| Post Name | DRAFTSMAN GR.II(Electrical)/ SKILLED ASST. GR.II. etc. - KSHB,PWD(Electrical Wing) etc. |
|---|---|
| Question Paper Code | 113/2023 |
| Category Code | 057/2022, 268/2022, 272/2022, 316/2022, 325/2022, 346/2022, 347/2022, 446/2022, 605/2022 |
| Date of Test | 11 July 2023 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Match the items in List β 1 to List β 2 :
List β 1: 1. Current; 2. Potential difference; 3. Resistance.
List β 2: I. Volt; II. Ohm; III. Ampere; IV. Coulomb.
Answer
C. 1 β III, 2 β I, 3 β II
2
One coulomb charge equal to the charge of
Answer
D. 6.24 Γ 10ΒΉβΈ protons
3
A conductor carries 7 coulomb charge for a duration of 10 seconds then the current
through the conductor is equal to
Answer
A. 0.7 A
4
From the following options which one is correct regarding conductor, insulator and
semiconductors ?
Answer
C. The valance band and conduction band overlaps in conductors
5
From the given options select the list of insulators.
Answer
D. mica, Wood, Paper
6
If a material having forbidden energy of 6 electron volt. Identify the type of
material.
Answer
B. Insulator
7
Identify the requirements of a good insulating material in a cable.
I. High dielectric strength.
II. low mechanical strength.
III. Able to withstand temperature from β30 degree celcius to over 100 degree
celcius.
IV. High insulation resistance.
Answer
C. I, III and IV only
8
Read the statements and choose the correct option.
1. Wire wound resistors are used for high current applications.
2. Carbon composition resistors are used for small power applications.
Answer
A. 1 and 2 are correct
9
The function of flux in soldering is
Answer
B. To keep the metal surface clean and oxide free
10
Identify the effect of aluminium impurity in tin-lead solder from the following.
Answer
Question Cancelled
11
From the given statements which are related to para magnetic materials ?
I. The substance are weakly magnetized when placed in an external magnetic
field.
II. The substances move from weak field region to strong field region in a
non-uniform magnetic field.
III. magnetic susceptibility is negative.
IV. Relative permeability is less than one.
Answer
A. I and II only
12
From the following properties identify the type of magnetic material.
I. A magnetic material with susceptibility is low and negative.
II. They tend to move from high field region to low field region under the influence
of non-uniform magnetic field.
Answer
D. diamagnetic material
13
When a conductor is moved to south direction in a magnetic field which is directed
upwards. Then the direction of current in the conductor will be
Answer
B. Towards west
14
Identify the correct sequence related to Fleming left hand rule.
Answer
B. X-magnetic field, Y-current, Z-force
15
From the following options which is correct related to reluctance of a magnetic
material ?
Answer
A. Reluctance is directly proportional to length and inversely proportional to the
area of the material
16
If an electromagnet contains 100 turns and carries a current of 5 A. Find the reluctance
if the flux produced by the electromagnet is 0.2 webber.
Answer
A. 2500 AT/web
17
Tesla is the unit of
Answer
C. Magnetic flux density
18
Find the number of turns in the coil if an emf of 40 volt developed across it with a
flux change in the rate of 0.8 web/second.
Answer
A. 50
19
If the capacitance of a parallel plate capacitor is βCβ. The area of conductor is
doubled and distance of separation between conductors is halved then the change
in capacitance equal to
Answer
D. 4C
20
If two capacitors C1 and C2 are connected in series. Then the value of effective
capacitance should be
Answer
B. less than C1 and
21
From the given statements choose the correct one which are related to law of
resistance ?
I. Resistance is directly proportional to length of material.
II. Resistance is inversely proportional to area of cross section.
III. Resistance depends on the nature of material.
Answer
C. I, II and III
22
If the length and area of a material is doubled then change in resistance of material is
Answer
C. Resistance remains the same
23
Choose the material with positive temperature coefficient of resistance.
Answer
C. Copper
24
Two lamps each of rating 100 Watt and 200 Volt which are connected in series.
Find effective resistance of the circuit.
Answer
D. 800 ohm
25
If 20 ohm and 30 ohm resistor are connected in series across 200 volt supply.
