DGVCL EXAM PAPER (11-12-2011) QUIZ

An AC series circuit has R = 6 Ω, XL = 20 Ω and Xc = 12 Ω. The ciruit power factor will be

0.5 leading

0.6 lagging

0.6 leading

0.8 lagging

TRUE ANSWER : ?
YOUR ANSWER : ?

The motor used in celling fans is

Universal motor

Split phase motor

Capacitor start motor

Capacitor start capacitor run motor

TRUE ANSWER : ?
YOUR ANSWER : ?

The positive and negative sequence impedance of a transmission line are

Infinite

Equal

Zero

Different

TRUE ANSWER : ?
YOUR ANSWER : ?

The insulation coordination for UHV lines (above 500 kV) is done based on

Lightning surges

Lightning and switching surges

Voltage level of the line

Switching surges

TRUE ANSWER : ?
YOUR ANSWER : ?

At time t= 0+ , with zero initial condition, which of the following acts as a short circuit?

Voltage source

Resistor

Capacitor

Conductor

TRUE ANSWER : ?
YOUR ANSWER : ?

In the protection of transformers, harmonic restraint is used to guard against

Unbalanced protection

Magnetizing inrush current

Lightning

Switching over voltages

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Content gets corrupted

Content remains intact

Content is lost

Content is transferred to other memory

TRUE ANSWER : ?
YOUR ANSWER : ?

The best location of the power factor correction equipment to be installed in the transmission line is at

Any place

The receiving end

Middle of the line

The sending end

TRUE ANSWER : ?
YOUR ANSWER : ?

The bus bar zone faults are generally

Double line to ground faults

Single line to ground faults

Three phase short ciruits

Phase to phase faults

TRUE ANSWER : ?
YOUR ANSWER : ?

In which of the following motors, the stator and rotor magnetic fields rotate at the same speed?

Reluctance motor

Induction motor

Synchronous motor

Universal motor

TRUE ANSWER : ?
YOUR ANSWER : ?

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