| Post Name | MOTOR MECHANIC, TRADESMAN (Automobile Mechanic) - HEALTH SERVICE, TECH. EDN. |
|---|---|
| Question Paper Code | 072/2023 |
| Category Code | 398/2020, 224/2021, 765/2021 |
| Date of Test | 14 June 2023 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Which statement is wrong ?
i. Helmet is a head protection equipment.
ii. Apron is a hand protection equipment.
iii. Face shield is help to protect face from UV rays.
iv. Ear plug to protect from high noise level.
Answer
B. ii only
2
maintenance carried out after machine stops due to some fault is called
Answer
D. Breakdown maintenance
3
Which statement is correct ?
i. Starving is the process of removing fuel from a fire.
ii. Smothering is the process of isolate the fire from Oxygen.
iii. Cooling is the process of reduce temperature in a fire.
Answer
A. all of these i, ii and iii
4
Which type locking device is used in Fully floating type Piston and Connecting rod
assembly ?
Answer
C. Internal Circlip
5
Which statement is correct ?
i. morse taper is related to taper shank drill bit.
ii. The point angle of a standard drill bit is 189°.
iii. Reamer is a multi point cutting tool.
iv. Screwdriver shank is made of mild steel.
Answer
B. both i and iii
6
Which type Chisel is used to break metal after chain drilling ?
Answer
A. Web chisel
7
Which statement is wrong ?
i. In a vernier caliper main scale graduations are marked on beam.
ii. The accuracy of outside micrometer is 0.01 mm.
iii. depth bar is the part of inside micrometer.
iv. Jenny caliper is a marking tool.
Answer
D. iii only
8
Which tool is used to make internal thread ?
Answer
A. Tap and wrench
9
Which statement is wrong ?
i. 2 stroke engine makes power every 360° of rotation.
ii. 4 stroke engine makes power every 240° of rotation.
iii. Glow plug is related to mPFI engine.
iv. 4 cylinder diesel engine has 12 V electrical system.
Answer
B. both ii and iii
10
Which type valve is used in a 4 stroke diesel engine ?
Answer
C. Poppet valve
11
The distance between TdC and BdC is called
Answer
C. Stroke
12
Which statement is correct ?
i. The oil pressure gauge indicates the actual oil pressure developed in the oil
gallery.
ii. The oil pressure gauge indicates the actual oil pressure developed in the oil
filter.
iii. The oil pressure gauge indicates the actual oil pressure developed in the oil
sump.
iv. The oil pressure gauge indicates the actual oil pressure developed in the oil
cooler.
Answer
A. i only
13
Which is related to a 4 stroke diesel engine ?
Answer
D. Overhead camshaft
14
Crush and spread is related to
Answer
C. Shell bearing
15
The mass of air required to burn a unit mass of fuel with no excess of oxygen or fuel
left over is known as
Answer
B. Stoichiometric ratio
16
Catalytic convertor is the part of
Answer
D. Exhaust emission
17
The unit of engine torque is mentioned in
Answer
B. Nm
18
Which statement is correct ?
i. Flywheel is mounted on engine Crankshaft.
ii. Connecting rod big end bearings are shell bearings.
iii. Piston rings are made of Aluminium alloy.
iv. The ratio of Crankshaft and Camshaft is 1 : 2.
Answer
A. both i and ii
19
The piston has a extra groove between piston head and top ring groove is known
as
Answer
D. Heat dam piston
20
Which one is not belongs to 5S concept ?
Answer
C. Strength
21
The float unit is the part of
Answer
D. Fuel gauge
22
Which statement is correct ?
i. Oil pan is made of pressed steel.
ii. Oil pump is driven by engine camshaft.
iii. Piston made of Aluminium alloy.
iv. Flywheel works as a part of clutch.
Answer
B. all of these i, ii, iii and iv
23
The firing order of a 6 cylinder diesel engine is
i. 1 – 5 – 3 – 6 – 2 – 4
ii. 1 – 4 – 2 – 6 – 3 – 5
iii. 1 – 6 – 5 – 3 – 2 – 4
iv. 1 – 3 – 4 – 2 – 6 – 5
Answer
D. both i and ii
24
The qualities of a bearings are
i. Fatigue strength
ii. Embedability
iii. Conformability
iv. Thermal conductivity
Answer
C. all of these i, ii, iii and iv
25
Which statement is correct ?
i. Water pump is driven by engine pulley.
ii. Thermostat valve is fitted between water outlet of the cylinder head and the
inlet of the radiator.
iii. Radiator cores are made of high carbon steel.
iv. Inter cooler is the part of cooling system.
