Electrical Machine - II (3150910) MCQs

MCQs of Induction Machines

Showing 51 to 60 out of 95 Questions
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51.

𝑷𝑨𝑮 : 𝑷𝒄𝒖𝒓  (Airgap power : Rotor copper loss) is given by 

(a)

1:s
(b)

1:(1-s)
(c)

s:(1-s)
(d)

(1-s)
Answer:

Option (a)

52.

𝑷𝑨𝑮 : 𝑷𝒅 (Airgap power : mechanical power devloped) is given by 

(a)

1:s
(b)

1:(1-s)
(c)

s:(1-s)
(d)

(1-s)
Answer:

Option (b)

53.

In Induction motor the energy is transferred via the __________ & entirely __________ .

(a)

Air Gap & Inductively + Conductivity
(b)

Core & Conductivity
(c)

Air Gap & Conductivity
(d)

Air Gap & Inductively
Answer:

Option (d)

54.

At __________ & _________ Condition, Induction Motor is analogous to static & rotating transformer with an air gap & short-circuited secondary respectively.

(a)

Standstill   &   Running
(b)

Running   &   Standstill 
(c)

Running   &   Running
(d)

Standstill   &   Standstill 
Answer:

Option (a)

55.

No-load current in Induction Motor is Very _________ due to presence of an __________ .

(a)

Small  &  Core
(b)

Large  &  Core
(c)

Small  &  Air-gap
(d)

Large  &  Air-gap
Answer:

Option (d)

56.

Which of the following is the equivalent circuit of Three-Phase Induction Motor? 

(a)

A
(b)

B
(c)

C
(d)

D
Answer:

Option (a)

57.

Which of the following is the approximate equivalent circuit of Three-Phase Induction Motor? 

(a)

A
(b)

B
(c)

C
(d)

D
Answer:

Option (d)

58.

Following is the Vector Diagram of _______________ . 

(a)

Three-Phase Induction Motor
(b)

Three-Phase Transformer with Resistive Load
(c)

Three-Phase Transformer with Inductive Load Load
(d)

Single-Phase Induction Motor
Answer:

Option (a)

59.

Any deviation from the perfect _______________ in terms of _______________ is known as unbalance (voltage or current ).

(a)

sinusoidal waveform,       magnitude
(b)

sinusoidal waveform,       phase shift
(c)

RMS value,       phase shift
(d)

sinusoidal waveform,       magnitude and/or phase shift
Answer:

Option (d)

60.

Balanced Voltage magnitude & phase shift in three-phase induction machine means, ___________ & __________ respectively

(a)

Equal RMS value of all phases   &   Equal phase shift (120˚) between any phases
(b)

Equal Peak value of all phases   &   Equal phase shift (120˚) between all phases
(c)

Equal DC value of all phases   &   Equal phase shift (180˚) between all phases
(d)

Equal Peak value of all phases   &   Equal phase shift (180˚) between all phases
Answer:

Option (b)

Showing 51 to 60 out of 95 Questions
3 4 5 6 7 8