@⇒ Transformers ⇒ Electrical Engineering Multiple Choice Questions / Objective type questions, MCQ's, with question and answers, download free PDF, short cut notes, rapid fire notes, best theory

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Q1.	The nominal short-circuit voltage of the transformer is defined as percentage of
A.	the rated primary voltage [Correct Answer]
B.	the rated secondary voltage [Wrong Answer]
C.	the test voltage [Wrong Answer]
D.	the nominal transformation ratio [Wrong Answer]
E.	none of the above [Wrong Answer]
View Answer 83 -34 Explanation:- Answer : A Discuss it below : Rasbihari Malav Said on 2018-02-02 13:19:00 Nominal short circuit voltage is the about 25% of primary rated voltage so that rated primary current can be flow during short circuit test. So..option A is correct Md Said on 2016-11-15 05:16:17 Nominal. Short circuit of voltage of the transformer = rated primery voltage / rated secondary voltage So option E is correct not A. Click here for more comments


Q2.	Buchholz's relay gives warning and protection against
A.	electrical fault inside the transformer itself [Correct Answer]
B.	electrical fault outside the transformer in outgoing feeder [Wrong Answer]
C.	either of the above [Wrong Answer]
D.	none of the above [Wrong Answer]
View Answer 61 -14 Explanation:- Answer : A Discuss it below : Click here for more comments


Q3.	The purpose of a breather in a transformer is to
A.	provide cooling to the winding [Wrong Answer]
B.	take insulting oil from the conservator [Wrong Answer]
C.	provide insulation to the winding [Wrong Answer]
D.	extract moisture from the air [Correct Answer]
View Answer 53 -19 Explanation:- Answer : D Discuss it below : Click here for more comments


Q4.	In a transformer an insulating material may fail due to
A.	moisture [Wrong Answer]
B.	dust [Wrong Answer]
C.	voids in the winding [Wrong Answer]
D.	any of the above [Correct Answer]
View Answer 36 -18 Explanation:- Answer : D Discuss it below : Click here for more comments


Q5.	The value of useful flux least depends on
A.	load [Correct Answer]
B.	magnetomotive force [Wrong Answer]
C.	voltage [Wrong Answer]
D.	all of the above [Wrong Answer]
View Answer 35 -14 Explanation:- Answer : A Discuss it below : Click here for more comments

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