Explore topic-wise MCQs in Electrical Engineering Questions.

This section includes 147 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.

101.

Which among the following information is required for a good estimation? i. Availability of products ii. Sources of production, vendor selection iii. New products and their quality iv. Prices and the discounts provided for each product

A. i and ii
B. ii, iii and iv
C. i, ii, iii and iv
D. only iv
Answer» D. only iv
Discussion
102.

What will be the utilisation factor for an indirect lighting scheme?

A. 0.25 – 0.5
B. 0.5 – 0.75
C. 0.1 – 0.25
D. 0.75 – 0.99
Answer» D. 0.75 – 0.99
Discussion
103.

What will be the maximum leakage current, if a domestic installation uses 20 points of 40 watt lamps and 5 fans of 100 watts each? Use voltage = 240 V

A. 0.002 A
B. 0.0011 A
C. 0.003 A
D. 0.005 A
Answer» C. 0.003 A
Discussion
104.

What type of earthing is used by transmission lines?

A. Plate earthing
B. Rod earthing
C. Strip earthing
D. Both (a) & (c)
E. All of these
Answer» D. Both (a) & (c)
Discussion
105.

What should be the spacing between the two conductors if the working voltage is 11 kV?

A. 76 mm
B. 101 mm
C. 190 mm
D. 250 mm
Answer» C. 190 mm
Discussion
106.

What should be the minimum insulation resistance of a 11 kV line when tested with a 1000 v Megger?

A. 10 kV
B. 50 kV
C. 33 kV
D. 120 kV
Answer» C. 33 kV
Discussion
107.

What should be the insulation resistance in case of PVC wires?

A. 12.5 MΩ / number of outlet
B. 82.5 MΩ / number of outlet
C. 2.5 MΩ / number of outlet
D. 10.5 MΩ / number of outlet
Answer» B. 82.5 MΩ / number of outlet
Discussion
108.

What should be the minimum clearance for laying power cables near communication lines?

A. 0.2 m horizontally and vertically
B. 0.6 m horizontally and vertically
C. 1 m horizontally and vertically
D. 1.5 m horizontally and vertically
Answer» C. 1 m horizontally and vertically
Discussion
109.

What should be the height of the ‘Roof Pole’?

A. Less than 5m
B. Less than 3m
C. More than 3m
D. More than 10m
Answer» C. More than 3m
Discussion
110.

What percentage is the stock incidental charge?

A. 10 %
B. 5 %
C. 12 %
D. 2 %
Answer» C. 12 %
Discussion
111.

What is the specification of GI earth plate?

A. 60 cm * 60 cm * 3 mm
B. 60 cm * 60 cm * 6 mm
C. 60 cm * 60 cm * 4 mm
D. 60 cm * 60 cm * 5 mm
Answer» C. 60 cm * 60 cm * 4 mm
Discussion
112.

What is the size of the cable made up of copper conductors used for a 10 hp 500 V DC motor?

A. 7 / 0.915 mm
B. 1 / 2.8 mm
C. 3 / 0.915 mm
D. Both (b) & (c)
E. All of these
Answer» B. 1 / 2.8 mm
Discussion
113.

What is the reason for excess reading of the energy meter?

A. Defective wiring
B. Meter defects
C. Over voltage
D. Both (A) & (B)
E. All of these
Answer» E. All of these
Discussion
114.

What is the normal life of a fluorescent lamp?

A. 2000 hours
B. 3500 hours
C. 7500 hours
D. 10000 hours
Answer» D. 10000 hours
Discussion
115.

What is the multiplication factor used for the determination of maximum current carrying capacity of an 11 kV line?

A. 0.88
B. 0.95
C. 0.9
D. 0.8
Answer» D. 0.8
Discussion
116.

What is the maximum voltage that XLPE cables can withstand?

A. 65 ° C
B. 80 ° C
C. 110 ° C
D. 130 ° C
Answer» E.
Discussion
117.

What is the maximum span upto which the wooden poles can be used?

A. 20 m
B. 50 m
C. 60 m
D. 100 m
Answer» D. 100 m
Discussion
118.

What is the maximum number of lighting points that can be connected in a circuit?

A. 5
B. 10
C. 8
D. 12
Answer» C. 8
Discussion
119.

What is the maximum load that can be connected in a circuit connecting only lighting points?

A. 500 watts
B. 750 watts
C. 800 watts
D. 1000 watts
Answer» D. 1000 watts
Discussion
120.

What is the maximum load that is permitted in a power circuit?

A. 5000 watts
B. 3000 watts
C. 2000 watts
D. 10000 watts
Answer» C. 2000 watts
Discussion
121.

What is the maximum length of the flexible conduit in motor installation?

A. Less than 1.25 m
B. Less than 2.25 m
C. Less than 3.5 m
D. Can exceed not more than 5 m.
Answer» B. Less than 2.25 m
Discussion
122.

What is the maximum distance between the two successive cleats?

A. 0.25 m
B. 0.6 m
C. 0.9m
D. 1.25 m
Answer» C. 0.9m
Discussion
123.

What is the input current of a 2 hp single phase motor, 240 V at 70 % efficiency and 0.8 power factor?

A. 6.95 A
B. 10.95 A
C. 13.52 A
D. 17.68 A
Answer» C. 13.52 A
Discussion
124.

What is the formula to calculate the number of poles required in LT line distribution?