Find voltage drop across 30 ohm resistor.
Answer
B. 120 volt
26
From the following find out the reason for buckling effect in cells.
I. Over charging.
II. Continuous operation of battery in discharge.
III. Non-uniform distribution of current in plates.
Answer
D. I, II and III
27
Electroplating is based on
Answer
B. Chemical effect of electricity
28
From the given cells identify the cell that can be recharged.
Answer
C. lead acid cell
29
Find potential difference across the points A and B. If the internal resistance are
same for all the cells.
Answer
D. 15 V
30
From the following identify the nature of fully charged cell.
I. Gassing at the both plates of cell.
II. Voltage raise of the cell.
III. Specific gravity of the electrolyte decreases.
Answer
A. I and II only
31
How the low power factor (P.F.) can be improved in AC circuits ?
Answer
D. By connecting capacitors in parallel
32
How much will be the insulation resistance of an installation ?
Answer
A. Not less than 1 mega ohm
33
In which condition resonance will occur in R-l-C series circuit ?
Answer
B. Inductive reactance (Xl) is equal to capacitive reactance (XC)
34
What is the maximum permissible load for a power sub circuit as per I.E. rules ?
Answer
D. 3000 Watt
35
What is the megger reading in a dead short wiring installation ?
Answer
A. 0 m ohm
36
What will happen to the value of earth resistance if length of the earth pipe is
increased ?
Answer
C. Decreases
37
Which method of cable laying is suitable for congested areas ?
Answer
B. duct pipes
38
Where system earthing is done ?
Answer
A. Generating station
39
What is the term for the time taken by a fuse to interrupt the circuit in fault ?
Answer
C. Cut-off factor
40
Which electrical equipment is provided with l series mCB ?
Answer
A. General lighting
41
Which rule is used to find the direction of induced emf in D.C. generator ?
Answer
D. Flemingβs right hand rule
42
What is the formula for dynamically induced emf ?
Answer
C. BlV sinΞΈ volts
43
What is the name of generator, if its field is connected in parallel with armature ?
Answer
A. Shunt generator
44
What is the property of wave winding in d.C. generator ?
Answer
C. low current high voltage
45
What is the effect if the shunt field resistance is above critical resistance value in a
d.C. generator ?
Answer
C. Generator fails to build up voltage
46
What is the purpose of series resistor connected with holding coil in a d.C. four point
starter ?
Answer
A. limit the current in holding coil
47
Why the direction of rotation is changed only by changing the armature current
direction in a d.C. compound motor ?
Answer
B. maintain motor characteristics
48
Which speed control methods offers below normal speed in dC shunt motor ?
Answer
C. Armature control method
49
Why the D.C. series motor field winding is wound with thick wire ?
Answer
B. To carry the load current
50
Which type of instrument is used to test the armature winding ?
Answer
B. Growler
51
To convert galvanometer into ammeter
Answer
C. A low resistance is connected in parallel
52
Which material is used for transformer bushings ?
Answer
A. Porcelain
53
The starting torque of a three phase induction motor is ______ supply voltage.
Answer
C. directly proportional to square of
54
In all induction instruments, deflection torque is produced due to the reaction
between
Answer
Question Cancelled
55
In a shaded pole motor the revolving field is produced by
Answer
D. shading ring
56
How the voltage is reduced in auto transformer starter at the time of starting ?
Answer
D. by adjusting the tappings by handle
57
Maximum efficiency for a transformer can expect when
Answer
B. Copper loss becomes equal to constant loss
58
Which one is the application of Current Transformer
Answer
A. Tong tester
59
Synchronous motor when used for power factor improvement should be
Answer
C. over excited
60
The following _____ type is not a wattmeter.
