Design of AC Machines (2170909) MCQs

MCQs of Design of Three Phase Induction Motor

Showing 1 to 10 out of 97 Questions
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1.

Design of the electrical machine is/are carried out to find

(a)

dimensions of machine parts
(b)

material specification
(c)

detailed drawings
(d)

all of these
Answer:

Option (d)

2.
Which of the following is considered as the best design?
(a) Highest Efficiency
(b) Highest efficiency with minimum cost
(c) Highest efficiency, the minimum cost with a minimum volume
(d) Highest efficiency, the minimum cost, a minimum volume with minimum maintenance
Answer:

Option (d)

3.
What are the factors which are employed in the engineering design?
(a) application of science
(b) application of science and technology
(c) application of science and innovation
(d) application of science, technology, and innovation
Answer:

Option (d)

4.

What is the condition of good design?

(a)

machine having operating life of 5-10 years
(b)

machine having operating life of 10-15 years
(c)

machine having operating life of 15-20 years
(d)

machine having operating life of 20-30 years
Answer:

Option (d)

5.

How does the saturation levels limit the design?

(a)

saturation levels decrease the flux density
(b)

saturation levels increase the flux density
(c)

saturation levels provide no flux density
(d)

saturation levels provide very high flux density
Answer:

Option (d)

6.

What is the relationship between efficiency and operating costs?

(a)

efficiency is directly proportional to the square of the operating cost
(b)

efficiency is directly proportional to the operating costs
(c)

efficiency is Inverse proportion to the operating costs
(d)

efficiency is Inverse proportion to the square of the operating costs
Answer:

Option (c)

7.

Which of the following is not covered in the DESIGN OF THREE PHASE INDUCTION MOTOR?

(a)

Main Dimensions
(b)

Stator & Rotor Design
(c)

Design of submersible motors
(d)

Design of Turbo Alternator
Answer:

Option (d)

8.

What are the factors which are considered when the optimal solution involves iterations wherein the values of variables are changed?

(a)

performance
(b)

cost constraint
(c)

performance or cost constraint
(d)

performance and cost constraint
Answer:

Option (d)

9.

Which of the following is not an output equation of three-phase induction motor?

(a)

Q=C0 D2L ns
(b)

Q=(1.11 π2 Kw Bav ac 10-3)  D2L ns
(c)

Q=3 C0 D2L ns
(d)

Q=(11 Kw Bav ac 10-3)  D2L ns
Answer:

Option (c)

10.

What is the phase spread of winding in 3-phase Induction motor?

(a)

60
(b)

90
(c)

120
(d)

180
Answer:

Option (a)

Showing 1 to 10 out of 97 Questions
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