Measurement and Instrumentation Questions and Answers | Online Quiz for Practice

46. The desirable static characteristics of a measuring system are

1. accuracy and reproducibility
2. accuracy, sensitivity and reproducibility
3. drift and dead zone
4. static error

47. The disc of an instrument using eddy current damping should be of

1. conducting and magnetic material
2. non-conducting and magnetic material
3. conducting and non-magnetic material
4. none of the above

48. The electrical power to a meggar is provided by

1. battery
2. permanent magnet D.C. generator
3. AC.generator
4. any of the above

49. The function of shunt in an ammeter is to

1. by pass the current
2. increase the sensitivity of the ammeter
3. increase the resistance of ammeter
4. none of the above

50. The gravity controlled instrument has crowded scale because current is proportional to

1. balancing weight
2. deflection angle
3. sine of deflection angle

51. The household energy meter is

1. an indicating instrument
2. a recording instrument
3. an integrating instrument
4. none of the above

52. The multiplier and the meter coil in a voltmeter are in

1. series
2. parallel
3. series-parallel
4. none of the above

53. The operating voltage of a meggar is about

1. 6 V
2. 12 V
3. 40 V
4. 100 V

54. The pointer of an indicating instrument should be

1. very light
2. very heavy
3. either a or b
4. neither a nor b

55. The power factor of a single phase load can be calculated if the instruments available are

1. one voltmeter and one ammeter
2. one voltmeter, one ammetqr and one wattmeter
3. one voltmeter, one ammeter and one energy meter
4. any of the above

56. The power of a n-phase circuit can be measured by using a minimum of

1. (n - 1) wattmeter elements
2. n wattmeter elements
3. (n + 1) wattmeter elements
4. 2n wattmeter elements

57. The pressure coil of a wattmeter should be connected on the supply side of the current coil when

1. load impedance is high
2. load impedance is low
3. supply voltage is low
4. none of the above

58. The principle on which vector voltmeter is based is

1. that it works on the principle of complex variation
2. that it measures the response of linear ramp voltage
3. same as digital meter
4. that it measures the amplitude of a single at two points and at the same time measures their phase difference

59. The ratio of maximum displacement deviation to full scale deviation of the instrument is called

1. static sensitivity
2. dynamic deviation
3. linearity
4. precision or accuracy

60. The rectifier instrument is not free from

1. temperature error
2. wave shape error
3. frequency error
4. all of the above