DGVCL EXAM PAPER (11-12-2011) QUIZ

Different computers are connected to a LAN by a cable and a

Interface card

Modem

Special wires

Telephone line

TRUE ANSWER : ?
YOUR ANSWER : ?

If a relay fails to operate inspite of a fault in its own zone of protection, it is said to

Pick up

Reach

Over reach

Under reach

TRUE ANSWER : ?
YOUR ANSWER : ?

What type of insulator is used if the direction of the transmission line is to be changed?

Pin type

Suspebsion type

Strain type

Shakle type

TRUE ANSWER : ?
YOUR ANSWER : ?

The effect of electric shock on the human body depends on

Voltage

Duration of contact

Current

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The transient stability of a power system can be improved by

Increasing the turbine valve opening

Single pole switching of circuit breakers

Phase shifting transformer

Excitation control

TRUE ANSWER : ?
YOUR ANSWER : ?

A fuse wire should have

High specific resistance and low melting point

High specific resistance and high melting point

Low specific resistance and high melting point

Low specific resistance and low melting point

TRUE ANSWER : ?
YOUR ANSWER : ?

The efficiency of a transformer at full load, 0.8 p.f. lag is 90%. Its efficiency at full load, 0.8 p.f. lead will be

80 %

More than 90%

Less than 90%

90 %

TRUE ANSWER : ?
YOUR ANSWER : ?

Ybus used in power flow studies and Zbus used in short circuit studies

Are transpose of each other

Have no inter relation

Are the same

Are inverse of each other

TRUE ANSWER : ?
YOUR ANSWER : ?

What happens to the contents of RAM (Random Access Memory) when the power of the computer is turned off?

Content is transferred to other memory

Content remains intact

Content gets corrupted

Content is lost

TRUE ANSWER : ?
YOUR ANSWER : ?

A 3 phase, 6 pole induction motor operates on 440 V, 50 Hz, supply. If the actual speed of the motor is 960 rpm the slip will be

4 %

0.4 %

6 %

5 %

TRUE ANSWER : ?
YOUR ANSWER : ?

↑