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Which of the following is used in liquid fuses ?
distilled water
sulphur hexafluoride
carbon tetrachloride
transformer oil
distilled water
sulphur hexafluoride
carbon tetrachloride
transformer oil
Answer
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When the circuit breaker operates under fault conditions, the greatest noise is produced in
air-blast circuit breaker
oil circuit breaker
sf6 circuit breaker
vaccum circuit breaker
air-blast circuit breaker
oil circuit breaker
sf6 circuit breaker
vaccum circuit breaker
Answer
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The material used for fuse must have
Low melting point and low specific resistance
low melting point and any specific resistance
low melting point and high specific resistance
high melting point and low specific resistance
Low melting point and low specific resistance
low melting point and any specific resistance
low melting point and high specific resistance
high melting point and low specific resistance
Answer
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A switchgear is device used for
switching and controlling an electrical circuit
interrupting an electrical circuit
switching, controlling and protecting the electrical circuit and equipment
switching an electrical circuit 111
switching and controlling an electrical circuit
interrupting an electrical circuit
switching, controlling and protecting the electrical circuit and equipment
switching an electrical circuit 111
Answer
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To protect most of the electrical equipment handling low power, the types of relays used are
None of these
Electronic and bimetallic
Both of the listed here
Thermocouple
None of these
Electronic and bimetallic
Both of the listed here
Thermocouple
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The short circuit in any winding of the transformer is the result of
mechanical vibration
impulse voltage
loose connection
insulation failure
mechanical vibration
impulse voltage
loose connection
insulation failure
Answer
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