| Post Name | Electrician/Electrical Helper/Lineman |
|---|---|
| Question Paper Code | 055/2026 |
| Category Code | 464/2025, 465/2025, 556/2025, 634/2025, 741/2025, 776/2025 |
| Date of Test | 10 June 2026 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Which of the following statement is false? 1. Metals are good electric conductors. 2. Electrons flow from negative terminal to positive terminal. 3. Conventional current flow is assumed as negative to positive. 4. Copper is more conductive than silver.
Answer
B. Only 3 & 4
2
If ____________ electrons per second pass through a conductor having one ohm resistance with a potential difference of one volt causes one ampere current. 18 23
Answer
A. 6.24 × 10
3
The electron configuration of a copper atom is :
Answer
B. 2, 8, 18, 1
4
Soldering of copper conductors is more difficult than soldering of Aluminium conductor.
Answer
D. 2, 3, 4
5
Which of the following statement is true? 1. On molten solder due to repeated melting Lead content is reduced. 2. On molten solder due to repeated melting Tin content is reduced. 3. Dip soldering is used for quantity production and for tinning work. 4. Soldering of copper conductors is more difficult than soldering of Aluminium conductor.
Answer
C. 2,3
6
Normal current carrying capacity of 1.5 sq mm copper cable = 16 amps (normal rating), current carrying capacity of the same cable when protected by coarse excess current protection is :
Answer
A. 12.96 amps
7
The number of valence electrons in Si and Ge are _____________ respectively.
Answer
C. 4 and 4
8
For a semiconductor :
Answer
C. Resistance decreases with increase in temperature
9
Two wires of equal length and equal resistance, the ratio of their cross sectional area is 3:5.Then the ratio of their specific resistances will be :
Answer
D. 3:5
10
Which is provided above the metallic sheath in UG Cable?
Answer
B. Bedding
11
The specific resistance of a substance depends on :
Answer
C. Its kind of material
12
Kirchoff's current law is applicable to only :
Answer
A. Junctions in a network
13
With rise in temperature the resistance of pure metals :
Answer
A. Increases
14
A lead acid cell is rechargeable because :
Answer
C. Its chemical action is reversible
15
What is the output voltage of Lithium cell?
Answer
D. 2.5 V
16
What is the Electro Chemical Equivalent of copper?
Answer
A. 0.329 mg/coulomb
17
What is the resistance of Light Dependent Resistor, if the intensity of light is increased?
Answer
B. Decreases
18
Sedimentation in lead acid batteries occurs due to :
Answer
B. Over charging at high rate
19
Cells are connected in series in order to :
Answer
A. Increase the voltage rating
20
Sulphation in Lead acid battery occures due to :
Answer
D. Incomplete charging
21
The unit of capacitance is :
Answer
B. Farad
22
The opposition offered to the flow of current by a capacitor is called :
Answer
D. Capacitive Reactance
23
The unit of mmf is :
Answer
A. Ampere turns
24
The total number of lines of force per square metre of the cross sectional area of the magnetic core is called :
Answer
C. Flux density
25
The substances which are slightly repelled by a magnet of powerful strength only are known as :
Answer
B. Dia magnetic substance
26
The unit of magnetic flux is :
Answer
D. Weber
27
The magnetic pressure that drives magnetic flux through a magnetic circuit :
Answer
C. Magnetic motive force
28
The material strongly attracted to the magnetic field and can become magnetised themselves when placed in a magnetic field?
Answer
A. Ferro magnetic material
29
The ratio of magnetic flux density to the magnetic field strength is called :
Answer
B. Permeability
30
The material ability to retain its magnetism even after the external magnetic field is removed :
Answer
D. Retendivity
31
What is the maximum permissible voltage drop at the point of the commencement of supply at the consumers end for high and extra high voltage as per IE rule?
Answer
D. 12.5%
32
What is the average value for Voltage (Vav.), if the maximum value is Vm?
Answer
C. Vav = 0.637 Vm
33
What is called the maximum value of potential difference between a point on the ground and a live point touched by a person?
Answer
B. Touch potential
34
Which represents the physical position of accessories in the wiring installation?
Answer
D. Installation plan
35
Where do you connect megger terminals while measuring insulation resistance between conductors in a wiring Installation?
Answer
A. Outgoing terminals of Phase and Neutral wire in the main switch.
36
What is the current capacity of the wire, if the normal current carrying capacity is 20 Amps while it is protected by coarse excess current protection?
Answer
C. 16.2 Amps
37
What is the main reason for leakage current flowing in wring installation?
Answer
B. Insulation failure
38
What is the minimum depth at which the top edge of plate electrodes should be buried from the surface of the ground level?
Answer
A. 1.5 m
39
What is the permissible leakage current in any wiring installation as per IE rule?
Answer
D. Not exceed 1/5000th part of full load current
40
Which type of wiring system requires special sockets or plug with fuse?
Answer
C. Ring main system
41
What is the necessity of residual magnetism in a self exited DC generator?
Answer
A. To Build up voltage
42
What is the purpose of pole shoe in DC generator?
Answer
D. Spread out flux uniformly in the air gap
43
In a DC generator if the magnetic flux is doubled and the speed of the armature is halved, what happens to the generated EMF?
Answer
B. It remains the same
44
Which of the following DC generator will have negligible terminal voltage on no load?
Answer
B. Series
45
A differentially compounded DC motor is running at rated speed. If the series field winding of the motor get short circuited. What happened to the speed of the motor?
Answer
C. Decrease
46
Which Speed control method used for increasing the speed of DC motor above rated speed?
Answer
A. Field control method
47
The series field of a short shunt DC generator is exited by ____________ current.
