Test 4

No-load speed of which of the following motor is highest?

• Series Motor

• Shunt motor

• Cumulative compound motor

• Differential compound motor

Which type of speed control method is suitable to get speeds above the base speed?

• Flux control method

• Armature control method

• Rheostaic control method

• Resistance control method

In ----------- method a resistance is connected in parallel with the armature.

• Voltage control method

• Flux control method

• Resistance control method

• None of these

Starters are employed in motor circuits to reduce--------------

• Starting current

• Load torque

• Armature resistance

• Back emf

Ward leonard system of speed control is suitable to get speed;

• Above base speed

• Below base speed

• rated speed

• All these

The Ward leonard system of speed control falls in the -------------method.

• Voltage control

• Resistance control

• Rheostatic control

• None of these

Three point starter is suitable for the starting of DC ----- motor

• Shunt

• Series

• Short shunt

• Shunt and series

In a three point starter, the NVC and------------- are connected in series.

• Field coil

• Armature coil

• Field and armature coil

• None of these

In resistance starter the starter resistor is connected in series with the ----- at the time of starting

• Armature

• Field

• Both the field and the armature

• none of these

In a four point starter, the movable arm is held in position by---------------

• NVC magnet

• Overload magnet

• Resistor studs

• None of these