Exam 6: Electric Motors and Drives: Exploring Speed, Control, and Efficiency

The size of a excavator is usually expressed in terms of

Introduction of automation in production process has become possible only because of the use of

Which of the following motor is preferred for synthetic fibre mills ?

A typical active load is

In synthetic fibre mills motor with

DC motor are still preferred for use in

Which of the following motors is preferred when quick speed reversal is the main consideration?

In jaw crushers, a motor has to often start against

Motor used for elevators is generally

In squirrel cage induction motors which of the following methods of starting cannot be used ?

Power factor in case of reluctance motor is

Which of the following motors is usually preferred for kiln drives?

For high frequency choppers the device that is preferred is

Which off the following motors is preferred when a smooth and resize speed control over a wide range is desired?

Which electromagnet is preferred for noiseless operation

The basic elements of an electric drive are

Reluctance motor is a

The efficiency of reluctance motor is around

Ward-Leonard controlled dc drives are generally used for

A reluctance motor on over-load runs as