Equal Area Criterion - Electrical Engineering (MCQ) questions and answers

1)   What are the common assumptions made for the equal area criterion?

a. The transmission line and machine resistances are neglected.
b. Rotor speed of the machine is constant
c. Mechanical input remains constant.
d. All of these
e. None of these
Answer  Explanation 

ANSWER: All of these

Explanation:
No explanation is available for this question!
2)   For which among the following cases is the equal area criterion of stability used?

a. One machine and infinite bus bar
b. No load on bus bar
c. Many machines and infinite bus bar
d. All of these
e. None of these
Answer  Explanation 

ANSWER: One machine and infinite bus bar

Explanation:
No explanation is available for this question!
3)   Which stability information is obtained from the equal area criterion?

a. Absolute stability
b. Transient stability
c. Steady state stability
d. Both (b) and (c)
e. All of these
Answer  Explanation 

ANSWER: Absolute stability

Explanation:
No explanation is available for this question!
4)   Under what condition is the system stable under equal area criterion?

a. The area under the curve Pa – δ curve must increase to ∞.
b. The area under the curve Pa – δ curve must become equal to 1
c. The area under the curve Pa – δ curve must reduce to zero.
d. None of these
Answer  Explanation 

ANSWER: The area under the curve Pa – δ curve must reduce to zero.

Explanation:
No explanation is available for this question!

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