DGVCL EXAM PAPER (11-12-2011) QUIZ

A fixed step by step procedure for finding the solution of a problem on computer is called

Logic

Hardware

Software

Algorithm

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

Voltage source

Capacitor

Resistor

Conductor

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Reactance relay is used to protect against

Over voltage faults

Both phase and earth faults

Earth faults only

Phase faults only

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In a power plant, a reserve generating capacity which is not in service but is in operation is known as

Spinning reserve

Hot reserve

Cold reserve

Firm power

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

Pin type

Suspebsion type

Shakle type

Strain type

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It is difficult interrupt a capacitive current because

Stored energy in the capacitor is very high

Current magnitude is very small

It has a leading power factor

The restriking voltage can be high

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The corona effect can be minimized by increasing

Both spacing between the conductors and diameter of the conductor

Diameter of the conductor

Spacing between the conductors

The length of the conductor

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The purpose of providing a choke in a tube light is

To avoid radio interference

To limit the current to an appropriate value

To eliminate corona effect

To improve the power factor

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The circuit breaker generally used in railway traction is

Vacuum CB

Bulk Oil CB

Air break CB

Minimum Oil CB

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The purpose of skewing of rotor slots in an induction motor is

To reduce the locking tendency of the rotor

To increase the breadth factor

To reduce the magnetic hum of the motor

To increase the distributuion factor

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