Electrical Machine - II (3150910) MCQs

MCQs of Induction Machines

Showing 31 to 40 out of 95 Questions
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31.

Rotor emf per phase at standstill produce in the rotor is proportional to ________

(a)

Rotor Current
(b)

Flux per Stator pole (r.m.f) Øs
(c)

Slip
(d)

All of these
Answer:

Option (b)

32.

What is the condition to derive Starting torque from Developed torque?

(a)

R2 = SX2
(b)

Slip = 1
(c)

R2 = X2
(d)

PF = 1
Answer:

Option (b)

33.

What is the condition to derive Maximum Starting torque from Developed torque?

(a)

R2 = SX2
(b)

Slip = 1
(c)

R2 = X2
(d)

Both S=1 and R2 = X2
Answer:

Option (d)

34.

What is the condition to derive Maximum rinning torque from Developed torque?

(a)

R2 = SX2
(b)

Slip = 1
(c)

R2 = X2
(d)

Both S=1 and R2 = sX2
Answer:

Option (d)

35.

Devloped Torque   _________ rotor flux (∅𝟐) and __________ Rotor PF

(a)

Directly Propositional     &     Inversely  Propositional
(b)

Inversely  Propositional     &     Directly Propositional 
(c)

Directly Propositional     &     Directly Propositional 
(d)

Directly Square Propositional     &     Inversely  Square Propositional
Answer:

Option (b)

36.

Devloped Torque   _________  Supply Voltage (V) and __________ Rotor Resistance (R2)

(a)

Directly Propositional     &     Inversely  Propositional
(b)

Inversely  Propositional     &     Directly Propositional
(c)

Directly Propositional     &     Directly Propositional
(d)

Directly Square Propositional     &     Directly Propositional
Answer:

Option (d)

37.

The torque-Speed (slip) curve for an induction motor gives information about the _________

(a)

variation of torque with the speed (slip).
(b)

Maximum Running torque
(c)

Starting Torque
(d)

All of these
Answer:

Option (d)

38.

Which of the following will be representing the ∅𝒔 𝑽𝒔 𝑵?

(a)

A
(b)

B
(c)

C
(d)

D
Answer:

Option (a)

39.

Which of the following will be representing the ∅𝒓  Vs  𝑵?

(a)

A
(b)

B
(c)

C
(d)

D
Answer:

Option (b)

40.

Which of the following will be representing the 𝒔𝒊𝒏𝜹  𝑽𝒔 𝑵?

 

(a)

A
(b)

B
(c)

C
(d)

D
Answer:

Option (c)

Showing 31 to 40 out of 95 Questions
1 2 3 4 5 6