| Post Name | ELECTRICIAN/LINEMAN - KAMC Ltd./ PWD |
|---|---|
| Question Paper Code | 015/2021 |
| Category Code | 100/2020, 117/2020 |
| Date of Test | 19 January 2021 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
How many electrons are in a Aluminum atom ?
Answer
A. 13
2
What is unit of the quantity of electricity ?
Answer
A. Coulomb
3
What is the working temperature of electrician solder ?
Answer
A. 185 °C
4
Out of the following which composition of tin and lead used in fine solder ?
Answer
C. 63%, 37%
5
Which one is equal to one mega ohm ?
Answer
A. 1000000
6
Which effect of electric current is used for soldering iron ?
Answer
D. Heating effect
7
How many electrons are in the outer most orbit of intrinsic semi conductor atom ?
Answer
C. Four
8
The normal current carrying capacity of 1.5 sq: mm copper cable is 16A. What is the
current carrying capacity of a cable when protected by coarse excess current protection ?
Answer
A. 13A
9
What is the conductivity of aluminum conductor when compared to copper conductor of
the same size ?
Answer
C. 60.6%
10
Each question is provided with four choices
Answer
C. and
11
Find the value of resistance in a circuit having current 2.5A and voltage applied 230V ?
Answer
C. 92
12
Which law states that in each closed circuit the sum of all voltage drops is equal to zero ?
Answer
D. Kirchhoff’s Second law
13
What is the temperature co-efficient of resistance of a semi conductor ?
Answer
A. Negative
14
In electrolysis the positive electrode is called
Answer
C. Anode
15
What is the value of resistivity of copper ?
Answer
B. 0.017 micro ohm meter
16
What is the average e.m.f of Leclanche cell ?
Answer
C. 1.5V
17
What is the total output voltage if five cells of 1.5V are connected in parallel ?
Answer
B. 1.5V
18
Which one of the harmful gas evolutes at the time of charging a lead acid battery ?
Answer
D. Hydrogen
19
What is the method of charging the battery is called when the battery is charged at very
low rate ?
Answer
B. Trickle charge method
20
The bending of electrodes of lead acid cell due to overcharging and discharging,
improper electrolyte and temperature known as
Answer
C. Buckling
21
What kind of magnetic substance is Water ?
Answer
D. Dia magnetic
22
In what direction internally the magnetic lines of force travel in bar magnet ?
Answer
B. South to north
23
What will happen if a bar magnet is broken in to two pieces ?
Answer
B. Each piece will become a separate magnet
24
What is the directional indication of middle finger according to Flemings Right Hand Rule ?
Answer
A. direction of Induced emf
25
Which law states that the magnitude of the induced emf is directly proportional to the
rate of change of flux linkage ?
Answer
C. Faraday's Second Law of Electromagnetic Induction
26
What is the expansion form MMF as regarding of electromagnetism ?
Answer
C. magneto motive force
27
The property of magnet which opposes magnetic flux through is called
Answer
D. Reluctance
28
What is the unit of magnetic flux density ?
Answer
D. Web/m2
29
Three capacitors 25 mfd, 125 mfd and 150 mfd are connected in parallel, find the value
of total capacitance.
Answer
D. 300 mfd
30
What is the correct relationship between capacitance (C), voltage (V) and electric charge (Q)?
Answer
A. C = Q/V
31
Which of the following average value of AC sine wave ?
Answer
A. 0.637 Imax
32
The ratio of effective value to average value of half cycle is called as
Answer
B. Form factor
33
What is the unit of susceptance ?
Answer
C. Mho
34
In which of the following load power factor is unity ?
Answer
B. Pure Resistive load
35
What is the minimum dimension of copper earth plate as per Indian standards ?
Answer
A. 60 cm 60 cm 3.15 mm
36
What is the minimum internal diameter of G.I pipe for pipe earthling as per Indian
standards ?
Answer
B. 38 mm
37
What is the expansion form of RCCB ?
Answer
C. Residual current circuit breaker
38
As per IE Rule 48, the maximum permissible voltage drop in a power industrial circuit
should not more than
Answer
D. 5% of the declared supply voltage
39
What is the maximum load in a sub-circuit as per IE Rule regarding internal wiring ?
Answer
A. 800 W
40
According to Indian standards, the insulation resistance of any wiring installation should
not be less than ________.
Answer
D. 1 M
A 7 015/2021
41
Working principle of DC generator based on
Answer
C. Faraday’s laws of electromagnetic induction
42
In DC machine of number of commutator segments is equal to
Answer
C. no. of armature coils
43
In DC generators lap winding is used for
Answer
D. low voltage, high current
44
Which type generator used for ARC welding ?
Answer
C. Differential compound
45
As per BIS of the minimum value of insulation resistance required for low and medium
voltage rated machines
Answer
C. 1 mega ohm
46
What happened if the field flux of a DC motor reduced to half ?