Answer
A. both i and ii
26
Inlet valves are made to open certain degree earlier than TdC is called
Answer
B. lead
27
Which statement is wrong ?
i. The Gudgeon pin is supported on piston pin boss.
ii. In a piston minimum number of compression rings are 2.
iii. The portion below the Gudgeon pin is called land.
iv. Compression rings are made of stainless steel.
Answer
D. Both iii and iv
28
What are the causes of high oil consumption in an engine ?
Answer
A. Worn out piston and cylinder wall
29
Excessive tappet clearance will effect
i. Valve lag
ii. Noise in operation
iii. Reduce swept volume
iv. Charge leakage
Answer
B. both i and ii
30
Which statement is correct ?
i. Oil pump is driven by compressed air.
ii. Water pump is driven by engine pulley.
iii. Cooling fan is driven by electric motor.
iv. Thermostat valve is helps to over heat engine.
Answer
C. both ii and iii
31
What will happen if the engine oil exceeds prescribed limit ?
Answer
A. Oil leakage
32
The purpose of Flywheel ring is
Answer
C. Starting purpose
33
The number about diesel engine which deals with engine knocking is
Answer
B. Cetane Number
34
The secondary filter of diesel fuel system is made up of
Answer
C. Paper Element
35
The Fuel Feed pump is driven by
Answer
B. FIP Camshaft
36
In HEUI injector which type of energy is used to actuate the diesel fuel injectors ?
Answer
C. Hydraulic Energy
37
EGR reduces the ___________ content of emission.
Answer
A. NOx content
38
In CRdI System high pressure pump develops pressure up to ____________ bar.
Answer
A. 200 to 2000
39
What is EdC ?
Answer
A. Electronic diesel Control
40
Composition percentage of dEF in selective catalytic reduction is
Answer
D. 67.5% de-ionized water 32.5% urea
41
_____________ are provided in the fuel tank to minimize the slushing of fuel due to
movement inside the tank.
Answer
C. Baffles
42
The cold starting device used in modern diesel engine is
Answer
C. Glow Plug
43
Working Principle of clutch is
Answer
C. Friction
44
Position of clutch in Transmission system is
Answer
B. In between engine flywheel and gear box shaft
45
Fluid Coupling is generally used with
Answer
B. Epicyclic gear box
46
Working Principle of Flywheel is
Answer
B. Inertia
47
The function of gear box is
Answer
A. Change torque and speed
48
Throw out bearing is a part of
Answer
A. Clutch System
49
What do you mean by CVT ?
Answer
C. Continuously Variable Transmission
50
Which type of joint permit small diffraction angle and linear variations ?
Answer
A. Flexible disc
51
Which type of gear converts rotary motion into linear motion and viceversa ?
Answer
B. Rack and Pinion
52
What is the advantage of dog Clutch ?
Answer
A. No possibility of slip
53
Which part of dual mass flywheel isolate the flywheel mass system of the engine ?
Answer
B. Vibration damper
54
What is the advantage of using power steering system ?
Answer
D. To control vehicle with less effort
55
Which type of spring will have good load carrying capacity and do not have noise in
the suspension system ?
Answer
Question Cancelled
56
Which part of electronic power steering rivert back to manual steering in case of
failure in power steering ?
Answer
C. Fail Safe Relay
57
What is the heart of Integral Power Steering System ?
Answer
Question Cancelled
58
Which angle helps in self centering of wheels after negotiating turn ?
Answer
B. Kingpin Inclination
59
What is the purpose of caster in wheel alignment ?
Answer
A. maintain directional stability and control
60
What is the advance of using Independent suspension system ?
Answer
D. Spring weight is less
61
Speciality of Ackerman Steering mechanism is
Answer
B. Simplicity and less wear
62
Which part of coil spring allows angular movement of linkages ?
Answer
B. Ball joint
63
Which system provides between axles and chassis ?
Answer
D. Suspension System
64
What is the maximum permitted diffraction angle in tripod joint ?
Answer
C. 26 degree
65
Which type of tyre does not need removal from wheel for puncture repair ?
Answer
B. Tubeless tyre
66
If the tyre is over inflated, the area of contact with road will be
Answer
D. At the centre
67
Which of the following statements are correct regarding ‘Reversible wheel’ ?
i. Wheel disc can be mounted on either face to provide inset/outset.
ii. The wheel track can be decreased or increased.
iii. Wheel disc in which attachment face of disc in the centre line of rim.
