Explore topic-wise MCQs in Design Electrical Machines.

This section includes 21 Mcqs, each offering curated multiple-choice questions to sharpen your Design Electrical Machines knowledge and support exam preparation. Choose a topic below to get started.

1.

The magnetizing current decreases as the number of poles is decreased.

A. true
B. false
Answer» B. false
Discussion
2.

What is the relation between the ideal short circuit current and the number of poles?

A. short circuit current is directly proportional to the number of poles
B. short circuit current is directly proportional to the square of the number of poles
C. short circuit current is indirectly proportional to the number of poles
D. short circuit current is indirectly proportional to the square of the number of poles
Answer» D. short circuit current is indirectly proportional to the square of the number of poles
Discussion
3.

What is the relation between the overload capacity and magnetizing current?

A. overload capacity is directly proportional to the magnetizing current
B. overload capacity is indirectly proportional to the magnetizing current
C. overload capacity is directly proportional to the square of the magnetizing current
D. overload capacity is indirectly proportional to the square of the magnetizing current
Answer» B. overload capacity is indirectly proportional to the magnetizing current
Discussion
4.

What is the relation between the overload capacity and dispersion coefficient?

A. overload capacity is directly proportional to the dispersion coefficient
B. overload capacity is indirectly proportional to the dispersion coefficient
C. overload capacity is directly proportional to the square of the dispersion coefficient
D. overload capacity is indirectly proportional to the square of the dispersion coefficient
Answer» C. overload capacity is directly proportional to the square of the dispersion coefficient
Discussion
5.

What is the value of the no. of poles for obtaining a dispersion coefficient = 0.5?

A. 5
B. 7
C. 10
D. 6
Answer» E.
Discussion
6.

What is the relation between the dispersion coefficient and maximum power factor?

A. dispersion coefficient is directly proportional to the power factor
B. dispersion coefficient is indirectly proportional to the power factor
C. dispersion coefficient is directly proportional to the square of the power factor
D. dispersion coefficient is indirectly proportional to the square of the power factor
Answer» C. dispersion coefficient is directly proportional to the square of the power factor
Discussion
7.

The increase in number of poles, the dispersion coefficient increases and this gives a low power factor.

A. true
B. false
Answer» B. false
Discussion
8.

What is the relation between the leakage current and power factor?

A. leakage current is directly proportional to the power factor
B. leakage current is indirectly proportional to the power factor
C. leakage current is directly proportional to the square of the power factor
D. leakage current is indirectly proportional to the square of the power factor
Answer» C. leakage current is directly proportional to the square of the power factor
Discussion
9.

WHAT_IS_THE_RELATION_BETWEEN_THE_DISPERSION_COEFFICIENT_AND_MAXIMUM_POWER_FACTOR??$

A. dispersion coefficient is directly proportional to the power factor
B. dispersion coefficient is indirectly proportional to the power factor
C. dispersion coefficient is directly proportional to the square of the power factor
D. dispersion coefficient is indirectly proportional to the square of the power factor
Answer» C. dispersion coefficient is directly proportional to the square of the power factor
Discussion
10.

What is the relation between the overload capacity and dispersion coefficient?$

A. overload capacity is directly proportional to the dispersion coefficient
B. overload capacity is indirectly proportional to the dispersion coefficient
C. overload capacity is directly proportional to the square of the dispersion coefficient
D. overload capacity is indirectly proportional to the square of the dispersion coefficient
Answer» C. overload capacity is directly proportional to the square of the dispersion coefficient
Discussion
11.

What_is_the_value_of_the_no._of_poles_for_obtaining_a_dispersion_coefficient_=_0.5?$

A. 5
B. 7
C. 10
D. 6
Answer» E.
Discussion
12.

The magnetizing current decreases as the number of poles is decreased?

A. true
B. false
Answer» B. false
Discussion
13.

What is the relation between maximum power and the number of poles?

A. maximum power factor is directly proportional to the number of poles.
B. maximum power factor is directly proportional to the square of the number of poles.
C. maximum power factor is indirectly proportional to the number of poles.
D. maximum power factor is indirectly proportional to the square of the number of poles.
Answer» D. maximum power factor is indirectly proportional to the square of the number of poles.
Discussion
14.

What is the relation between ideal short circuit current and the number of poles?

A. short circuit current is directly proportional to the number of poles.
B. short circuit current is directly proportional to the square of the number of poles.
C. short circuit current is indirectly proportional to the number of poles.
D. short circuit current is indirectly proportional to the square of the number of poles.
Answer» D. short circuit current is indirectly proportional to the square of the number of poles.
Discussion
15.

What_is_the_relation_between_the_overload_capacity_and_magnetizing_current?

A. overload capacity is directly proportional to the magnetizing current
B. overload capacity is indirectly proportional to the magnetizing current
C. overload capacity is directly proportional to the square of the magnetizing current
D. overload capacity is indirectly proportional to the square of the magnetizing current
Answer» B. overload capacity is indirectly proportional to the magnetizing current
Discussion
16.

What is the relation between the power factor and the air gap length?

A. small air gap length, dispersion coefficient increases, good power factor
B. small air gap length, dispersion coefficient decreases, bad power factor
C. small air gap length, dispersion coefficient increases, bad power factor
D. small air gap length, dispersion coefficient decreases, good power factor
Answer» E.
Discussion
17.

What is the relation between the number of poles and pole pitch with power factor?

A. number of poles increases, pole pitch increases, bad power factor
B. number of poles increases, pole pitch decreases, good power factor
C. number of poles increases, pole pitch decreases, good power factor
D. number of poles increases, pole pitch increases, bad power factor
Answer» D. number of poles increases, pole pitch increases, bad power factor
Discussion
18.

The increase in number of poles, the dispersion coefficient increases and this gives a low power factor?

A. true
B. false
Answer» B. false
Discussion
19.

What is the formula for dispersion coefficient?

A. dispersion coefficient = magnetizing current / ideal short circuit current
B. dispersion coefficient = magnetizing current * ideal short circuit current
C. dispersion coefficient = magnetizing current + ideal short circuit current
D. dispersion coefficient = magnetizing current – ideal short circuit current
Answer» B. dispersion coefficient = magnetizing current * ideal short circuit current
Discussion
20.

What is the relation between the magnetizing current and power factor?

A. magnetizing current is directly proportional to the power factor
B. magnetizing current is indirectly proportional to the power factor
C. magnetizing current is directly proportional to the square of the power factor
D. magnetizing current is indirectly proportional to the square of the power factor
Answer» B. magnetizing current is indirectly proportional to the power factor
Discussion
21.

How many factors influence the power factor of an induction motor?

A. 3
B. 2
C. 1
D. 4
Answer» C. 1
Discussion