| Post Name | Operator Grade III |
|---|---|
| Question Paper Code | 116/2025 |
| Category Code | 591/2024, 592/2024 |
| Date of Test | 19 September 2025 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
What term is used to keep needed items in correct place to allow for easy and immediate
retrieval in 5S concept?
Answer
B. Set
2
What is the accuracy of caliper using with steel rule?
Answer
C. 0.5 mm
3
What is the colour code of bins for food wastage?
Answer
D. Black
4
The SI unit of temperature is :
Answer
B. Kelvin
5
What stands for ‘ABC’ in the first aid?
Answer
C. Airway, Breathing, Circulation
6
What are the measuring angles of a square head in combination set?
Answer
A. 45º and 90º
7
What is the name of the fire involving metals?
Answer
D. Class D fire
8
What is the least count of the vernier bevel protractor?
Answer
B. 5 minutes
9
What is the period of golden hours in treating serious condition person?
Answer
C. First 30 minutes
10
The outside micrometer works with the working principle of
Answer
C. Screw and nut
11
What are the three factors causes fire?
Answer
A. Fuel, Heat, Oxygen
12
Which one of the following forms the hypotenuse of the right angle triangle while
checking with sine bar?
Answer
B. Sine bar length
13
Which of the following is the best method to avoid accident?
Answer
D. By observing safety precautions related to job, machine and working place
116/2025 4 A
14
What is the pitch of the spindle thread in metric outside micrometer?
Answer
B. 0.5 mm
15
Which of the following comes under the mechanical hazards?
Answer
B. Unguarded machinery
16
What is the act of joining the slip gauges together for building up sizes?
Answer
A. Wringing
17
What is the first aid treatment for the third degree burns?
Answer
C. Cover with a damp cloth
18
What is the shape of dial in a vernier bevel protractor?
Answer
C. Circular
19
One micrometer is equal to ___________ mm.
Answer
C. 0.001 mm
20
Which of the following comes under machine safety?
Answer
B. Switch off the machine immediately if something goes wrong
21
What is the accuracy of Engineer’s steel rule?
Answer
D. 0.5 mm
22
Which type of screw is used to fix the hard jaw plate of the bench vice?
Answer
C. Counter sink screw
23
Puddling furnace is used to produce _____________metal.
Answer
A. Wrought iron
24
Which one of the following elements of a thread cannot be checked with screw pitch
gauge?
Answer
B. Lead
25
The reamer teeth are unevenly spaced because :
Answer
B. They can reduce chattering
26
Which type of flame is used to weld brass metal?
Answer
C. Oxidizing flame
27
Main purpose of Annealing is :
Answer
A. To improve machinability
28
While grinding a chisel a slight convexity provided to the cutting edge is :
Answer
B. Prevent digging of the chisel in work piece
29
Material difficult to be spot weld is :
Answer
B. Aluminium
30
In a letter drill size, the size of the drill ‘A’ is equal to :
Answer
A. 5.944 mm
31
Heating of a plain carbon steel uniformly above the lower critical temperature, causes
the commencement of formation of solid solution is called :
Answer
C. Austenite
32
Melting point of copper is :
Answer
D. 1083°C
33
Which plug gauge has GO and NO GO end in same side?
Answer
C. Progressive plug gauge
34
The tap used to cut full thread in blind hole is :
Answer
C. Bottoming tap
35
Which one of the mechanical properties enables metal to be made into thin sheet is :
Answer
B. Malleability
36
Which metal is ideally suited for anodizing?
Answer
C. Aluminium
37
Lip clearance angle of twist drill is :
Answer
B. 8 − 12°
38
Which gas is used for TIG welding of aluminium?
Answer
D. Argon
39
Alloying elements in gun metal is :
Answer
A. Copper + Zinc + Tin
40
When the size of taper shank drill is larger than the machine spindle, the device to hold
the drill is a
Answer
B. Drill socket
41
In terms of measurement what is the relationship between crank throw and stroke of an
engine?
Answer
B. Throw is half of the stroke
42
The burning property of Gasoline fuel is determined by its :
Answer
A. Octane number
43
What is the material used in dry type air filter?
Answer
D. Paper
44
What is the effect of excessive back pressure?
Answer
B. Reduce volumetric efficiency
45
Included angle of isometric thread :
Answer
C. 60°
46
An engine cylinder block with all other parts removed is called
Answer
C. Bare block
47
Which is the ratio of power delivered and power available in the engine?
Answer
C. Mechanical efficiency
48
V- belts transmit more power without slip as compared in flat belt because :
Answer
A. V-belt does not reach the bottom of the groove
49
Rope drives are used to transfer power between two parts which are at :
Answer
B. Moderately long distance
50
The cam shaft drive which does not require lubrication is :
Answer
B. Toothed rubber belt
51
Type of bevel gear used in non parallel non intersecting shaft :
Answer
C. Hypoid bevel gear
52
Type of clutch used in two wheelers :
Answer
C. Multi plate clutch
53
The bearing that carry heavy radial and axial loads:
Answer
C. Taper roller bearing
54
In a two-stroke engine how many rotations of the crank shaft required to open the intake
port in two times?
