DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011)
Permittivity is expressed in terms of

farad/sq. m.

Farad/m

N/m

Weber /m

farad/sq. m.

Farad/m

N/m

Weber /m

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DGVCL Exam Paper (11-12-2011)
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

More than 90%

80 %

90 %

Less than 90%

More than 90%

80 %

90 %

Less than 90%

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DGVCL Exam Paper (11-12-2011)
If a 5 A fuse is blown frequently in a house lighting circuit, it is required to

Insert a fuse of higher voltage rating

Insert a fuse of higher current rating

Reduce the load

Check the load

Insert a fuse of higher voltage rating

Insert a fuse of higher current rating

Reduce the load

Check the load

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DGVCL Exam Paper (11-12-2011)
The motor used in celling fans is

Capacitor start capacitor run motor

Split phase motor

Universal motor

Capacitor start motor

Capacitor start capacitor run motor

Split phase motor

Universal motor

Capacitor start motor

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DGVCL Exam Paper (11-12-2011)
The main advantage of using fractional pitch winding is to refuce

Cost of the machine

Harmonics in the generated emf

Size of the machine

Amount of copper in the winding

Cost of the machine

Harmonics in the generated emf

Size of the machine

Amount of copper in the winding

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DGVCL Exam Paper (11-12-2011)
The picture on the monitor of a computer is made up of tiny coloured dots called

Icons

Pixels

Points

Spots

Icons

Pixels

Points

Spots

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