanometer