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AE-JE Foundation EE : Electrical Machines Quiz - 7

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Question 1

The full load shaft torque of a 3-ϕ, 4-pole, 50 Hz induction motor is 200 N-m. If the rotor emf makes 120 cycles per minute, then what would be the motor output power?

Question 2

The maximum starting torque of a 3-phase induction motor is obtained when the rotor resistance is

Question 3

In a 3-ϕ phase induction motor, the value of stalling torque.

Question 4

When will a slip ring induction motor runs at super synchronous speed?

Question 5

Which of the following statement is true, when a 3-phase induction motor is loaded from no load to full load.

(i) Air gap flux decreases

(ii) Power factor improves

(iii) Torque decreases

Question 6

A 4 pole, 50 Hz induction machine is running at a speed of 1550 RPM. The induction machine will run as an:

Question 7

A 3-phase induction motor has a full-load slip of 3 percent at normal voltage. What will be the value of slip if it develops the same torque theoretically while operating at 110 percent of normal voltage?

Question 8

In a 3-phase induction motor, the regenerative braking occurs when:

Question 9

What is the ratio of mechanical power developed to rotor copper loss in the rotor of three phase induction motor?

Question 10

A SCIM having a rated slip of 4% on full load has a starting torque the same as full load torque the starting current is
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Jul 27AE & JE Exams

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Mohd. IrshadMohd. IrshadMember since Apr 2020
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