The chemical effect of current is used in ______________?
A. D.C. ammeter hour meter
B. D.C. ammeter
C. D.C. energy meter
D. none of the above
Measurement and Instrumentation
For handling greater currents induction wattmeters are used in conjunction with______________?
For handling greater currents induction wattmeters are used in conjunction with______________?
A. potential transformers
B. current transformers
C. power transformers
D. either of the above
E. none of the above
is an instrument which measures the insulation resistance of an electric circuit relative to earth and one another_______________?
is an instrument which measures the insulation resistance of an electric circuit relative to earth and one another_______________?
A. Tangent galvanometer
B. Meggar
C. Current transformer
D. None of the above
Induction type single phase energy meters measure electric energy in_______________?
Induction type single phase energy meters measure electric energy in_______________?
A. kW
B. Wh
C. kWh
D. VAR
E. None of the above
A moving-coil permanent-magnet instrument can be used as flux-meter_____________?
A moving-coil permanent-magnet instrument can be used as flux-meter_____________?
A. by using a low resistance shunt
B. by using a high series resistance
C. by eliminating the control springs
D. by making control springs of large moment of inertia
Most common form of A.C. meters met with in every day domestic and industrial installations are______________?
Most common form of A.C. meters met with in every day domestic and industrial installations are______________?
A. mercury motor meters
B. commutator motor meters
C. induction type single phase energy meters
D. all of the above
An induction meter can handle current up to_____________?
An induction meter can handle current up to_____________?
A. 10 A
B. 30 A
C. 60 A
D. 100 A
__________ instruments are those which measure the total quantity of electricity delivered in a particular time ?
__________ instruments are those which measure the total quantity of electricity delivered in a particular time ?
A. Absolute
B. Indicating
C. Recording
D. Integrating
Resistances can be measured with the help of_______________?
Resistances can be measured with the help of_______________?
A. wattmeters
B. voltmeters
C. ammeters
D. ohmmeters and resistance bridges
E. all of the above
The use of _________ instruments is merely confined within laboratories as standardizing instruments?
The use of _________ instruments is merely confined within laboratories as standardizing instruments?
A. absolute
B. indicating
C. recording
D. integrating
E. none of the above