Overvoltage relay device function number.

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

The unit of retentivity is

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

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

With reduction of load on alternator

The process by which metallic parts are demagnetized is called

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

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.

What is the nature of the current flowing in the armature of DC machine?

Which of the following frequencies has the longest period?

If one of the resistors in a parallel circuit is removed, what happens to the total

resistance?

What is the purpose of using oil in the transformer?

Skin effect is proportional to

The three primary colors in the chrominance signal of a color TV are

An alternator running in parallel with the other alternators all having automatic

voltage regulators is to be taken off the bus. The usual procedure before opening

the switch is to

A lead acid battery having a 100 Ah capacity is 25% charged. After being

charged at 10 A for 5 hours, it will be approximately _ charged.

Which one of the following is not one of the relays of transmission line?

The area of hysteresis loop is the measure of

Slip rings are made of

Moving coil instruments are used

The efficiency of thermal plant is approximately _.

Merz – Price protection is used on

A magnetizing force of 1000 AT/m will produce a flux density of _ in air.

The greater percentage of materials are _ .

The greatest percentage of power loss in dc motor is due to

The charge of a hole is _.

Transient current in an RLC circuit is oscillatory when

As load pf of an alternator becomes more leading, the value of the generated

voltage required to give rated terminal voltage _.

This device is used to reflect back surges into the line.

Some of the arrangement for switch/panel boards are as follows, except _.

If a 440 V heater is used on 110 V supply, heat produced by it will be as _ much.

The fuse used for the overhead primary distributors is

Porcelain insulators are protected against creepage of surge current by the use

of _.

This is a lighting system wherein the percentage of upward and downward

brightness is the same.

One ampere-turn is equivalent to _ gilberts.

Which motor is used to start heavy loads?

The capacitor in a capacitor start induction run ac motor is connected in series

with _ winding?

Power circuit breakers can be classified according to operation, some of these

are, except

The lowest KAIC available commercially for miniature circuit breakers is

A 100 km transmission line has a 1000 ohms shunt capacitive reactance. What is

the capacitive reactance per km?

This is the least prevalent shunt fault among transmission and distribution lines.

In what year was the first 500 kV line in the world became operational?

The rms value of a half wave rectified current is 10 A. Its value for full wave

rectification would be _ amperes.

A standard candle emits a total luminous flux of _ lumens.

If starting voltage of a SCIM is reduced to 50% of its rated vlue, torque developed

is reduced by _ percent of its full load value.

What value of R is needed with 0 05 μF capacitor for an RC time constant of 0 02

sec?

Power in a balanced 3 phase system is measured by two wattmeter method and

it is found that the ratio of the two wattmeter readings is 2 is to 1. What is the

power factor of the system?

Power developed by dc motor is maximum when the ration of back emf and

applied voltage is

Which is not included in a basic communication circuit?

Two wattmeters can be used to measure 3phrase power for a

This is the least prevalent shunt fault among transmission and distribution lines.

Which is not characteristic of an ideal transformer

What is the IEEE number the device name AC TIME OverCurrent Relay

A type of electronics communication in which two party transmit at a time

What is the complex expression for a given alternating current,

I + 250sin (wt – 25deg)?

An LC series circuit with an inductance L and a capacitance C has an oscillation

frequency f. Two inductors, each with inductance L, and two capacitors, each with

capacitance C, are all wired in series and the circuit is completed. The oscillation

frequency is:

A magnet moves inside a coil. Consider the following factors:

I. strength of the magnet

II. number of turns in the coil

III. speed at which the magnet moves

Which can affect the emf induced in the coil?