Types of Supply System - MCQs with answers

Types of Supply System - MCQs with answers

Q1. The generating voltage and frequency in India is about?

a. 11 kV and 60 Hz
b. 11 kV and 50 Hz
c. 220 kV and 60 Hz
d. 220 kV and 50 Hz

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Q2. Which type of system is generally adopted for the generation and transmission of electrical power?

a. 3 phase 4 wire
b. 2 phase 3 wire
c. 3 phase 3 wire
d. None of these

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Q3. The rated voltage of a 3 phase power system is given by

a. rms peak voltage
b. Peak phase voltage.
c. rms line to line voltage
d. Peak line to line voltage.

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Q4. Which of these systems uses the 3 phase 4 wire system?

a. Primary distribution
b. Secondary distribution
c. Primary transmission.
d. Secondary transmission.

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Q5. With the same maximum voltage to earth, which among the following ac systems with 0.8 pf will need more copper compared to 2 wire system?

a. Single phase, 2 wire
b. Single phase, 3 wire
c. Three phase, 3 wire
d. Three phase, 4 wire

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Q6. Assertion (A): 3 wire dc distribution system is preferred over 2 wire dc distribution system.

Reason (R): the 3 wire dc system of distribution is more safe.

a. Both A and R are true and R is the correct explanation of A
b. Both A and R are true and R is not the explanation of A
c. A is true but R is false
d. A is false but R is true.

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Q7. Assertion (A): Transmission of electrical power by dc is economical than that with ac.

Reason (R): In case of dc transmission, there is no charging current which contributes to the continuous load, even on no load.

a. Both A and R are true and R is the correct explanation of A
b. Both A and R are true and R is not the explanation of A
c. A is true but R is false
d. A is false but R is true.

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