| Post Name | Electrician in KSFDC, Tourism, Agriculture etc |
|---|---|
| Question Paper Code | 121/2021 |
| Category Code | 106/2019, 326/2020, 349/2020, 404/2020, 084/2021, 209/2021 |
| Date of Test | 21 November 2021 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
What is the rating factor of cable provided with coarse excess current protection?
Answer
C. 0.81
2
Which type of solder is used for soldering aluminum conductors?
Answer
B. Ker-al-lite
3
How many electrons are there in the third cell of the copper atom?
Answer
A. 18
4
What is the value of electrical conductivity of aluminium conductor?
Answer
Question Cancelled
5
Which test is conducted to locate the faults in U.G cables?
Answer
D. Loop test
6
Which one defines the change in resistance in Ohm () per degree centigrade (°
Answer
A. Temperature co-efficient
7
In the case of electrolytes a rise in temperature causes :
Answer
C. decrease in resistance
8
Calculate the hot resistance of 200W / 250V rated lamp :
Answer
B. 312.5
9
The output voltage of an ideal voltage source is :
Answer
B. constant
10
A semiconductor has generally ———————— Valance electrons.
Answer
D. 4
11
Which method can be used for measuring low and medium value of resistance?
Answer
C. Voltmeter and ammeter method
12
The S.I. unit of specific resistance is :
Answer
A. ohm-meter
13
According to Kirchhoff’s law, the algebraic sign of an ‘IR’ drop is primarily dependent upon
the :
Answer
B. direction of current flow
14
What is the value of resistance in an open circuit?
Answer
C. Infinity
15
What is the unit of Reluctance?
Answer
D. Ampere turns / Weber
16
Which is the cause for changing the Permeability?
Answer
A. Flux density
17
A substance that has a high retentiveness can be used for the manufacture of :
Answer
B. Permanent magnet
18
Which is the diamagnetic substance?
Answer
A. Water
19
The direction of induced e.m.f. can be found with the help of :
Answer
Question Cancelled
20
One Weber/second is called :
Answer
C. 1 Volt
21
The magnetizing force required to wipe off residual magnetism is known as :
Answer
C. Coercive force
22
The example of natural magnet is :
Answer
D. Lode-stone
23
Which electrical quantity is directly proportional to the eddy current?
Answer
B. Frequency
24
How the value of capacitance can be decreased?
Answer
A. Increasing the distance between the plates
25
Which of the following quantity maintain the same polarity during charging and discharging
of a capacitor?
Answer
D. Capacitor voltage
26
What is the unit of susceptance?
Answer
C. Mho
27
What is the formula to find 3 phase reactive power (Pᵣ) if the line voltage is V_L and line current is I_L?
Answer
A. Pᵣ = √3 V_L I_L sin θ
28
What is the main cause for below 0.5 lagging power factor in 3 phase system?
Answer
B. Reactive power due to more inductive load
29
A 3-phase, 4 wire, 230/415 volt system is supplying lamp load at 230 volt. If a 3-phase motor
is now switched ON across the same supply, then :
Answer
C. neutral current remain unchanged
30
For plate earthing, plate electrodes thickness when made of G.I or steel should not be less
than :
Answer
C. 6.3 mm
31
According to IE rule the leakage current in an installation should not exceed one
———————— th part of the maximum current supplied to the installation.
Answer
C. 5000
32
The size of the earth continuity conductor in a circuit should be based up on the :
Answer
B. Size of largest service conductor
33
In surface conduit wiring, saddles should be fitted at intervals of not more than
———————— meter.
Answer
D. 1
34
In batten wiring, Link clips will have two holes for :
Answer
Question Cancelled
35
According to IE rule, the measured insulation resistance should not be less than :
Answer
C. 1 mega ohm
36
Eight carbon – zinc cells in series have an output of ———————— volt.
Answer
B. 12
37
What is the out voltage of lithium cell?
Answer
Question Cancelled
38
Which cell is most often used in digital watches?
Answer
A. Mercury cell
39
Which is used as an electrolyte in lead acid battery?
Answer
B. Dilute sulfuric acid
40
What is the effect of buckling defect in lead acid battery?
Answer
D. Bending of the electrodes
41
The DC Generator works on the principle of :
Answer
A. Faraday’s law
42
Which type of DC machine poles is residual magnetism necessary?
Answer
C. Shunt motor
43
Which type of motor that does not have a commutators?
Answer
D. Induction motor
A 7 121/2021
44
The lowest starting torque of the motor :
Answer
B. Shaded Dole motor
45
Hydroelectric power station located :
Answer
C. Hilly area
46
The full form of XLPE cable is :
Answer
A. cross linked polyethylene cable
47
Wave winding has ———————— parallel path.
Answer
B. two
48
In permanent capacitor motor the direction is revised by inter change the :
Answer
D. Auxiliary winding terminal
49
In stay wire ———————— type of insulator are used.
