Three-Phase Systems in Power Applications - General Questions (3)

Directions to Solve

Three-Phase Systems in Power Applications - General Questions

17.

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

A.	each phase voltage equals the difference of the corresponding load voltages
B.	each phase voltage equals the corresponding load voltage
C.	each phase voltage is one-third the corresponding load voltage
D.	each phase voltage is 60° out of phase with the corresponding load voltage

Answer: Option A

Explanation:

No answer description available for this question.

18.

In a certain three-wire Y-connected generator, the phase voltages are 2 kV. The magnitudes of the line voltages are

A.	2,000 V
B.	6,000 V
C.	666 V
D.	3,464 V

Answer: Option D

Explanation:

No answer description available for this question.

19.

In a -connected source driving a -connected load, the

A.	load voltage and line voltage are one-third the source voltage for a given phase
B.	load voltage and line voltage are two-thirds the source voltage for a given phase
C.	load voltage and line voltage cancel for a given phase
D.	load voltage, line voltage, and source phase voltage are all equal for a given phase

Answer: Option D

Explanation:

No answer description available for this question.

20.

In a three-phase system, when the loads are perfectly balanced, the neutral current is

A.	zero
B.	one-third of maximum
C.	two-thirds of maximum
D.	at maximum

Answer: Option A

Explanation:

No answer description available for this question.

21.

In a three-phase system, the voltages are separated by

A.	45°
B.	90°
C.	120°
D.	180°

Answer: Option C

Explanation:

No answer description available for this question.

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