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AE-JE Foundation EE : Electrical Machines Quiz -3

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Question 1

In the transformer circuit shown in the given figure, provided V1 > V2, the power transferred from primary to secondary inductively is proportional to:

Question 2

When the two windings of a transformer are connected electrically, it is called as:

Question 3

When is an Autotransformer used in transmission and distribution?

Question 4

An auto-transformer having a transformation ratio of 0.9 supplies a load of 10 kW. The power transferred inductively from primary to secondary is:

Question 5

Consider the following statements regarding the application of auto transformer.
A) To give a small boost to distribution cable to correct for the voltage drop.
B) To suit the furnace winding from 230V supply.
C) Used as auto starter to give up 100% of full load voltage to an induction motor during starting.
D) Also used where there is an isolation.
Which of the following statement is/are correct?

Question 6

Autotransformer can only be connected in

Question 7

Auto transformer can’t be used in/as

Question 8

What is the transformation ratio In an autotransformer if the power transferred inductively is equal to the power conducted through?

Question 9

Autotransformer is used as economical when its transformation ratio is?

Question 10

in a step down autotransformer, if the transformation ratio increases then the saving of copper?
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Jul 21AE & JE Exams

Posted by:

Chetan GoyalChetan GoyalMember since Mar 2021
AIR 1805, GATE2021
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