Power factor improvement may be achieved by the

use of

• synchronous motor

• synchronous converter

• long transmission line

• induction motor

Overvoltage relay device function number.

• 64

• 56

• 60

• 59

A test used to determine the equivalent resistance of an induction motor is _.

• No-load Test

• Short-circuit Test

• Blocked-rotor Test

• Polarity Test

The unit of retentivity is

• Ampere turn

• ampere turn/meter

• ampere turn/weber

• dimensionless

In running condition the rotor reactance of 3Φ induction motor is proportional to

• induced emf

• slip

• supply voltage

• rotor resistance

The ratio of the total flux to useful flux is called _.

• Leakage Factor

• Flux Factor

• Mutual flux

• Magnetic Factor

With reduction of load on alternator

• the frequency decreases

• the frequency increases

• the frequency oscillates

• the frequency remains the same

The process by which metallic parts are demagnetized is called

• degreasing

• degaussing

• degrading

• demagnetizing

The gas inside the inner discharge tube of a sodium vapor lamp is

• Neon

• Argon

• Nitrogen

• Helium

What is the force between two wires carrying currents 10 and 50 A each? The

lengths of the wires are 50 cm and are separated by 5 cm distance.

• 0.005 N

• 0.002 N

• 0.001 N

• 0.004 N