Answer
A. i and ii
68
Why nitrogen tyres are preferable in aviation applications ?
Answer
C. It doesn’t expand and compress like air in altitude and temperature change
69
Weak brake shoe retracting spring may lead to
Answer
D. Brake drag
70
When brake is released, the pressurized fluid in brake line returned to the master
cylinder by
Answer
A. lifting the check valve from its seat
71
Which of the following statement(s) is/are not correct regarding ABS brake system ?
I. It retains directional stability of vehicle.
II. It prevents wheel lock up during panic braking.
III. Increase split surface braking effect.
Answer
Question Cancelled
72
Choose the correct statement(s) regarding Engine braking.
i. Slowing the engine by releasing engine compression.
ii. Stopping a diesel engine by closing off the exhaust path from the engine.
iii. Slow down the diesel engine by utilizing exhaust back pressure.
Answer
Question Cancelled
73
4 sensor – 4 channel type ABS system usually employed in
Answer
B. Front engine front driving vehicles
74
In disc brakes, retraction of piston during brake release is caused with the help of
Answer
D. Piston sealing ring
75
Care should be taken while using ohmmeter is
Answer
B. do not connect to a live circuit
76
Which electrical instrument is known as ‘VOm’ meter ?
Answer
D. multimeter
77
Semi conductors are materials whose valency can be said to be
Answer
D. 4
78
Ignition coil can be said to be a type of
Answer
C. Step up transformer
79
Spark plug with end cap design improves engine performance by
Answer
A. Improving combustion swirl
80
Which of the following statements are correct regarding ‘distributor less ignition
system’ ?
I. Two spark plugs are ignited at the same time.
II. Two power stroke happens at the same time.
III. Ignition coil having two primary and two secondary windings.
Answer
Question Cancelled
81
Output current of an alternator is regulated by
Answer
D. Self current limiting action
82
In charging system, the charging indicating lamp connected between
Answer
A. Alternator field terminal (1G) and (L) terminal of an alternator
83
Why series wound starter motor is generally used in automobiles ?
Answer
D. High starting torque
84
Starter motor brushes are given a curvature at bottom for
Answer
A. Increase contact area with commutator
85
‘Indexing pin’ in the bulbs are used to
Answer
C. Position the bulb terminals properly in the socket
86
Choose the wrong statement regarding ‘Tail lamp operation’.
i. Tail lamp will illuminate only when brake pedal is pressed
ii. Tail lamp will illuminate with headlights
iii. It give indication to the vehicles behind driving in nights
Answer
A. i
87
Choose the color used for pilot lamps.
Answer
B. Green
88
The receiver drier with desiccant in Car AC is located at
Answer
A. Between condenser and expansion valve
89
The component used in AC system which transfer heat from passenger compartment
into the Refrigerant
Answer
D. Evaporator
90
The component which forms the interface between the high pressure side and low
pressure side of the refrigerant circuit
Answer
B. Expansion valve
91
ICAT stands for
Answer
C. Intelligent Computerized Anti Theft system
92
The propellant unit in air bag inflation contains
Answer
B. Sodium azide (NaN3) and potassium nitrate (KNO3)
93
How many GPS satellites are minimum needed to plot a 3d position ?
Answer
B. 4
94
The diagnostic Trouble Code starting ‘U1XXX’ indicates
Answer
D. Error code related to class 2 network and for manufacturer specific code
95
As per mV Act, the vehicle is said to be ‘light motor vehicle’ if
Answer
C. Gross vehicle weight should be within 7000 kg
96
Choose the correct method of measuring ‘overall length’ of a vehicle.
i. measurement between extreme projection planes of the vehicle including any
spare wheel or spare wheel bracket fitted to the vehicle.
ii. measurement between extreme projection planes of the vehicle excluding any
fire-escape fixed to a vehicle.
Answer
B. ii only
97
In EFI, the idle speed of engine is controlled by ECU with the actuation of
Answer
C. IAC valve
98
Function of Inertia sensor
Answer
A. Shutt off the fuel pump in the event of an accident
99
At low engine speed in Variable Length Intake Manifold system, air flow redirected to
Answer
B. longer path with limited cross sectional area
100
lambda sensor produce greater voltage if
Answer
C. less oxygen in exhaust
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