Answer
C. electro mechanical
61
Phase sequence of supply given to AC motor means the order of phase attaining
Answer
B. maximum value
62
If the ceiling fan when switched on runs at slow speed in the reverse direction, it can
be concluded that
Answer
C. Capacitors is not effective
63
In a wound three phase induction motor, brushes should be connected to
Answer
C. External connected resistors
64
__________ of transformers are used for high power.
Answer
D. Core type
65
moving coil instrument works on the effect of
Answer
A. Electromagnetic effect
66
In an induction motor, if the flux density of rotor is reduced to half of its normal value,
the torque will
Answer
A. Reduce to half
67
In a transformer minimum voltage regulation occurs when the power factor of the
load is
Answer
B. leading
68
A dynamometer type wattmeter has
Answer
D. Uniform scale
69
Vaccum cleaners generally use ______ motor.
Answer
A. universal
70
Which is the cause for deterioration of transformer oil ?
Answer
Question Cancelled
71
The laws of illumination are applicable
Answer
A. To a point source of light in the absence of reflecting surfaces
72
A total of 20 fluorescent lamps are required to illuminate a surface of 100m2 with an
illumination of 200 lux, taking coefficient of utilisation as 0.5 and depreciation factor
as 1.25. Find out the lumen output of the lamp.
Answer
B. 2500 lumens
73
An incandescent lamp, hung at a height βhβ from a point βPβ, directly below it, produces
an illumination βEβ at βPβ. If the height was reduced by h , what will be the new
illumination at βPβ ?
Answer
C. 16E
74
Which one of the following lamps operates at the best power factor ?
Answer
D. Incandescent lamp
75
Which one among the following lighting schemes produces minimum glare ?
Answer
C. Indirect lighting
76
The voltage drop across an ideal diode when forward biased is
Answer
D. None of these
77
In a dC power supply, a voltage regulator is used to
Answer
C. Both
78
What happens when a zener diode is forward biased ?
Answer
D. None of these
79
In an L-section filter
Answer
C. Inductor is connected in series and capacitor is connected in parallel with
respect to the load
80
Choose the incorrect statement regarding a pure semiconductor.
Answer
C. It obeys Ohmβs law
81
The type of generators used in hydroelectric power plants is usually
Answer
A. Salient pole type alternator
82
Which among the following pairs are not matched ?
Answer
B. Wind Power Plant β Induction motor
83
mPPT is not used in
Answer
C. Hydroelectric Power Plant
84
Which one among the following conditions is most desirable for a power station ?
Answer
A. High load factor and high diversity factor
85
Which one among the following statements is not true regarding generating stations ?
Answer
C. A high value of load factor indicates a highly variable load on the power station
86
Which one among the following statements is not true for an interconnected Grid
System ?
Answer
C. Interconnected grid system avoids the use of old and less efficient plants
87
Pick the odd one out.
Answer
B. Economiser
88
Which one among the following statements is not true regarding a Nuclear Power
Station ?
Answer
B. Nuclear power plants are suitable for supplying power to frequently varying loads.
89
Choose the correct order of components with respect to solar photovoltaic
systems.
Answer
B. PV Cell β PV module β PV Panel β PV Array
90
mention the main component of Biogas.
Answer
B. methane
91
Choose the incorrect statement from the given options.
Answer
B. The phenomenon in which receiving end voltage is less than sending end
voltage is known as Ferranti effect.
92
Which of the following is not true with respect to HVdC transmission ?
Answer
D. The distance of transmission should be below a minimum value for HVdC
transmission to become economical
93
In HVdC transmission, increase in transmission voltage,
Answer
A. Allows to reduce the size of conductors used
94
Which one among the following phenomena does not take place in high voltage AC
transmission ?
Answer
D. None of these
95
Effect of series inductance and shunt capacitance of transmission lines are faced in
Answer
A. EHVAC Transmission
96
In a 3 phase 4 wire 415 V system, a 40 W lamp is connected across R-phase
240
and neutral and a 100 W lamp is connected across y-phase and neutral.
What happens when the neutral is disconnected ?
Answer
B. 40 W lamp glows brighter than 100 W lamp
97
Pick the odd one out.
Answer
Question Cancelled
98
Which one among the following factors does not determine the selection of size of
conductor for overhead transmission ?
Answer
Question Cancelled
99
In India, the frequency of the secondary distribution voltage can vary from
Answer
A. 49.5 Hz to 50.5 Hz
100
Reactors connected in series with the feeders (feeder reactors) are used to
Answer
D. limit the current in case of short circuit
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