DC Motors
The most suitable motor for elevators is the ____ motor.

Differentially compuonded
Series
Cummulative compounded
Shunt

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DC Motors
If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens

Nothing will happen to motor
This will make armature to take heavy current, possibly burning it
Motor will come to stop
This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses

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DC Motors
The speed of a dc motor is

inversely proportional to applied voltage
inversely proportional to flux per pole
None of the listed here
Directly proportional to flux per pole

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