A. Length / Span + 1
B. Length / Span + 10
C. Span / Length + 1
D. Span / Length + 10
Answer» B. Length / Span + 10
Discussion
125.

What is the factor of safety used for current ratings in a power installation?

A. 1
B. 1.5
C. 1.75
D. 2
Answer» E.
Discussion
126.

What is the empirical formula employed for the determination of spacing of conductors in case of aluminium conductors?

A. √S + V / 100
B. √S + 120 / V
C. √S + V / 150
D. √S + V / 1 kV
Answer» D. √S + V / 1 kV
Discussion
127.

What is the dimension of the copper strips used for the strip earthing?

A. 25 mm * 4 mm
B. 25 mm * 3 mm
C. 30 mm * 4 mm
D. 30 mm * 3 mm
Answer» B. 25 mm * 3 mm
Discussion
128.

What is the dielectric constant of impregnated paper insulation?

A. 3.5
B. 2.5
C. 4.3
D. 3.8
Answer» B. 2.5
Discussion
129.

What is the diameter of the GI pipe through which the earth wire needs to be taken out?

A. 13 mm diameter
B. 15 mm diameter
C. 19 mm diameter
D. 6 mm diameter
Answer» B. 15 mm diameter
Discussion
130.

What is the angle between the pole and stay?

A. 30 °
B. 45 °
C. 60 °
D. 10 °
Answer» B. 45 °
Discussion
131.

What is the amount of charcoal and salt needed for GI Pipe earthing?

A. Charcoal 5 kg, salt 8 kg
B. Charcoal 10 kg, salt 8 kg
C. Charcoal 10 kg, salt 10 kg
D. Charcoal 5 kg, salt 5 kg
Answer» D. Charcoal 5 kg, salt 5 kg
Discussion
132.

What is meant by petty purchase?

A. An item purchased from market by purchase assistant with proper formal order.
B. An item purchased from market by purchase assistant without proper formal order.
C. A single tendering purchase
D. None of these
Answer» C. A single tendering purchase
Discussion
133.

What is meant by contingencies?

A. The list of required components are included in this category
B. The list of vague and unforeseen items is included in this category
C. The list of components along with their discounted price is included in this category
D. Both (A) and (C)
E. None of these
Answer» C. The list of components along with their discounted price is included in this category
Discussion
134.

What is an electrical schedule?

A. A list or a plan of a building providing information of number of points in each room.
B. The list of all the electrical components required for a particular room
C. The list of electrical components along with their prices
D. Both (B) and (C)
E. None of these
Answer» B. The list of all the electrical components required for a particular room
Discussion
135.

What does section 44 refer to?

A. Penalty for interference with meters
B. Penalty for illegal transmission or use of energy
C. Penalty for maliciously wasting energy
D. Theft of energy
Answer» B. Penalty for illegal transmission or use of energy
Discussion
136.

What are the types of conduits available?

A. PVC conduit
B. Flexible conduit
C. Heavy gauge steel screwed conduit
D. All of these
E. None of these
Answer» E. None of these
Discussion
137.

To prevent the decaying owing to snow and rain, the wooden poles are protected by _____________ cap at the top.

A. Aluminium
B. Zinc
C. Cement
D. All of these
E. None of these
Answer» E. None of these
Discussion
138.

The leakage current must not be more than ____________ of maximum supply current

A. 1 / 1000
B. 1 / 100
C. 1 / 5000
D. 1 / 500
Answer» D. 1 / 500
Discussion
139.

If the measured insulation value is more than unity what value should be taken as the maximum working value?

A. 0.75 MΩ
B. One MΩ
C. 0.5 MΩ
D. One ohm
Answer» C. 0.5 MΩ
Discussion
140.

How many outlets are permitted in a power circuit?

A. 10 points
B. 5 points
C. 2 points
D. 1 point
Answer» D. 1 point
Discussion
141.

How is the ballast resistance connected with the choke?

A. Parallel
B. Series
C. Can be connected in either way
D. Both (a) & (b)
E. None of these
Answer» C. Can be connected in either way
Discussion
142.

For what voltage levels are the screwed conduit circuits used?

A. Less than 250 V
B. For voltages between 250 V – 600 V
C. For voltages above 600 V
D. None of these
Answer» C. For voltages above 600 V
Discussion
143.

For what voltage is the H type of poles used?

A. 22 kV
B. 130 kV
C. 11 kV
D. All of these
E. None of these
Answer» C. 11 kV
Discussion
144.

For what range is the underground service lines used?

A. Distance more than 25 m
B. Distance more than 100 m
C. Distance less than 1 km
D. Distance more than 1 km
Answer» B. Distance more than 100 m
Discussion
145.

Branch circuit must not feed more than __________ points.

A. 12
B. 5
C. 10
D. 8
Answer» D. 8
Discussion
146.

Beyond what temperature does the gas vaporise and blackens the lamp in a gas filled lamp?

A. 550 ° C
B. 2000 ° C
C. 1000 ° C
D. 3000 ° C
Answer» C. 1000 ° C
Discussion
147.

At what temperature value is the insulation resistance corrected if it is measured to be different?

A. 30 ° C
B. 25 ° C
C. 22 ° C
D. 15 ° C
Answer» C. 22 ° C
Discussion