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GETCO Exam Paper (11-06-2017)

GETCO Exam Paper (11-06-2017)
For which one of the following materials, is the Hall Coefficient zero?

Intrinsic semiconductor
Metal
Alloy
Insulator

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GETCO Exam Paper (11-06-2017)
For the protection of power system against travelling waves, we use

overhead ground wires
None of these
surge diverters
earthing screens

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GETCO Exam Paper (11-06-2017)
In air blast circuit breaker resistance switching is used to

damp out the fast transient
reduce the magnitude of fault current
change the fault current power factor
control the CB operating time

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GETCO Exam Paper (11-06-2017)
Control rods used in nuclear reactors are made of

zirconium
boron
beryllium
lead

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GETCO Exam Paper (11-06-2017)
The thickness of insulation provided on the conductor depends upon

current rating and voltage rating
current rating
none
voltage rating

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GETCO Exam Paper (11-06-2017)
Fiber-optic cables are used in power system applications mainly for

all
communication between power station and load control centre
communication between power station and substation
SCADA

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