TRANSFORMERS QUIZ

Current chopping mainly occurs in

sf 6 circuit breaker

air-blast circuit breaker

vaccum circuit breaker

oil circuit breaker

TRUE ANSWER : ?
YOUR ANSWER : ?

A fuse should have

high conductivity

low melting point

All of these

low cost

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YOUR ANSWER : ?

Which of the following is used in liquid fuses ?

sulphur hexafluoride

carbon tetrachloride

transformer oil

distilled water

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YOUR ANSWER : ?

Which of the following CB's is generally used in railways applications ?

low oil circuit breaker

air break circuit breaker

bulk oil circuit breaker

sf 6 circuit breaker

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A circuit breaker is a

current limiting device

current controlling device

circuit interrupting device

None of these

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Outdoor switchgear is generally used for voltage beyond

66 kV

11 kV

33 kV

132 kV

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For interrupting of high voltage and low current, the circuit breaker prefered is

all are correct

oil circuit breaker

vaccum circuit breaker

air-blast circuit breaker

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YOUR ANSWER : ?

Air blast circuit breakers for 400 kV power system are designed to operate in

50 milli-second

0.1 sec

0.5 sec

100 micro-second

TRUE ANSWER : ?
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A three phase circuit breaker is rated at 2000 MVA, 33 kv. The symmetrical breaking current is

80 kA

20 kA

35 kA

60 kA

TRUE ANSWER : ?
YOUR ANSWER : ?

A.C. network analyzer is used to solve problems of

Load flow, short-circuit and stability

Load flow and short-circuit

Load flow

Load flow and stability

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YOUR ANSWER : ?

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