Design of AC Machines (2170909) MCQs

MCQs of Design of Three Phase Induction Motor

Showing 11 to 20 out of 97 Questions
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11.

Size (product of 𝐷2 𝐿) of the machine depends on which of the following parameters?

(a)

Output of the machine
(b)

Output Co-efficient of the machine
(c)

Synchronous Speed of the machine
(d)

All of these
Answer:

Option (d)

12.

The output Co-efficient and Synchronous Speed of the machine are ____________  proportional to the Size (product of 𝐷2𝐿) 

(a)

Directly
(b)

Inversely 
(c)

Equally
(d)

Square
Answer:

Option (b)

13.

Which is the most important selection parameter in the design of three-phase induction motor?

(a)

Output Co-efficient of the machine
(b)

Synchronous Speed of the machine
(c)

The output of the machine
(d)

Supply frequency 
Answer:

Option (a)

14.

Size and cost of the machine will be reduced by selecting 

(a)

Lower value of Synchronous Speed of the machine
(b)

The lower value of Output Co-efficient of the machine
(c)

A higher value of Output Co-efficient & Synchronous Speed of the machine
(d)

A lower value of Output Co-efficient & Synchronous Speed of the machine
Answer:

Option (c)

15.

Which of the following parameters are considered as a disadvantage of High Output Co-efficient?

(a)

Efficiency
(b)

Temperature Rise
(c)

Power Factor
(d)

All of these 
Answer:

Option (d)

16.

Value of Output Co-efficient is/are depends on 

(a)

specific magnetic loading (𝑩𝒂𝒗)
(b)

specific electrical loading (ac)
(c)

Winding Factor (Kw)
(d)

All of these
Answer:

Option (d)

17.

Which of the following factors are affected by the selection of Specific Magnetic Loading?

(a)

Magnetizing Current
(b)

Iron Losses
(c)

Overload Capacity
(d)

All of these 
Answer:

Option (d)

18.

Which of the following is/are an advantage of selecting high Specific Electric Loading?

(a)

Size
(b)

Cost
(c)

Size & Cost
(d)

Power Factor
Answer:

Option (c)

19.

Which of the following is/are an advantage of selecting high Specific Magnetic Loading?

(a)

Size
(b)

Cost
(c)

Overload Capacity
(d)

Size, Cost & Overload Capacity
Answer:

Option (d)

20.

What is the value of Specific Magnetic loading for Normal 50 Hz three-phase induction motor design? 

(a)

0.03 - 0.06 Tesla
(b)

0.3 - 0.6 Tesla
(c)

0.45 - 0.55 Tesla
(d)

0.6 - 0.7 Tesla
Answer:

Option (b)

Showing 11 to 20 out of 97 Questions
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