A. mercury motor meters
B. commutator motor meters
C. induction type single phase energy meters
D. all of the above
Related Mcqs:
- Induction type single phase energy meters measure electric energy in_______________?
A. kW
B. Wh
C. kWh
D. VAR
E. None of the above - Which of the following meters are not used on D.C. circuits______________?
A. Mercury motor meters
B. Commutator motor meters
C. Induction meters
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 - The desirable static characteristics of a measuring system are______________?
A. accuracy and reproducibility
B. accuracy, sensitivity and reproducibility
C. drift and dead zone
D. static error - An ammeter is a______________?
A. secondary instrument
B. absolute instrument
C. recording instrument
D. integrating instrument - The operating voltage of a meggar is about_______________?
A. 6 V
B. 12 V
C. 40 V
D. 100 V - To avoid the effect of stray magnetic field in A.C. bridges we can use_______________?
A. magnetic screening
B. Wagner earthing device
C. wave filters
D. any of the above - In a single phase power factor meter the phase difference between the currents in the two pressure coils is___________________?
A. exactly 0°
B. approximately 0°
C. exactly 90°
D. approximately 90° - In an energy meter braking torque is produced to________________?
A. safe guard it against creep
B. brake the instrument
C. bring energy meter to stand still
D. maintain steady speed and equal to driving torque - Which of the following is measured by using a vector voltmeter ?
A. Amplifier gain and phase shift
B. Filler transfer functions
C. Complex insersion loss
D. All of the above
