Why does DC motor sometimes run too fast when under-loaded? – McqOptions

MCQOPTIONS

1.	Why does DC motor sometimes run too fast when under-loaded?
A.	Due to weak field.
B.	Due to high line voltage
C.	Due to brush-shifted to neutral
D.	All of the above
Answer» B. Due to high line voltage

Discussion

No Comment Found

Related MCQs

Run-away for large DC machine is avoided by using _________
A laboratory group was working with a set of 3-hp shunt DC motor. But there was a mistake that it was fused with a 0.3A fuse instead 3A fuse. Then it was started _________
The torque limit of speed for a shunt motor _________
Armature voltage control works for speeds _____ base speed and field resistance control works well for speed _____ base speed.
To implement armature voltage control, it must be ensured that _________
Small DC motors have best speed control by _________
At a very low speed, increase in field resistance will _________
Ward-Leonard system of system of speed control is not recommended for _________
The PWM control of DC motor varies _________
ARMATURE_VOLTAGE_CONTROL_WORKS_FOR_SPEEDS_______BASE_SPEED_AND_FIELD_RESISTANCE_CONTROL_WORKS_WELL_FOR_SPEED_______BASE_SPEED.?$