Category: Measurement and Instrumentation

A. instrumental errors
B. environmental errors
C. observational errors
D. all of the above

A. extend voltage range
B. measure voltage
C. compare voltage in a box
D. none of the above

A. moving coil instrument
B. moving iron instrument
C. dynamometer instrument
D. none of the above

A. linear
B. non-linear
C. either A. or B.
D. neither A. nor B.

A. deflecting
B. controlling
C. damping
D. any of the above

A. Must be a good insulator
B. Should be non-evaporating
C. Should not have corrosive action upon the metal of the vane
D. The viscosity of the oil should not change with the temperature
E. All of the above

A. D.C. voltmeter
B. Ammeter and a known resistance
C. D.C. potentiometer
D. None of the above

A. necessary to standardise the potentiometer
B. not necessary to standardise the potentiometer
C. necessary to use a volt ratio box in conjunction with the potentiometer
D. none of the above

A. induction ammeter
B. permanent magnet type ammeter
C. electrostatic ammeter
D. moving iron repulsion type voltmeter

A. one voltmeter and one ammeter
B. one voltmeter, one ammeter and one wattmeter
C. one voltmeter, one ammeter and one energy meter
D. any of the above