Answer
B. Two rotation
55
A sliding bearing which operates without any lubricant present is called :
Answer
A. Zero Film bearing
56
The type of key used in muff coupling :
Answer
C. Gib-head key
57
Which is the amount of valve train movement produced by the cam lobe?
Answer
A. Camshaft lift
58
Die stock is used to :
Answer
D. Hold the die
59
Which one of the following is used to start internal threading?
Answer
A. Taper tap
60
The most important characteristic of lubricating oil is its :
Answer
A. Viscosity
61
Most commonly used lubricants in automobiles :
Answer
C. Mineral oil
62
If IHP and BHP of an engine is given then its FHP is :
Answer
D. FHP = IHP – BHP
63
Ball bearing on the shaft is an example for :
Answer
B. Interference fit
64
The dimension of a hole is 40 ++00..028
040 mm, which size of the following is within tolerance?
Answer
C. 40.038 mm
65
Under the terminology of the TS system of limits the term ‘tolerance’ is defined as the
difference between the :
Answer
C. Maximum limit and minimum limit
66
In the BIS system of limits and fits the standard range of sizes covered are :
Answer
A. 0 to 500 mm
67
Grade of the hole is H6.Which of the manufacturing process is used?
Answer
B. Hand reaming
68
Which of the following have threads at both ends?
Answer
C. Stud
69
Type of thread used in lead screw of lathe:
Answer
D. ACME Thread
70
What is used in carburetion system to suppress the engine induction system?
Answer
B. Air cleaner
71
Electrons while flowing pass through the molecules or the atoms of the conductor collid
with other atoms and electrons, there by producing :
Answer
C. heat
72
The atomic weight of material is weight of :
Answer
D. protons and neutrons
73
The maximum number of electrons possible third extranuclear orbit or M shell is :
Answer
B. 18
74
The material whose resistance at ordinary temperature lie in between of typical metals
and typical insulators are called :
Answer
C. semiconductor
75
Resistance of a conductor directly related to :
Answer
B. length of conductor
76
Which of the following is not a source of electricity?
Answer
D. rectifier
77
Unit or electrical inductance
Answer
C. Henry
78
The term used for comparing insulation properties of insulating materials :
Answer
B. die-electric strength
79
From the following materials which has nearly zero temperature coefficient :
Answer
A. Manganin
80
Mica, Ceramics, Glass, Teflon are including which class of insulating materials?
Answer
B. Class C
81
The division of current in the branches of a parallel circuit is directly proportional to :
Answer
A. Conductance
82
Electric pressure measured by :
Answer
C. volt meter
83
The resistance of 30 Ω, 15 Ω, and 5 Ω are connected in parallel, their combined
resistance will be :
Answer
D. less than 5 Ω
84
Wheatstone bridge is used to measure the DC resistance of various types of wires for :
Answer
C. quality control of wire
85
In any electric network, the algebraic sum of currents meeting at a point is zero, it
derived by following any law :
Answer
C. Point law
86
If the diameter of a metal wire of a given length is doubled, its resistance will :
Answer
D. be ¼ time
87
Arc heating occurs when the air between electrodes of opposite polarity becomes :
Answer
B. ionised
88
Which following circuit will be voltage source produce the maximum current?
Answer
C. 10V across two 10 Ω resistance in parallel
89
The resistance of a given wire is 2 Ω. The resistance of the other wire made of same
materials having twice length and twice the cross-sectional area is :
Answer
A. 2Ω
90
Which of the following material has a negative temperature co efficient of resistance?
Answer
C. Carbon
91
A heater element has to be made of nichrome wire having a resistance of 1.1 Ω /meter.
If heater is to have a rating of 1100 W on 220 V supply, how much length of element is
required :
Answer
D. 40 m
92
The material used for fuse element must have :
Answer
C. Low melting point and high specific resistance
93
Alternator of a central power station will have :
Answer
B. revolving field winding
94
A surge tank is attached to the penstocke pipe hydro power plant. What its important?
Answer
C. avoid water hammering effect
95
Average wind velocity considered to suitable for establishing commercial wind farms :
Answer
B. 18 kmph
96
In a cable, electric stress is maximum at :
Answer
A. the surface of conductor
97
Material used for making solar cell :
Answer
C. silicon
98
The modern steam turbine are :
Answer
C. impulse reaction turbine
99
A typical output of solar cell :
Answer
B. 0.26 volt
100
Full form of FF in the solar field :
Answer
B. Fill Factor
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