Three Phase Systems In Power Applications Multiple Choice Questions

Three Phase Systems In Power Applications

Question 1.

In a Y-connected source feeding a ∆-connected load,

A.

 Each phase of the load has one-third of the full line voltage across it

B.

 Each phase of the load has two-thirds of the full line voltage across it

C.

 Each phase of the load has the full line voltage across it

D.

 Each phase of the load has a voltage across it equal to √3

Explanation :

Explanation Not Provided

Question 2.

The stator is the rotating assembly in a generator or motor.

A.

 True

B.

 False

Explanation :

Explanation Not Provided

Question 3.

In a Y-connected circuit, between each line voltage and the nearest phase voltage, there is a phase angle of

A.

 0°

B.

 30°

C.

 60°

D.

 120°

Explanation :

Explanation Not Provided

Question 4.

Compare the total copper cross sections in terms of current-carrying capacity for a single-phase and a three-phase 120 V system with effective load resistance of 15 Ω.

A.

 Single-phase 32 A; three-phase 16 A

B.

 Single-phase 16 A; three-phase 8 A

C.

 Single-phase 8 A; three-phase 4 A

D.

 Single-phase 16 A; three-phase 0 A

Explanation :

Explanation Not Provided

Question 5.

An alternator is an electromechanical ac generator.

A.

 True

B.

 False

Explanation :

Explanation Not Provided

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