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Electrician
Electrician Set-1
Transformers
81

Transformers MCQ - Electrician (Set-1) with Answers

81) The function of a breather in a transformer is

to provide protection against over current

to suppress harmonics

to arrest flow of moisture into the tank

to control the level of oil in the tank

Answer is:

to arrest flow of moisture into the tank

Transformers MCQ - Electrician (Set-1) with Answers

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Related Transformers MCQ - Electrician (Set-1) with Answers

82) The function of a breather in a transformer is to

provide cooling air to the winding

arrest the flow of moisture into the tank

control the level of oil in the tank

allows tie moisture

Answer is:

arrest the flow of moisture into the tank

83) You have to measure the current and voltage of a 3 phase circuit of 6.6 kV and load of 500 kVA. In order to use a 5 A ammeter and 110 volts voltmeter, what is the ratio of CT and PT required ?

PT 60 : 1, CT 15 : 1

PT 60 : 1, CT 50 : 1

PT 1 : 60, CT 1 : 10

PT 25 : 1, CT 100 : 1

Answer is:

PT 60 : 1, CT 15 : 1

84) In a small workshop 5 A energy meter is connected through a CT. The meter reader recorded 1000 units for a particular month but, the meter shows only 25 units. What is the current in primary of CT when a current of 4 A is flowing through the meter ?

40 amps

160 amps

200 amps

250 amps

Answer is:

160 amps

85) The standard rated value of secondary current of current transformer as per IS 2705 (part I) -1981 shall be either :

5 ampere or 10 ampere

2.5 ampere or 5 ampere

1.5 ampere or 6 ampere

1 ampere or 5 ampere

Answer is:

1 ampere or 5 ampere

Transformers MCQ - Electrician (Set-1) with Answers

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