Three – phase Transformer connections – 1 – 1

1. For the star-star connection of three phase transformer, the phase angle between the phase voltages and line voltages on both primary and secondary side is :

(a) 0 degree
(b) 30 degree
(c) 60 degree
(d) 120 degree

ANSWER
Answer : (b)

EXPLANATION
No answer description available for this question. Let us discuss.

2. The phase shift in a star-star connected three phase transformer is :

(a) 0 degree
(b) 30 degree
(c) 60 degree
(d) 120 degree

ANSWER
Answer : (a)

EXPLANATION
No answer description available for this question. Let us discuss.

3. For the parallel operation of three phase transformers, which among the following connection is not applicable?

(a)  Δ – Δ to Y – Y
(b) Y – Δ to Δ – Y
(c) Y – Y to Y – Y
(d) None of these

ANSWER
Answer : (d)

EXPLANATION
No answer description available for this question. Let us discuss.

4. For large low voltage transformers, the most commonly connections used are :

(a) Star- star connection
(b) Delta-delta connection
(c) V connection
(d) All of these

ANSWER
Answer : (b)

EXPLANATION
No answer description available for this question. Let us discuss.

5. If K is the transformation ratio, then the secondary phase voltage of delta-delta connected three phase transformer will be :

(a) 1 / K times of the primary phase voltage
(b) Equal to the primary phase voltage
(c) 1 / K ∧ 2 times of the primary phase voltage
(d)  K times the primary phase voltage

ANSWER
Answer : (d)

EXPLANATION
No answer description available for this question. Let us discuss.

1
Be a Part of The New & Next

MCQs fb  MCQs G+

Share the Knowledge

GATE Total InfoGATE 2019 BooksFree Notes
IES Total InfoIES 2019 BooksFree Mock tests
JAM Total InfoJAM 2019 BooksEngg Diploma
PSUs Total InfoM Tech Total InfoUGC NET Total Info

General Knowledge Books

McqSeries.com is an online forum for multiple choice questions. This forum would be really-really helpful for those candidates who are preparing for examination conducted by Union Public Service Commission (like Civil Services Examination, Engineering Services Examination, Special Class Railway Apprentice, National Defence Academy, Combined Defence Services, etc.), Staff Selection Commission (like Combined Graduate Level, Junior Engineer, Food Corporation of India etc.), various public sector units (like DRDO, DMRC, BARC, BSNL, ONGC, etc.), Graduate Aptitude Test in Engineering, Indian Institute of Technology Entrance Examination etc. and many other national and state level examination.

Shares
GATE, IES & PSUs Total Information & GuidanceCheck Here!
Copy Protected by Chetan's WP-Copyprotect.