1. Hysteresis of an instrument means:
a) The change in the same reading when input is first increased and then decreased
b) The reliability of the instrument
c) The repeatability of the insrument
d) The inaccuracy due to change in temperature
2. In which part of the scale does the pointer indicate more accurately
a) In the first third of the cycle
b) In the first half of the cycle
c) In about middle of the scale
d) In the last third of the cycle
3. For measuring an unknown electrical quantity, select the meter with
a) Highest range and work down
b) Lowest range and work up
c) Middle range and can be work up or down depending
d) Any of the above
4. The ratio of maximum displacement deviation to the full scale deviation of the instrument is called:
a) Static sensitivity
b) Accuracy
c) Linearity
d) Precision
5. A 150 V moving iron voltmeter of accuracy class 1.0 reads 75 V when used in a circuit under a standard conditions. The maximum possible percentage error in the reading is:
a) 0.5
b) 1.0
c) 2.0
d) 4.0
6. The relative error is the:
a) Difference of the measured value and the true value
b) Ratio of absolute error to the measured value of the quantity under measurement
c) Ratio of the absolute error to the true value of the quantity under measurement
d) Ratio of the probable error to the true value of the quantity under measurment
7. The moving iron voltmeters are likely:
a) To indicate the same value of the ac as on dc
b) To indicate higher value of ac than on dc
c) To indicate lower value of ac than on dc
d) The moving iron instruments should not be used for dc measurment
8. The power measurement in a balanced 3-phase circuit can be done by:
a) One wattmeter method
b) Two wattmeter method
c) Three wattmeter method
d) Any of the above method
9. Anderson's bridge is a modification of:
a) Maxwell's wien bridge
b) Hay's bridge
c) Schering bridge
d) Owen bridge
10. Ballastic tests are used in magnetic measurements for the determination of:
a) Flux density of the specimen
b) B-H curve of the specimen
c) Hysteresis loop of the specimen
d) All the above
a) The change in the same reading when input is first increased and then decreased
b) The reliability of the instrument
c) The repeatability of the insrument
d) The inaccuracy due to change in temperature
2. In which part of the scale does the pointer indicate more accurately
a) In the first third of the cycle
b) In the first half of the cycle
c) In about middle of the scale
d) In the last third of the cycle
3. For measuring an unknown electrical quantity, select the meter with
a) Highest range and work down
b) Lowest range and work up
c) Middle range and can be work up or down depending
d) Any of the above
4. The ratio of maximum displacement deviation to the full scale deviation of the instrument is called:
a) Static sensitivity
b) Accuracy
c) Linearity
d) Precision
5. A 150 V moving iron voltmeter of accuracy class 1.0 reads 75 V when used in a circuit under a standard conditions. The maximum possible percentage error in the reading is:
a) 0.5
b) 1.0
c) 2.0
d) 4.0
6. The relative error is the:
a) Difference of the measured value and the true value
b) Ratio of absolute error to the measured value of the quantity under measurement
c) Ratio of the absolute error to the true value of the quantity under measurement
d) Ratio of the probable error to the true value of the quantity under measurment
7. The moving iron voltmeters are likely:
a) To indicate the same value of the ac as on dc
b) To indicate higher value of ac than on dc
c) To indicate lower value of ac than on dc
d) The moving iron instruments should not be used for dc measurment
8. The power measurement in a balanced 3-phase circuit can be done by:
a) One wattmeter method
b) Two wattmeter method
c) Three wattmeter method
d) Any of the above method
9. Anderson's bridge is a modification of:
a) Maxwell's wien bridge
b) Hay's bridge
c) Schering bridge
d) Owen bridge
10. Ballastic tests are used in magnetic measurements for the determination of:
a) Flux density of the specimen
b) B-H curve of the specimen
c) Hysteresis loop of the specimen
d) All the above
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