Answer
C. Load current
48
In a DC shunt motor, the 3 point starter :
Answer
D. All of the above
49
The speed of DC shunt motor can be increased above its normal speed by :
Answer
B. Decreasing the field current
50
What is the main drawback of 3 point starter?
Answer
C. Motor may stop if field current is reduced
51
What happens to the voltage applied to each winding of the motor during star connection?
Answer
A. Reduced by 1 3
52
How does increasing rotor resistance affect starting torque?
Answer
B. Increases starting torque
53
Which color is typically used for the control circuit wiring?
Answer
Question Cancelled
54
An auto-transformer starter is used for :
Answer
C. Squirrel cage induction motor
55
In a D.O.L. starter, the Normally Open auxiliary contact is used for :
Answer
D. Maintaining self-hold or latching circuit
56
What type of current is used in phase sequence testing?
Answer
B. AC
57
Phase sequence is checked before :
Answer
A. Installing a motor
58
Which device in the panel controls the speed of an AC motor?
Answer
C. Variable Frequency Drive (VFD)
59
Which device is used to isolate the motor control panel from power supply for maintenance?
Answer
B. Isolator switch
60
What does MCCB stand for in motor control panels?
Answer
A. Molded Case Circuit Breaker
61
For power measurement, of three phase circuit by two wattmeter method, when the value of power factor less than 0.5 lagging?
Answer
B. One of the wattmeter connections will have to be reversed
62
Deflecting torque of moving iron attraction type instrument is :
Answer
C. Directly proportional to square of current
63
Which type of winding is used in three phase shell type transformer?
Answer
A. Sandwich type winding
64
A transformer is working at its maximum efficiency, as iron loss is 500 W, Its copper loss will be?
Answer
C. 500 W
65
Transformers are rated in :
Answer
C. KVA
66
Find the total output power of the transformer, Primary voltage is 240 V, Secondary voltage is 12 V, and secondary current 3 A?
Answer
A. 36 VA
67
In a transformer 11KV/440V, 100KVA, is 435V at no load, 421V at 0.94 power factor under full load condition. Calculate the percentage voltage regulation of the transformer.
Answer
D. 3.32%
68
Which is absolute Instrument?
Answer
B. Tangent Galvanometer
69
Which type of instrument is used air friction damping?
Answer
Question Cancelled
70
A 1 milli ampere meter has a coil resistance of 1000 ohms, what value of multiplier resister is needed to measure 100 V?
Answer
D. 99000 Ohm
71
The main function of the agitator in a washing machine is :
Answer
B. To rotate clothes during washing
72
Which component controls the speed of a fan in electronic regulators?
Answer
A. Triac
73
What is the function of a choke in a fluorescent lamp circuit?
Answer
D. Both
74
Which lamp has the highest luminous efficacy?
Answer
C. LED lamp
75
According to the inverse square law, illumination on a surface is inversely proportional to :
Answer
B. Square of the distance from the light source
76
The emitter base junction of a given transistor is forward biased and Collector base Junction reverse biased. If the base current is increased then it’s :
Answer
A. Collector current will increase
77
Zener breakdown occurs in junctions which are :
Answer
C. heavily doped and narrow depletion layer
78
The ripple frequency of a full-wave bridge rectifier is :
Answer
D. Twice the input frequency
79
Compared to a silicon P-N diode, a Schottky diode exhibits :
Answer
B. Lower forward voltage and faster switching
80
The main advantage of the emitter-follower
Answer
D. High current gain and low output impedance
81
What is the main constituent of Bio-gas?
Answer
C. Methane
82
Which of the power plant use conventional energy source to produce electricity?
Answer
B. Nuclear power station
83
Which equipment converts water into steam on steam power station?
Answer
A. Boiler
84
Which equipment in steam power plant heats the feed water on its way to boiler by deriving heat from flue gases?
Answer
C. Economiser
85
What is the primary function of condenser in steam power station?
Answer
A. Create a very low pressure at the exhaust of turbine.
86
Which type of turbines is used in high head hydroelectric power stations?
Answer
D. Pelton wheel turbine
87
What is the function of moderator in nuclear reactor?
Answer
A. Slows down the neutron
88
Which phenomenon is used in solar panels to produce electricity?
Answer
B. Photovoltaic effect
89
The main source of production of biogas is :
Answer
D. All of the above
90
What is the function of gear box in wind turbine?
Answer
B. It converts rotor rotation in to high speed
91
Which is the normal cable connected between distributors and consumer load terminal?
Answer
C. Service lines
92
What is called the difference in level between points of supports and the lowest point on the conductor in overhead lines?
Answer
B. Sag
93
Which insulator is used for holding the line conductors of a overhead line on straight running of poles?
Answer
A. Pin insulator
94
Which is disadvantage of DC Transmission?
Answer
D. Generation of high voltage is difficult
95
What is ACSR stands for?
Answer
D. Aluminium Conductor Steel Reinforced
96
What is the span length of RCC poles used for distribution?
Answer
Question Cancelled
97
Which is used for connecting copper wire to aluminium conductor in the case of consumer service?
Answer
C. B.M.P.G. Clamp
98
Which of the following statement is/are correct about AC Electric power Transmission? (i) Power can be generated at high voltages (ii) Due to skin effect, less copper is required (iii) Construction of AC transmission lines is more complicated as well as costly
Answer
D. Only (i) & (iii)
99
Which of the following statement is/are correct about Properties of a good line insulator? (i) High mechanical strength (ii) High relative permittivity (iii) High ratio of puncture strength to flash over
Answer
C. All of the above (i), (ii) & (iii)
100
Which of the following statement is/are wrong about Suspension type insulator? (i) If any one disc is damaged, the whole string does not become useless (ii) Suspension type insulators are costlier than pin type insulators for voltage beyond 33 KV (iii) Suspension arrangement provides greater flexibility
Answer
B. Only (ii)
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