| Post Name | Electrician - Agriculture Development and Farmer's Welfare, Ground Water & Water Transport |
|---|---|
| Question Paper Code | 050/2022 |
| Category Code | 407/2021, 463/2021, 679/2021 |
| Date of Test | 7 May 2022 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
The property of a conductor due to which it passes electric current is called
Answer
D. Conductance
2
Which of the following materials has negative temperature co-efficient of resistance?
Answer
C. Carbon
3
A rheostat differs from potentiometer in the respect that it
Answer
B. Has higher wattage ratings
4
1 Coulomb charge equals to the charge on
Answer
A. 6.24 × 1018 electrons
5
An instrument which detects electric current flow is known as
Answer
C. Galvanometer
6
The resistance of a conductor varies inversely as
Answer
C. Diameter
7
Varistors act like
Answer
D. Non-linear resistors
8
Melting temperature of electrician's solder is
Answer
D. 185°C
050/2022 [P.T.O 3
9
Which of the following materials is good conductor of electricity?
Answer
D. Copper
10
Maximum current carrying capacity of 1.5 mm2 aluminium wire
Answer
C. 8A
11
Kirchhoff's law is applicable to
Answer
D. Both AC and DC circuits
12
The circuit whose properties are same in either direction is known as
Answer
C. Bilateral circuit
13
The capacity of a storage cell is expressed in
Answer
C. Ampere hour
14
Which of the following acts as depolarizer in Leclanche cell?
Answer
C. MnO2
15
Why Constantan wire is used for making standard resistors?
Answer
C. Low temperature co-efficient of resistance
16
The capacity of a storage cell is 2.5 Ah. What is the maximum current that can supply
for half hour?
Answer
D. 5.0 A
17
Sedimentation in lead acid batteries occurs due to
Answer
A. Overcharging at high rate
18
The capacitance of a capacitor is not affected by
Answer
A. Thickness of the plates
19
According to Lenz's law the direction of induced current always
Answer
B. Opposes the cause
20
Electrochemical equivalent is usually expressed in
Answer
A. Milligrams/Coulomb
21
Magnets are made of low retentivity but high permeability materials are called
Answer
C. Electromagnets
22
The diamagnetic material has relative permeability
Answer
A. Less than 1
23
The unit of Magnetomotive force is
Answer
Question Cancelled
24
Working principle of auto transformer is
Answer
C. Both induction and conduction
25
Magnetic field exists around
Answer
D. Moving charges
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26
Fleming's left hand rule is used to find
Answer
B. Direction of force on a current carrying conductor in a magnetic field
27
Susceptability is positive for
Answer
Question Cancelled
28
The unit of capacitance is
Answer
B. Coulombs/Volt
29
Internal resistance of a cell is due to
Answer
D. All of the above
30
When two resistors are connected in series they have
Answer
D. Same current passing through them
31
Skin effect occurs when a conductor carries current at _______ frequencies
Answer
A. High
32
The pf of the following circuit will be unity
Answer
A. Resistive circuit
33
Form factor for a sine wave is
Answer
B. 1.11
34
In a series RLC circuit on resonance condition
Answer
D. XL = XC
35
The load on each sub-circuit shall be restricted to
Answer
Question Cancelled
36
The length of the rod and pipe electrodes used for earthing shall not be less than
Answer
B. 2.5 m
37
During continuity test, dead short in an installation is indicated by megger
Answer
A. zero ohms
38
The output rating of an alternator is expressed in
Answer
B. KVA
39
Batten wiring is recommended for
Answer
B. Permanent
40
The voltage wave form produced by alternator should be
Answer
B. Sine wave
41
In DC machines, mechanical losses are primarily function of
Answer
A. speed
42
Armature of a DC machine is made of
Answer
Question Cancelled
43
Which DC motor has got maximum self loading property?
Answer
C. differentially compounded motor
44
When a DC series motor is connected to an AC supply, then
Answer
D. It will run with less efficiency and high spark at commutator
45
For a 4 pole machine wave winding is impossible with armature conductors of
Answer
B. 32
46
Where is field winding mounted in a DC machine?
Answer
A. Stator
47
In normal DC machines operating at full-load conditions, the most powerful
electromagnet is
Answer
A. Field winding
48
When an electric train is moving down a hill, the DC motor will operate as
Answer
B. DC series generator
49
Which of the following is not the function of pole shoe in DC motor?
