DC MOTORS - Practice Mode

1) What is the function of protective resistor in DC four point starter

To limit current in holding coil To limit armature current To limit field current To limit the speed

Correct Answer: To limit current in holding coil

2) Which type of starter is used for DC series motor

DOL starter Four point starter Two point starter Three point starter

Correct Answer: Two point starter

3) Which method of speed control used in DC shunt motor to control the speed below normal?

Field control Armature control Field tapping method Field diverter method

Correct Answer: Armature control

4) Which method of speed control used in DC motor to control the speed above normal

Field control Armature control Supply voltage control Tapped field control

Correct Answer: Field control

5) Which method of speed control used for variation of speed from zero to above normal?

Supply voltage Armature control Shunt field control Ward-Leanard system

Correct Answer: Ward-Leanard system

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