Sequence Impedance - Electrical Engineering (MCQ) questions and answers

1)   What happens to the zero sequence currents, if the neutral in the Y connection is absent?

a. Minimum
b. Zero
c. Maximum
d. ∞
Answer  Explanation 

ANSWER: Zero

Explanation:
No explanation is available for this question!
2)   What is the value of negative sequence impedance?

a. 1
b. Z
c. Same as positive sequence
d. ∞
Answer  Explanation 

ANSWER: Same as positive sequence

Explanation:
No explanation is available for this question!
3)   In the absence of neutral what will be the value of Z0 ?

a. 1
b. 0
c. Z
d. ∞
Answer  Explanation 

ANSWER: ∞

Explanation:
No explanation is available for this question!
4)   What is the value of the zero sequence impedance?

a. Z 0 = Z
b. Z 0 = Z + 2 Zn
c. Z 0 = Z + 3 Zn
d. Z 0 = 0
Answer  Explanation 

ANSWER: Z 0 = Z + 3 Zn

Explanation:
No explanation is available for this question!

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