Design of AC Machines (2170909) MCQs

MCQs of Design of Single-Phase Induction Motors

Showing 41 to 50 out of 56 Questions
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41.

In the design of single-phase induction motor. What is the range of the stator winding factor for the usual windings distribution?

(a)

0.70-0.80
(b)

0.70-0.85
(c)

 0.70-0.90
(d)

 0.75-0.85
Answer:

Option (d)

42.

In the design of single-phase induction motor. The value of the stator induced voltage = __________ the supply voltage.

(a)

0.75
(b)

0.80
(c)

0.85
(d)

0.95
Answer:

Option (d)

43.

In the design of single-phase induction motor. What is the formula of the maximum flux in the running winding?

(a)

maximum flux = flux * pole
(b)

maximum flux = flux/pole
(c)

maximum flux = flux / turns
(d)

maximum flux = flux * turns
Answer:

Option (b)

44.

In the main winding design of single-phase induction motor. The current density π›Ώπ‘š  is taken between __________ . 

(a)

1 - 4  A/mm2
(b)

2 - 4  A/mm2
(c)

3 - 4  A/mm2
(d)

4 - 7  A/mm2
Answer:

Option (c)

45.

What is the relation of the number of slots with the leakage reactance?

(a)

small number of slots, high leakage reactance
(b)

large number of slots, high leakage reactance
(c)

large number of slots, small leakage reactance
(d)

small number of slots, small leakage reactance
Answer:

Option (c)

46.

In the design of single-phase induction motor. The number of stator slots per pole is usually between _______________

(a)

6 and 9
(b)

9 and 12
(c)

12 and 15
(d)

8 and 14
Answer:

Option (b)

47.

In the design of single-phase induction motor. __________ slots are usually used with a slot liner __________ thick

(a)

closed,     0.3 to 0.4 mm
(b)

Semi-enclosed tapered,     0.3 to 0.4 mm
(c)

open,     0.3 to 0.4 mm
(d)

Any of these 
Answer:

Option (b)

48.

In the design of single-phase induction motor. Space factor must not exceed _______.

(a)

0.3
(b)

0.35
(c)

0.4
(d)

0.5
Answer:

Option (d)

49.

In the design of single-phase induction motor. Minimum slot area required

(a)

𝑨𝒔 =  (𝒁𝒔 × π…/πŸ’ × π’…i𝟐) / Space factor 
(b)

𝑨𝒔 =  𝒁𝒔 × π…/πŸ’ × π’…i𝟐  × Space factor 
(c)

𝑨𝒔 =  𝒁𝒔 × π…/πŸ’ × π’…πŸ  × Space factor 
(d)

𝑨𝒔 =  (𝒁𝒔 × π…/πŸ’ × π’…πŸ) / Space factor 
Answer:

Option (a)

50.

In the design of single-phase induction motor. The slot area provided in the punching (stamping) should be__________ the minimum calculated area.

(a)

 more than
(b)

less than
(c)

equal to 
(d)

2 times
Answer:

Option (a)

Showing 41 to 50 out of 56 Questions
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