Answer
A. egg type
50
Surge tank is used in to function of :
Answer
C. avoid water hammering in pen stock
51
Transformer working on the principal of :
Answer
D. mutual induction
52
In normal case inter poles are connected in :
Answer
Question Cancelled
53
While testing a capacitor with a multi meter the needle shows zero position right from the
beginning indicator to the capacitor is :
Answer
Question Cancelled
54
Transformers are rated in :
Answer
D. KVA
55
In nuclear power section graphite is used for :
Answer
A. moderator
56
In armature core lamination is to reduce :
Answer
B. Eddy current loss
57
In slip induction motor has :
Answer
Question Cancelled
58
Two transformer operated in parallel will share the load depending upon their :
Answer
A. per unit impendence
59
For low discharge and high load water turbine using in :
Answer
B. Pelton wheel
60
In DC generator the emf equation is :
ZN A ZP
Answer
D. E Volt
120 60 A
61
Thermal over load relay is provided in a starter to protect the motor against :
Answer
B. excess current
62
Solar cell are made of :
Answer
C. Silicon
63
Corona is accompanied by :
Answer
D. All of the above
64
The solar cell convert in :
Answer
A. Solar energy into electrical energy
65
In welding purpose which type of DC generator is used :
Answer
C. DC differential compound generator
66
The running speed of a 3-phase squirrel cage induction motor is :
Answer
B. Less than the synchronous speed
67
In nuclear reactor usually function :
Answer
A. fission
68
Which supply source changes the polarity constantly?
Answer
D. AC supply
69
The counter e.m.f. oppose :
Answer
B. Applied voltage
70
According to NE code the colour code for the neutral :
Answer
C. Black
71
In thermal nuclear reactors for power generation which type of fuel is used :
Answer
D. U235
72
Direct current is essential for the function of :
Answer
A. Arc lamp
73
In electric traction which type of motor is used?
Answer
D. DC series
74
During continuity test in an installation the mugger indicated reading in :
Answer
B. zero mega ohm
75
Biogas consists :
Answer
A. Methane and carbon dioxide with some impurities
76
By using the device AC power can convert DC power :
Answer
C. Rectifier
77
At no load the speed of a DC series motor is :
Answer
C. infinity
78
NVC used in a starter to protected the motor against :
Answer
D. low voltage
A 11 121/2021
79
The tridal power plant turbine usually employed in :
Answer
B. Reversible type
80
The back e.m.f. of a DC motor depends on the :
Answer
A. field flux
81
The closeness of the measured value of a quantity, by an instrument, to its true value is
known as :
Answer
B. Accuracy
82
The basic movement in a permanent magnet moving coil instrument is called as :
Answer
C. d’Arsonval movement
83
A coil of area A and N turns carries current I in magnetic flux density B. The deflecting torque T_d is:
Answer
A. T_d = NBAI
84
Constant uniform deviation of operation of an instrument due to the instrument itself,
observation of the observer or environmental conditions, resulting in errors when taking a
measurement is called :
Answer
D. Systematic errors
85
The opposing force that brings the pointer in an indicating instrument to its final deflected
position by avoiding oscillations is :
Answer
B. Damping torque
86
A transformer is a static device that is used to :
(i) convert voltage to a higher (step-up) or lower (step down) level
(ii) convert current to a higher (step-up) or lower (step down) level
(iii) convert frequency to a higher (step-up) or lower (step down) level
Answer
A. both (i) and (ii)
87
An ideal transformer has 900 turns and 90 turns in its primary and secondary windings
respectively. If 220 V, 50 Hz AC is applied at its primary, What will be the AC available at its
secondary?
Answer
C. 22 V, 50 HZ AC
88
When connecting two or more transformers in parallel, a dead short circuit will be produced
in the secondary, if :
Answer
B. the transformers are not properly connected with regard to the polarity of primary
and secondary terminals
89
The core of a transformer is laminated to reduce :
Answer
D. Eddy current losses
90
The primary and secondary voltages of an auto transformer are 600 V and 300 V
respectively. If the secondary current is 90 A, then the primary current is :
Answer
C. 45 A
91
A forward biased Silicon diode, will start to conduct when the applied voltage across it
reaches :
Answer
A. 0.7 V
92
If a source of light emits light equally in all directions, then the Illuminance at any point on a
plane perpendicular to the line joining the point and the source is :
Answer
B. inversely proportional to the square of the distance between the source and the
plane
93
The type of lamp in which gas or vapour is made luminous by an electric discharge through
them is :
Answer
D. Discharge lamp
A 13 121/2021
94
If, for a bipolar junction transistor, 0.99 , then :
Answer
C. 99
95
Reverse breakdown of a PN diode under reverse bias due to increase in kinetic energy of free
electrons is called :
Answer
B. Avalanche breakdown
96
The majority charge carriers in P type semiconductor are :
Answer
D. holes
97
When a group V element such as arsenic is added to pure silicon, it results in the type
semiconductor referred to as :
Answer
D. none of the above
98
The type of diode that exhibits negative resistance under low forward bias condition
is :
Answer
D. Tunnel diode
99
When compared to fullwave rectifier, a half wave rectifier is characterised by :
Answer
A. excessive ripple, small value of rectification efficiency, small value of transformer
utilization factor and DC saturation of transformer core
100
For a bipolar junction transistor to operate in the active region, its :
Answer
Question Cancelled
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