Sumpners Test in Single-Phase Transformer - MCQs with Answers

Sumpners Test in Single-Phase Transformer - MCQs with Answers

Q1. Which test is also called as back to back test?

a. Retardation test
b. Sumpner’s test
c. Field test
d. Voltage drop test

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Q2. While conducting the sumpner’s test, the primaries of the two identical transformers are connected in parallel across the supply. The secondary’s are connected in

a. Parallel
b. Series opposition
c. Both in series and parallel
d. Not connected at all

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Q3. In sumpner’s test, the net voltage in the local circuit of secondary’s is

a. Equal to zero
b. Twice of the induced emf in each secondary’s
c. Equal to the induced emf in each secondary’s
d. Square of the induced emf in each secondary’s

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Q4. While performing sumpner’s test on transformer, if the secondary’s are not in series opposition then the meter will read

a. Equal to 0
b. Twice of the induced emf in each secondary’s
c. Equal to the induced emf in each secondary’s
d. Keep fluctuating

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Q5. If W1 is the input power measured by the wattmeter connected across the primaries and W2 is the measurement of wattmeter connected in secondary’s while performing sumpner’s test then iron losses and copper losses is equal to

a. W1 , W2
b. W1 / 2 , 2 * W2
c. 2 * W1 , W2 / 2
d. W1 / 2 , W2 / 2

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