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Electrical Engineering Objective Questions { Electrical And Electronic Measurement }

43. AC bridges have
A. leakage error and eddy current errors only
B. residual errors, frequency errors and waveform errors only
C. both (a) and (b) above
D. no error

44. Induction type single phase energymeter is
A. an ampere-hour meter
B. true watt-hour meter
C. wattmeter
D. none of these

45. Two-wattmeter method can be used to measure the total power delivered to
A. star connected load only
B. delta connected load only
C. star as well as delta connected loads
D. star connected with neutral load

46. LVDT
A. converts linear motion into electrical signal
B. translates electrical signal into linear motion
C. helps measuring temperature
D. can be used to sense angular displacement

47. Piezo-electric quartz crystal can be used to measure
A. temperature
B. velocity
C. acceleration
D. flow

48. Dummy strain gauge in used to
A. increase the efficiency
B. increase the range
C. compensate for temperature changes
D. make the bridge self balancing

49. CRO helps in measuring the following values of an ac voltage
A. rms value only
B. peak value only
C. average value only
D. all the above three

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