Answer
A. To reduce eddy current loss
50
In DC generators, the brushes on commutator remain in contact with conductors
which
Answer
C. lie under interpolar region
51
Insertion of resistance in the rotor of an induction motor
Answer
B. changes the speed at which maximum torque is developed
52
Torque developed by a single phase induction motor at starting is
Answer
D. nil
53
An induction motor is identical to
Answer
D. Asynchronous motor
54
The efficiency of an induction motor can be expected to be nearly
Answer
B. 80 to 90%
55
The cause of crawling in the induction motor is
Answer
C. Harmonics developed in the motor
56
The starting capacitor of a single phase motor is
Answer
A. Electrolytic capacitor
57
In cylindrical rotor ________ portion of the rotor is wound.
Answer
B. two-third
58
In the circle diagram of an induction motor the diameter of circle represents the
Answer
A. rotor current
59
In an induction motor, rotor slots are usually not quite parallel to the shaft but are
given a slight skew
Answer
C. Both
60
For an induction motor, synchronous wattage means
Answer
C. Rotor input in watts
61
Which of the following places is not associated with nuclear power plants in India?
Answer
D. Bangalore
62
Equipment used for pulverizing the coal is known as
Answer
A. Ball mill
63
The largest source of electricity in India is
Answer
D. Thermal power
10 050/2022
64
In francis turbine runner, the number of blades is usually of the order of
Answer
C. 16-24
65
Water hammer occurs in
Answer
B. penstock
66
The modern steam turbines are
Answer
C. impulse-reaction turbines
67
Usually, the generated voltage in generating stations is
Answer
B. 11 KV
68
The most economical power factor for a consumer is
Answer
A. 0.9 lagging
69
Load factor of a power station is generally
Answer
B. less than unity
70
In thermal power plant, turbine is placed
Answer
B. in between boiler and generator
71
The usual spans with RCC poles are
Answer
C. 80-100 metres
72
High voltage transmission lines use
Answer
A. suspension insulators
73
Relays used in long transmission lines is
Answer
B. Mho's relay
74
The material commonly used for insulation in high voltage cables is
Answer
A. paper
75
66 KV is suitable for transmission of power over
Answer
B. 120 km
76
Bundled conductors in EHV transmission system provide
Answer
A. increased capacitance
77
Current flow through the neutral of three phase 4 wire cable is
Answer
B. equal to the sum of currents in phase wires
78
Skin effect results in
Answer
D. increased effective resistance as well as effective internal reactance
12 050/2022
79
The most suitable practical value of primary distribution is
Answer
B. 6.6 kV
80
Which among the following properties has got a higher for aluminium in comparison
to that of copper?
Answer
A. Electrical resistivity
81
The force producing movement of the pointer in an indicating instrument is called
Answer
B. Deflecting force
82
An instrument using gravity control will read correctly if used in
Answer
A. the vertical position only
83
The deflecting torque of moving iron attraction type of instrument is _______
Answer
C. directly proportional to the square of the current
84
Air is removed from incandescent lamp is to:
Answer
A. prevent oxidation
85
Light energy radiated per second from a light source is called
Answer
D. Luminous flux
86
A 60 w lamp given a luminous flux of 1500 lumen its efficiency is
Answer
B. 25 lumen/watt
87
The no load current of a transformer in terms of the full load current is usually
Answer
B. 5 to 9%
88
The purpose of oil in the transformer is to
Answer
B. Insulate and cool
89
Buchholz relay is a protective device used in
Answer
D. Power transformer
90
Dynamometer type wattmeter can be used on
Answer
A. Both AC and DC
91
The specification of ceiling fan is
Answer
C. Sweep
92
The gas filled in a sodium vapour lamp is
Answer
Question Cancelled
93
Which element is used as a semiconductor material?
Answer
D. Silicon
94
The main characteristic of any diode is
Answer
A. it lets current flow in only one direction
95
NPN transistors are preferred to PNP transistor for
Answer
B. higher switching speed
96
The number of depletion layers in a transistor is
Answer
B. Two
97
The material used in an oven as heating element is
Answer
D. Nichrome
98
Which motor is generally used for domestic washing machine?
Answer
C. capacitor start motor
99
An Ohm meter is used for measuring
Answer
A. resistance
100
The rotating speed of the magneto type megger is
Answer
C. 160 rpm
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