A. 0°
B. 60°
C. 90°
D. 120°
Related Mcqs:
- 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° - The two pressure coils of a single phase power factor meter have_________________?
A. the same dimensions and the same number of turns
B. the same dimension but different number of turns
C. the same number of turns but different dimensions
D. none of the above - The resistance in the circuit of the moving coil of a dynamometer wattmeter should be_____________?
A. almost zero
B. low
C. high
D. none of the above - In a Weston frequency meter, the magnetic axes of the two fixed coils are__________________?
A. parallel
B. perpendicular
C. inclined at 60°
D. inclined at 120° - A dynamometer wattmeter can be used for______________?
A. both D.C. and A.C.
B. D.C. only
C. A.C. only
D. any 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 - In a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter was zero. The power factor of the load must be_______________?
A. unity
B. 0.5
C. 0.3
D. zero - A power factor meter has________________?
A. one current circuit and two pressure circuits
B. one current circuit and one pressure circuit
C. two current circuits and one pres¬sure circuit
D. none of the above - The power factor of a single phase load can be calculated if the instruments available are_____________?
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 - In a Weston synchronoscope, the fixed coils are connected across_______________?
A. bus-bars
B. incoming alternator
C. a lamp
D. none of the above
