Explore topic-wise MCQs in Transformers.

This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Transformers knowledge and support exam preparation. Choose a topic below to get started.

1.

When secondaries are connected in phase opposition, power drawn by the circuit is equal to ___________a) 2*Pib) Pi2c) Pid) 2*Pc 8.When the AC supply at the primary side of a transformer are shorted, power drawn by the circuit is equal to ___________a) 2*PCb) 2*Pic) 2*PC + 2*Pid) Can’t be determinedView Answer 9.Total power required for Sumpner’s test is given by ________

A. 2*Pib) Pi2c) Pid) 2*Pc 8.When the AC supply at the primary side of a transformer are shorted, power drawn by the circuit is equal to ___________a) 2*PCb) 2*Pic) 2*PC + 2*Pid) Can’t be determinedView Answer 9.Total power required for Sumpner’s test is given by ________a) PC + Pi
B. Pi2c) Pid) 2*Pc 8.When the AC supply at the primary side of a transformer are shorted, power drawn by the circuit is equal to ___________a) 2*PCb) 2*Pic) 2*PC + 2*Pid) Can’t be determinedView Answer 9.Total power required for Sumpner’s test is given by ________a) PC + Pib) PC + 2Pi
C. Pid) 2*Pc 8.When the AC supply at the primary side of a transformer are shorted, power drawn by the circuit is equal to ___________a) 2*PCb) 2*Pic) 2*PC + 2*Pid) Can’t be determinedView Answer 9.Total power required for Sumpner’s test is given by ________a) PC + Pib) PC + 2Pic) 2PC + Pi
D. 2*Pc 8.When the AC supply at the primary side of a transformer are shorted, power drawn by the circuit is equal to ___________a) 2*PCb) 2*Pic) 2*PC + 2*Pid) Can’t be determinedView Answer 9.Total power required for Sumpner’s test is given by ________a) PC + Pib) PC + 2Pic) 2PC + Pid) 2(PC + Pi)View Answer
Answer» B. Pi2c) Pid) 2*Pc 8.When the AC supply at the primary side of a transformer are shorted, power drawn by the circuit is equal to ___________a) 2*PCb) 2*Pic) 2*PC + 2*Pid) Can’t be determinedView Answer 9.Total power required for Sumpner’s test is given by ________a) PC + Pib) PC + 2Pi
Discussion
2.

In Sumpner’s test _____________

A. Two secondaries are connected in phase opposition
B. Two secondaries are connected in phase addition
C. Can be connected in either way
D. Never connected with each other
Answer» B. Two secondaries are connected in phase addition
Discussion
3.

In Sumpner’s test __________

A. Primaries can be connected in either way
B. Primaries are connected in parallel with each other
C. Primaries of both transformers are connected in series with each other
D. No need to connect primaries
Answer» C. Primaries of both transformers are connected in series with each other
Discussion
4.

Sumpner’s test is performed on _________

A. Single transformer at a time
B. Only two transformers at a time
C. Minimum 2 transformers at a time
D. Many transformers at a time
Answer» C. Minimum 2 transformers at a time
Discussion
5.

Sumpner’s test is conducted on transformers to study effect of ____________

A. Temperature
B. Stray losses
C. All-day efficiency
D. Cannot be determined
Answer» B. Stray losses
Discussion
6.

TOTAL_POWER_REQUIRED_FOR_SUMPNER‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•S_TEST_IS_GIVEN_BY_________?$#

A. PC + Pi
B. PC + 2Pi
C. 2PC + Pi
D. 2(PC + Pi)
Answer» E.
Discussion
7.

When the AC supply at the primary side of a transformer are shorted, power drawn by the circuit is equal to __________?

A. 2*PC
B. 2*Pi
C. 2*PC + 2*Pi
D. Can’t be determined
Answer» B. 2*Pi
Discussion
8.

When secondaries are connected in phase opposition, power drawn by the circuit is equal to ___________

A. 2*P<sub>i</sub>
B. Pi<sup>2</sup>
C. Pi
D. 2*Pc
Answer» B. Pi<sup>2</sup>
Discussion
9.

Which test is sufficient for efficiency of two identical transformers under load conditions?

A. Short-circuit test
B. Back-to-back test
C. Open circuit test
D. Any of the above
Answer» C. Open circuit test
Discussion
10.

In Sumpner’s test __________$

A. Primaries can be connected in either way
B. Primaries are connected in parallel with each other
C. Primaries of both transformers are connected in series with each other
D. No need to connect primaries
Answer» C. Primaries of both transformers are connected in series with each other
Discussion
11.

Sumpner’s test is performed on _________$

A. Single transformer at a time
B. Only two transformers at a time
C. Minimum 2 transformers at a time
D. Many transformers at a time
Answer» C. Minimum 2 transformers at a time
Discussion
12.

Which of the following tests are enough to find all the parameters related to a transformer?

A. OC test
B. OC, SC test
C. OC, SC, Sumpner’s test
D. Sumpner’s test
Answer» D. Sumpner‚Äö√Ñ√∂‚àö√ë‚àö¬•s test
Discussion
13.

Sumpner’s test is conducted on transformers to study effect of ____________

A. Temperature
B. Stray losses
C. All-day efficiency
D. Cannot be determined
Answer» B. Stray losses
Discussion