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Electrician Set-1
Transformers
75

Transformers MCQ - Electrician (Set-1) with Answers

75) Current transformers are classified into five types. Which type of current transformer (C.T.) principle is used in clip on or clamp on Ammeter ?

Oil immersed C.T.

Dry type C.T

Ring type C.T.

Wound type C.T.

Answer is:

Ring type C.T.

Transformers MCQ - Electrician (Set-1) with Answers

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

76) What is the formula to be used to measure the actual power consumed, when the wattmeter is used along with C.T. and P.T. ?

Wattmeter reading x C.T. ratio

Wattmeter reading x P.T. ratio

Wattmeter reading x C.T. ratio x P.T. ratio

(Wattmeter reading/C.T. ratio) x P.T. ratio

Answer is:

Wattmeter reading x C.T. ratio x P.T. ratio

77) When using a potential transformer, it should be connected to the :

primary winding

secondary winding

low voltage winding

high voltage winding

Answer is:

secondary winding

78) What is the standard rating of secondary of potential transformers ?

110 V

220 V

330 V

440 V

Answer is:

110 V

79) You find a C.T. of 10 : 1 ratio and P.T. of 100 : 1 ratio are available in the stores. Ammeter of 0 to 5 amperes and voltmeter of 0 to 110 V are also available. The maximum high value of voltage and current that could be measured by using the above is

1100 V, 50 A

11 kV, 50 A

11 kV, 500 A

110 kV, 500 A

Answer is:

11 kV, 50 A

Transformers MCQ - Electrician (Set-1) with Answers

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