Answer
D. Speed increased to two times
47
The direction of rotation of DC series motor can be changed by
Answer
B. Interchanging field terminals
48
Which starter used for control the speed of DC motor above rated speed
Answer
A. Four point starter
49
The yoke of a DC generator is usually made of
Answer
A. Cast Iron
50
In over compound generator full load terminal voltage is
Answer
B. more than no load terminal voltage.
51
Why the double cage rotor of a 3-phase squirrel cage induction motor is short circuited ?
Answer
D. To maintain good torque
52
Why the rotor bars of a 3 phase squirrel cage induction motor are mounted in a slightly
skewed position ?
Answer
A. To avoid magnetic locking
53
Why starter is necessary for the operation of 3 phase induction motors ?
Answer
B. To protect the motor from over load
54
What is the rating of backup fuse to be provided for a 10HP AC 3 phase squirrel cage
induction motor ?
Answer
C. 25 Amps
55
What is the amount of torque reduced while the motor is running in star connection compared to delta connection?
Answer
B. 1/3 Times
56
Which type of the starters are suitable for three phase squirrel cage induction motor from
20 to 150 HP ?
Answer
C. Auto transformer starter
57
Which type of single phase motor is having a commutator ?
Answer
B. Repulsion motor
58
Which places capacitor start, capacitor run induction motor are used ?
Answer
B. Compressors
59
Which motor is used in ceiling fan ?
Answer
C. Permanent capacitor motor
60
Which type of motors develops more horse power per Kilogram weight ?
Answer
A. Universal motor
61
Which method of power generation has low production and maintenance cost ?
Answer
B. Hydro Electric
62
Which method of power generation is most complex ?
Answer
A. Nuclear
63
An example for conventional type power generation
Answer
A. Hydro
64
Economiser used to heats
Answer
D. Feed Water
65
In nuclear reactor which material used as a moderator ?
Answer
B. Graphite
66
Which is not a major considerable point in site selection of Hydro electro power stations ?
Answer
D. Load Centre
67
Which turbine is used in high head ?
Answer
C. Impulse turbine
68
A Low head Hydroelectric plants has an operating head
Answer
B. Below 30 mtr
69
Which condition is not cause for power loss in solar panels ?
Answer
A. Loading
70
The major disadvantage of wind power generation is
Answer
D. Wind power is not constant and steady
015/2021 10 A
71
Which system is universally adopted for power transmission ?
Answer
D. Three Phase Three Wire System
72
Primary distribution Voltage is
Answer
D. 11 kV
73
Disadvantage of DC transmission system
Answer
C. Generation of high DC Voltage is difficult
74
In terminating on corner poles which insulator is used ?
Answer
C. Shackle insulator
75
Minimum height required usage of strain insulator
Answer
Question Cancelled
76
Minimum vertical clearance required between two live conductors in LT lines on the
same support is
Answer
B. 20 cm
77
Galvanized steel wires used in ACSR conductors to increase
Answer
C. Tensile strength
78
As per IE rules medium line voltage is
Answer
D. below 650V
79
Which factor is not affect the corona ?
Answer
B. Line current
80
Permissible span length of wooden poles is
Answer
D. 40-50 mtr
A 11 015/2021
81
Which of the following is not an indicating instrument ?
Answer
C. Ampere hour meter
82
EMF equation of transformer
Answer
D. None of these
83
Transformation ratio of a transformer is
E2 N2 E1 N2
Answer
A. E = N
84
Primary Ampere turns I1N1 of a transformer is equal to
Answer
B. I2N2
85
Which instrument is used to measure only DC values ?
Answer
B. PMMC instrument
86
Tangent galvanometer is a/an ________ instrument.
Answer
D. absolute
87
_________ causes the moving system of the instrument to move from its ‘zero’ position,
when the instrument is connected to the supply.
Answer
A. Deflecting torque
88
All day efficiency of transformer is
Output kWh in 24 hrs
Answer
A. Output kWh in 24 hrs + Loss in 24 hrs
Input kWh in 24 hrs
89
Efficiency of a transformer is usually
Answer
C. Above 90%
90
In a/an ________ instrument the pointer will oscillate before coming to final deflected
position.
Answer
B. Under-damped
91
To obtain more holes, a pure silicon crystal is doped with ________.
Answer
D. Boron
92
________ gas is filled in incandescent lamp.
Answer
A. Argon
93
Unit of luminous flux
Answer
D. lumens
A 13 015/2021
94
Illumination of a surface is inversely proportional to _________.
Answer
A. square of the distance from source
95
Barrier potential of silicon diode is approximately
Answer
C. 0.7V
96
Atomic number of Germanium
Answer
C. 32
97
Luminous efficiency is measured in
Answer
D. Lumens/Watt
98
Which is an active component ?
Answer
B. Diodes
99
The emitter of a transistor is __________.
Answer
B. heavily doped
100
Visible light is the radiation in that part of the spectrum between approximately _______.
Answer
C. 380 nm to 740 nm
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