Explore topic-wise MCQs in Electrical Engineering Questions.

This section includes 90 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.

51.

Which of the following methods is used for laying of underground cables ?
A. Direct laying
B. Draw-in-system
C. Solid system
D. All of the above
Answer» E.
Discussion
52.

Which of the following is the demerit of a ‘constant voltage transmission system’ ?
A. Increase of short-circuit current of the system
B. Availability of steady voltage at all loads at the line terminals
C. Possibility of better protection for the line due to possible use of higher terminal reactants
D. Improvement of power factor at times of moderate and heavy loads
E. Possibility of carrying increased power for a given conductor size in case of long-distance heavy power transmission
Answer» B. Availability of steady voltage at all loads at the line terminals
Discussion
53.

The phenomenon qf rise in voltage at the receiving end of the open-circuited or lightly loaded line is called the________________?
A. Seeback effect
B. Ferranti effect
C. Raman effect
D. none of the above
Answer» C. Raman effect
Discussion
54.

The operating voltage of extra high tension cables is upto_______________?
A. 6.6 kV
B. 11 kV
C. 33 kV
D. 66 kV
E. 132 kV
Answer» E. 132 kV
Discussion
55.

The operating voltage of high voltage cables is up to_______________?
A. l.lkV
B. 3.3kV
C. 6.6kV
D. llkV
Answer» E.
Discussion
56.

The operating voltage of supertension cables is up to_________________?
A. 3.3 kV
B. 6.6 kV
C. 11 kV
D. 33 kV
Answer» E.
Discussion
57.

In the analysis of which of the following lines shunt capacitance is neglected?
A. Short transmission lines
B. Medium transmission lines
C. Long transmission lines
D. Medium as well as long transmission lines
Answer» B. Medium transmission lines
Discussion
58.

The square root of the ratio of line impedance and shunt admittance is called the___________?
A. surge impedance of the line
B. conductance of the line
C. regulation of the line
D. none of the above
Answer» B. conductance of the line
Discussion
59.

On which of the following factors skin effect depends?
A. Frequency of the current
B. Size of the conductor
C. Resistivity of the conductor material
D. All of the above
Answer» E.
Discussion
60.

The voltage regulation in magnetic amplifier type voltage regulator is effected by__________?
A. electromagnetic induction
B. varying the resistance
C. varying the reactance
D. variable transformer
Answer» D. variable transformer
Discussion
61.

310 km line is considered as_______________?
A. a long line
B. a medium line
C. a short line
D. any of the above
Answer» B. a medium line
Discussion
62.

The effect of corona can be detected by___________?
A. presence of ozone detected by odour
B. hissing sound
C. faint luminous glow of bluish colour
D. all of the above
Answer» E.
Discussion
63.

In a tap changing transformer, the tappings are provided on__________?
A. primary winding
B. secondary winding
C. high voltage winding
D. any of the above
Answer» D. any of the above
Discussion
64.

The skin effect of a conductor will reduce as the__________?
A. resistivity of conductor material increases
B. permeability of conductor material increases
C. diameter increases
D. frequency increases
Answer» B. permeability of conductor material increases
Discussion
65.

Constant voltage transmission entails the following disadvantage?
A. large conductor area is required for same power transmission
B. short-circuit current of the system is increased
C. either of the above
D. none of the above
Answer» C. either of the above
Discussion
66.

Electro-mechanical voltage regulators are generally used in___________?
A. reactors
B. generators
C. transformers
D. all of the above
Answer» C. transformers
Discussion
67.

The steel used in steel cored conductors is usually__________?
A. alloy steel
B. stainless steel
C. mild steel
D. high speed steel
E. all of the above
Answer» D. high speed steel
Discussion
68.

For aluminium, as compared to copper, all the following factors have higher values except:
A. specific volume
B. electrical conductivity
C. co-efficient of linear expansion
D. resistance per unit length for same cross-section
Answer» C. co-efficient of linear expansion
Discussion
69.

When a conductor carries more current on the surface as compared to core, it is due to___________?
A. permeability variation
B. corona
C. skin effect
D. unsymmetrical fault
E. none of the above
Answer» D. unsymmetrical fault
Discussion
70.

