To measure a resistance with the help of a potentiometer it is_________________?
(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
An ohmmeter is a____________?
(A) moving iron instrument
(B) moving coil instrument
(C) dynamometer instrument
(D) none of the above
Murray loop test can be used for location of________________?
(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
In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load was___________?
(A) unity
(B) 0.8 lagging
(C) 0.8 leading
(D) zero
Which of the following is an essential part of a motor meter ?
(A) An operating torque system
(B) A braking device
(C) Revolution registering device
(D) All of the above
In a low power factor wattmeter the compensating coil is connected_______________?
(A) in series with current coil
(B) in parallel with current coil
(C) in series with pressure coil
(D) in parallel with pressure coil
The multiplier and the meter coil in a voltmeter are in________________?
(A) series
(B) parallel
(C) series-parallel
(D) none of the above
For measuring current at high frequency we should use_______________?
(A) moving iron instrument
(B) electrostatic instrument
(C) thermocouple instrument
(D) none of the above
The pressure coil of a wattmeter should be connected on the supply side of the current coil when______________?
(A) load impedance is high
(B) load impedance is low
(C) supply voltage is low
(D) none of the above
The adjustment of position of shading bands, in an energy meter is done to provide______________?
(A) friction compensation
(B) creep compensation
(C) braking torque
(D) none of the above