Question 1

In a balanced three-phase delta-connected system which has three loads, each of resistance 100 Ω, and a line voltage of 440 V the line current is:

Accepted Answer

A)   7.60 A
B)   4.40 A
C)   2.54 A
D)   1.27 AE) B) and D)
F) All of the above A

Question 2

In a balanced three-phase delta-connected system which has three loads, each of resistance 100 Ω, and a line voltage of 440 V the phase voltage is:

Accepted Answer

A)   762 V
B)   440 V
C)   311 V
D)   254 VE) A) and C)
F) C) and D)

Question 3

In a balanced three-phase star-connected system which has three loads, each of
Resistance 100 Ω, and a line voltage of 440 V the phase voltage is:

Accepted Answer

A)   762 V
B)   440 V
C)   311 V
D)   254 VE) A) and B)
F) None of the above

Question 4

Decide whether each of these statements is True (T)  or False
For a balanced three-phase supply, for the same power:
(i)  Loads connected in a delta form have a higher line voltage than star-connected systems.
(ii)  Loads connected in a delta form have a smaller line current than star-connected systems.

Accepted Answer

A)   (i)  T (ii)  T
B)   (i)  T (ii)  F
C)   (i)  F (ii)  T
D)   (i)  F (ii)  FE) B) and D)
F) C) and D) D

Question 5

In a balanced three-phase star-connected system which has three loads, each of
Resistance 100 Ω, and a line voltage of 440 V the line current is:

Accepted Answer

A)   7.60 A
B)   4.40 A
C)   2.54 A
D)   1.27 AE) B) and C)
F) None of the above C

Exam 10: Three-Phase A.C

In a balanced three-phase delta-connected system which has three loads, each of resistance 100 Ω, and a line voltage of 440 V the line current is:

Correct Answer
verified
A

In a balanced three-phase delta-connected system which has three loads, each of resistance 100 Ω, and a line voltage of 440 V the phase voltage is:

Correct Answer
verified

In a balanced three-phase star-connected system which has three loads, each of Resistance 100 Ω, and a line voltage of 440 V the phase voltage is:

Correct Answer
verified

Correct Answer
verified
D

In a balanced three-phase star-connected system which has three loads, each of Resistance 100 Ω, and a line voltage of 440 V the line current is:

Correct Answer
verified
C

Exam 10: Three-Phase A.C

In a balanced three-phase delta-connected system which has three loads, each of resistance 100 Ω, and a line voltage of 440 V the line current is:

Correct AnswerverifiedA

In a balanced three-phase delta-connected system which has three loads, each of resistance 100 Ω, and a line voltage of 440 V the phase voltage is:

Correct AnswerverifiedShow Answer

In a balanced three-phase star-connected system which has three loads, each of Resistance 100 Ω, and a line voltage of 440 V the phase voltage is:

Correct AnswerverifiedShow Answer

Correct AnswerverifiedD

In a balanced three-phase star-connected system which has three loads, each of Resistance 100 Ω, and a line voltage of 440 V the line current is:

Correct AnswerverifiedC

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
D

Correct Answer
verified
C