Explore topic-wise MCQs in Electrical Machines Questions and Answers.

This section includes 2 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Machines Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.	A synchronous generator is operating with a Ef=1.40pu. This machine having Xs of 1.2pu, is delivering a synchronous power of 0.5pu to the bus. If the prime-mover torque is increased by 1%, by how much will the synchronous power P change?
A.	1%
B.	10%
C.	-1%
D.	4%
Answer» B. 10%

Discussion

2.	If the synchronous machine is connected to an infinite bus of constant voltage Vt, through a transformed, a transmission line of reactance ‘X’. Then power for a cylindrical machine is?
A.	P = (Ef*Vt sinδ)/(Xs + X)
B.	P = (Ef*Ef sin2δ)/(Xs + X)
C.	P = (Ef*Vt sinδ)/(Xs – X)
D.	P = (Vt*Vt sinδ)/(Xs + X)
Answer» B. P = (Ef*Ef sin2δ)/(Xs + X)

Discussion

Explore topic-wise MCQs in Electrical Machines Questions and Answers.

A synchronous generator is operating with a Ef=1.40pu. This machine having Xs of 1.2pu, is delivering a synchronous power of 0.5pu to the bus. If the prime-mover torque is increased by 1%, by how much will the synchronous power P change?

If the synchronous machine is connected to an infinite bus of constant voltage Vt, through a transformed, a transmission line of reactance ‘X’. Then power for a cylindrical machine is?