The following system is not generally used?
A. 1-phase 3 wire
B. 1-phase 4 wire
C. 3-phase 3 wire
D. 3-phase 4 wire
Answer» B. 1-phase 4 wire
Discussion
71.

When an alternator connected to the bus-bar is shut down the bus-bar voltage will___________?
A. fall
B. rise
C. remain unchanged
D. none of the above
Answer» D. none of the above
Discussion
72.

Series capacitors on transmission lines are of little use when the load VAR requirement is___________?
A. large
B. small
C. fluctuating
D. any of the above
Answer» C. fluctuating
Discussion
73.

A conductor, due to sag between two supports, takes the form of____________?
A. semi-circle
B. triangle
C. ellipse
D. catenary
Answer» E.
Discussion
74.

The angular displacement between two interconnected stations is mainly due to___________?
A. armature reactance of both alternators
B. reactance of the interconnector
C. synchronous reactance of both the alternators
D. all of the above
Answer» B. reactance of the interconnector
Discussion
75.

Which of the following are the constants of the transmission lines ?
A. Resistance
B. Inductance
C. Capacitance
D. All of the above
Answer» E.
Discussion
76.

Which of the following characteristics should the line supports for transmission lines possess?
A. Low cost
B. High mechanical strength
C. Longer life
D. All of the above
Answer» E.
Discussion
77.

Which of the following relays is used on long transmission lines?
A. Impedance relay
B. Mho’s relay
C. Reactance relay
D. None of the above
Answer» C. Reactance relay
Discussion
78.

Aluminium has a specific gravity of___________?
A. 1.5
B. 2.7
C. 4.2
D. 7.8
Answer» C. 4.2
Discussion
79.

Transmission voltage of 11 kV is normally used for distances up to_____km?
A. 20—25 km
B. 40—50 km
C. 60—70 km
D. 80—100 km
Answer» B. 40—50 km
Discussion
80.

When the interconnector between two stations has large reactance?
A. the transfer of power will take place with voltage fluctuation and noise
B. the transfer of power will take place with least loss
C. the stations will fall out of step be¬cause of large angular displacement between the stations
D. none of the above
Answer» D. none of the above
Discussion
81.

Which of the following distribution systems is more reliable?
A. Radial system
B. Tree system
C. Ring main system
D. All are equally reliable
Answer» D. All are equally reliable
Discussion
82.

For transmission of power over a distance of 200 km, the transmission voltage should be_________kv?
A. 132 kV
B. 66 kV
C. 33 kV
D. 11 kV
Answer» B. 66 kV
Discussion
83.

The frequency of voltage generated, in case of generators, can be increased by___________?
A. using reactors
B. increasing the load
C. adjusting the governor
D. reducing the terminal voltage
E. none of the above
Answer» D. reducing the terminal voltage
Discussion
84.

By which of the following a bus-bar is rated?
A. Current only
B. Current and voltage
C. Current, voltage and frequency
D. Current, voltage, frequency and short time current
Answer» E.
Discussion
85.

In aluminium conductors, steel core is provided to____________?
A. compensate for skin effect
B. neutralise proximity effect
C. reduce line inductance
D. increase the tensile strength
Answer» E.
Discussion
86.

_______________are the conductors, which connect the consumer’s terminals to the distribution?
A. Distributors
B. Service mains
C. Feeders
D. None of the above
Answer» C. Feeders
Discussion
87.

When a live conductor of public electric supply breaks down and touches the earth which of the following will happen?
A. Current will flow to earth
B. Supply voltage will drop
C. Supply voltage will increase
D. No current will flow in the conductor
E. None of the above
Answer» B. Supply voltage will drop
Discussion
88.

The underground system cannot be operated above_________________?
A. 440 V
B. 11 kV
C. 33 kV
D. 66 kV
Answer» E.
Discussion
89.

The corona is considerably affected by which of the following _______________?
A. Size of the conductor
B. Shape of the conductor
C. Surface condition of the conductor
D. All of the above
Answer» E.
Discussion
90.

By which of the following systems electric power may be transmitted ?
A. Overhead system
B. Underground system
C. Both A. and (b)
D. None of the above
Answer» D. None of the above
Discussion