Design of AC Machines (2170909) MCQs

MCQs of Design of Three Phase Induction Motor

Showing 41 to 50 out of 97 Questions
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41.

While designing a three-phase induction motor. To keep Iron Losses & Magnetizing MMF within the limit. Flux density in the Stator Core should not exceed the ______ Wb/m2 

(a)

1.1 to 1.4
(b)

1.5
(c)

1.1 to 1.7
(d)

1.7
Answer:

Option (b)

42.

While designing a three-phase induction motor. What is the permissible limit of core flux density?

(a)

1.7
(b)

1.1 to 1.7
(c)

1 to 1.8
(d)

1.1 to 1.4
Answer:

Option (d)

43.

Flux in the stator core section ∅𝒄 = ________

(a)

∅π’Ž
(b)

0.5 ∅π’Ž
(c)

1.5 ∅π’Ž
(d)

Any of these
Answer:

Option (b)

44.

While designing a three-phase induction motor. The outer diameter of the stator core can be calculated as

(a)

π‘«πŸŽ = 𝑫 + 𝑫𝒆𝒑𝒕𝒉 𝒐𝒇 𝑺𝒕𝒂𝒕𝒐𝒓 𝑺𝒍𝒐𝒕 + 𝑫𝒆𝒑𝒕𝒉 𝒐𝒇 π‘ͺ𝒐𝒓𝒆
(b)

π‘«πŸŽ = 𝑫 + 𝟐 (𝑫𝒆𝒑𝒕𝒉 𝒐𝒇 𝑺𝒕𝒂𝒕𝒐𝒓 𝑺𝒍𝒐𝒕 + 𝑫𝒆𝒑𝒕𝒉 𝒐𝒇 π‘ͺ𝒐𝒓𝒆)
(c)

π‘«πŸŽ = 𝑫 + 𝟐 (2 𝑫𝒆𝒑𝒕𝒉 𝒐𝒇 𝑺𝒕𝒂𝒕𝒐𝒓 𝑺𝒍𝒐𝒕 + 2 𝑫𝒆𝒑𝒕𝒉 𝒐𝒇 π‘ͺ𝒐𝒓𝒆)
(d)

None of these
Answer:

Option (b)

45.

While designing a three-phase induction motor. __________ must be check before finally deciding the dimensions of the rotor Slot.

(a)

Rotor Tooth Width
(b)

Rotor Minimum Tooth Width
(c)

Total nos of Rotor Slot
(d)

Rotor Slot Width
Answer:

Option (b)

46.

In the design of a three-phase induction motor.Flux density in the Rotor Teeth is depended on the ___________.

(a)

Rotor Tooth Width at the root
(b)

Rotor Tooth Height
(c)

Rotor Core Length
(d)

Rotor Core Depth
Answer:

Option (a)

47.

While designing a three-phase induction motor. To keep Iron Losses & Magnetizing MMF within the limit. Flux density in the Rotor Teeth should not exceed the ______ Wb/m2.

(a)

1.1
(b)

1.1 to 1.7
(c)

1.5
(d)

1.7
Answer:

Option (d)

48.

Can we select rotor flux density slightly higher than stator flux density?

(a)

Yes 
(b)

No 
Answer:

Option (a)

49.

What if the rotor tooth width increase beyond a certain value?

(a)

Slot width became narrow
(b)

deep slots required to accommodate conductor/slot
(c)

leakage reactance increased
(d)

All of these
Answer:

Option (d)

50.

In the design of a three-phase induction motor. Flux density in the Rotor core is depended on the ___________.

(a)

Tooth Width
(b)

Tooth Height
(c)

Rotor Core Length
(d)

Rotor Core Depth
Answer:

Option (d)

Showing 41 to 50 out of 97 Questions
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