Explore topic-wise MCQs in Design Electrical Machines.

This section includes 28 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 ratio of active conductor section to total conductor section is called space factor.

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

Parallax comes under _____ error.

A. personal
B. natural
C. instrumental
D. personal and natural
Answer» B. natural
Discussion
3.

Manipulating wrong tangent screw comes under _____ error.

A. personal
B. natural
C. instrumental
D. personal and natural
Answer» B. natural
Discussion
4.

Slip comes under _____ error.

A. personal
B. natural
C. instrumental
D. personal and natural
Answer» B. natural
Discussion
5.

Inaccurate levelling comes under ______ error.

A. personal
B. natural
C. instrumental
D. personal and natural
Answer» B. natural
Discussion
6.

Which of the following errors can be eliminated by a method of repetition?i) errors due to eccentricity.ii) errors due to in adjustments of line of collimation.iii) error due to inaccurate graduations.iv) error due to inaccurate bisection of the object.

A. i only
B. i and ii
C. i, ii and 3
D. i, ii, iii and iv
Answer» E.
Discussion
7.

SLIP_COMES_UNDER_______ERROR.?$

A. personal
B. natural
C. instrumental
D. personal and natural
Answer» B. natural
Discussion
8.

Parallax comes under _____ error.$

A. personal
B. natural
C. instrumental
D. personal and natural
Answer» B. natural
Discussion
9.

Manipulating_wrong_tangent_screw_comes_under_______error.$

A. personal
B. natural
C. instrumental
D. personal and natural
Answer» B. natural
Discussion
10.

Unequal expansion of parts of telescope comes under _____ source of error.

A. personal
B. natural
C. instrumental
D. personal and natural
Answer» C. instrumental
Discussion
11.

Unequal settlement of tripod comes under ____ source of error.

A. personal
B. natural
C. instrumental
D. personal and natural
Answer» C. instrumental
Discussion
12.

Un equal atmospheric refraction due to high temperature comes under which sources of errors?

A. Personal
B. Natural
C. Instrumental
D. Personal and natural
Answer» C. Instrumental
Discussion
13.

Inaccurate bisection of points observed comes under _____ error.

A. personal
B. natural
C. instrumental
D. personal and natural
Answer» B. natural
Discussion
14.

Inaccurate levelling comes under ______ error?

A. personal
B. natural
C. instrumental
D. personal and natural
Answer» B. natural
Discussion
15.

The ratio of active conductor section to total conductor section is called space factor?

A. true
B. false
Answer» B. false
Discussion
16.

Error due to in accurate centering comes under ________ error.

A. personal
B. natural
C. instrumental
D. personal and natural
Answer» B. natural
Discussion
17.

What is the formula of the ratio error in the current transformers?

A. ratio error = turns ratio – regulation / regulation
B. ratio error = turns ratio + regulation / regulation
C. ratio error = turns ratio * regulation / regulation
D. ratio error = 1 / turns ratio * regulation
Answer» B. ratio error = turns ratio + regulation / regulation
Discussion
18.

Error due to the line of collimation not being perpendicular to the horizontal axis comes under ________ error.

A. personal
B. natural
C. instrumental
D. personal and natural
Answer» D. personal and natural
Discussion
19.

What is the formula of the phase angle of the secondary load circuit?

A. phase angle of secondary load circuit = tan-1 * (reactance of the external burden/resistance of the external burden)
B. phase angle of secondary load circuit = tan-1 * (reactance of the external burden + resistance of the external burden)
C. phase angle of secondary load circuit = tan-1 * (reactance of the external burden – resistance of the external burden)
D. phase angle of secondary load circuit = tan-1 * (reactance of the external burden * resistance of the external burden)
Answer» B. phase angle of secondary load circuit = tan-1 * (reactance of the external burden + resistance of the external burden)
Discussion
20.

Error due to imperfections due to wear comes under ________ error.

A. personal
B. natural
C. instrumental
D. personal and natural
Answer» D. personal and natural
Discussion
21.

What is the formula of the angle between secondary induced voltage and secondary current?

A. phase angle = tan-1 *[(reactance of the secondary winding – reactance of the external burden) / (resistance of the secondary winding + resistance of the external burden)].
B. phase angle = tan-1 *[(reactance of the secondary winding – reactance of the external burden) / (resistance of the secondary winding – resistance of the external burden)].
C. phase angle = tan-1 *[(reactance of the secondary winding * reactance of the external burden) / (resistance of the secondary winding + resistance of the external burden)].
D. phase angle = tan-1 *[(reactance of the secondary winding + reactance of the external burden) / (resistance of the secondary winding + resistance of the external burden)].
Answer» E.
Discussion
22.

Error due to structural defects in the instrument comes under ________ error.

A. personal
B. natural
C. instrumental
D. personal and natural
Answer» D. personal and natural
Discussion
23.

How many types of errors are present in the current transformers?

A. 1
B. 2
C. 3
D. 4
Answer» C. 3
Discussion
24.

Error due to imperfect adjustment of plate levels comes under ________ error.

A. personal
B. natural
C. instrumental
D. personal and natural
Answer» D. personal and natural
Discussion
25.

What is the definition of the ideal current transformer?

A. the primary and secondary windings are in exact ratio and same phase relationship
B. the primary winding and secondary winding ratio is greater than 1 and same phase relationship
C. the primary and secondary winding ratio is lesser than 1 are in exact ratio and different phase relationship
D. the primary and secondary windings ratio is greater than 1 and different phase relationship
Answer» B. the primary winding and secondary winding ratio is greater than 1 and same phase relationship
Discussion
26.

Sources of errors in transit work are broadly classified into ______ types.

A. 2
B. 3
C. 4
D. 5
Answer» C. 4
Discussion
27.

How many classifications are present for the current transformers?

A. 1
B. 2
C. 3
D. 4
Answer» C. 3
Discussion
28.

What is the definition of current transformer?

A. it is used for measuring high voltage
B. it is used for measuring low voltage
C. it is used for measuring high current
D. it is used for measuring low current
Answer» D. it is used for measuring low current
Discussion