| Post Name | Motor Mechanic/ Store Assistant - Ground Water |
|---|---|
| Question Paper Code | 218/2023 |
| Category Code | 184/2022 |
| Date of Test | 4 November 2023 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
during marking, the reference surface is provided by
Answer
B. marking off table surface
2
Scriber is made of
Answer
D. High carbon steel
3
What is determined while measuring a component ?
Answer
A. Actual size
4
In a metric micrometer, one complete revolution of thimble advances
Answer
C. 0.50 mm
5
Clearance between mating parts is measured by
Answer
B. Feeler gauge
6
The best way of avoiding accidents is by
Answer
C. By observing safety precautions
7
Vernier caliper parts used to measure depths of holes
Answer
C. depth measuring blade
8
What is the period referred as golden ?
Answer
A. First 30 minutes
9
What is the use of telescopic gauge ?
Answer
D. measure size of holes
10
Which precision instrument is used for comparing and determining the variation in
size of the component ?
Answer
B. dial test indicator
11
Which of the following statement related to solid type tap wrench ?
Answer
Question Cancelled
12
Screw drivers are specified according to
i. Indian standard number
ii. Width of the tip
iii. The material it is made of
iv. length of the blade
Answer
A. Only ii and iv
13
What is the length of snap head rivet generally used in the shop floor ?
Answer
C. l = T + 1.5 d
14
Which part used in adjustable screw plate die the two die halves are held securely
in a collar ?
Answer
B. Guide plate
15
Which chisel used for cutting oil grooves ?
Answer
D. Half-round nose chisel
16
What is the pitch of hacksaw blade generally for cutting copper ?
Answer
B. 1 mm
17
Bastard file used to
Answer
C. Heavy reduction of material
18
The sensitive bench drilling machine is capable of drilling holes upto _________
diameter.
Answer
C. 12.5 mm
19
Which of the following is related to countersunk tooth type lock washer ?
Answer
B. Used on oval type head screws
20
Which of the following can be used for locking the nuts which are located near an
edge or corner ?
Answer
D. Tab washer
21
Which of the following statements are correct ?
Statement 1 : In the Otto cycle combustion takes place at constant volume.
Statement 2 : In diesel cycle combustion takes place at constant volume.
Answer
C. Only Statement 1 is correct
22
In a two stroke engine, the entry of fresh charge, pushes out the exhaust gases
through exhaust port. This process is known as
Answer
B. Cross Flow Scavenging
23
Which of the following statements are correct ?
Statement 1 : Two stroke engine is simpler, compact and lighter.
Statement 2 : Two stroke engine has lower volumetric efficiency.
Answer
A. Both Statements are correct
24
In an inline 6 cylinder 4 stroke engine a firing impulse occur at every __________
degrees of crankshaft revolution.
Answer
D. 120
25
The distance between the cylinder wall and the piston skirt is known as
Answer
Question Cancelled
26
Which of the following statements are true about valve overlap ?
Statement 1 : Valve overlap helps in scavenging of exhaust gases.
Statement 2 : Valve overlap is the number of degrees of camshaft rotation during
both valves are open.
Answer
C. Only Statement 1 is correct
27
For increasing volumetric efficiency of an engine at higher speeds, which of the
following technologies are used ?
Answer
A. Variable Valve Timing
28
The period in which the injected diesel fuel remaining in the combustion chamber
after the injection stops, continues to burn is known as
Answer
B. After Burning Period
29
_______ helps to reduce the fluctuation of crankshaft speed during an engine cycle.
Answer
C. Flywheel
30
Which of the following statement is correct ?
Statement 1 : For same compression ratio Otto cycle is more efficient than Diesel
cycle.
Statement 2 : For same compression ratio Diesel cycle is more efficient than Otto
cycle.
Answer
C. Only Statement 1 is correct
31
The ratio between Brake power and Indicated power is known as
Answer
A. Mechanical efficiency
32
An engine having stroke equal to its bore is known as
Answer
C. Square engine
33
Which metal is filled inside the poppet valve for cooling purpose ?
Answer
D. Sodium
34
The advantage of using hydraulic tappet is
Answer
C. All of the above
35
The connecting rod big end bearing is connected to
Answer
A. Crank pin
36
The bearing used to prevent to and fro motion of crankshaft in endwise direction is
known as
Answer
C. Thrust Bearing
37
The device used to prevent engine roll tendency about its own axis in a transverse
mounted engine is known as
Answer
B. Torque Strut
38
What is the advantage of offsetting Piston pin towards the major thrust side ?
Answer
D. To minimizing piston slap
39
The difference between crankshaft journal diameter and the bearing diameter is
known as
Answer
A. Oil Clearance
40
Firing order of an inline 6 cylinder engine
Answer
B. 1-5-3-6-2-4
41
In an IC engine the worn out piston rings causes
Answer
C. High oil consumption
42
Which one of the following statement is not true in pump circulating system ?
Answer
D. The fan belt is connected by camshaft, waterpump and alternator
43
The heat transfer from coolant to air in radiator of an automobile engine takes
place
Answer
Question Cancelled
44
Backlash between the oil pump gears is measured by
Answer
C. Feeler gauge
45
In the bellows type thermostat, the metallic bellows filled with
Answer
A. Ethyl
46
The thermostat valve starts to open at about
Answer
C. 70 – 80 °C
47
Which one of the following is an example of engine oil ?
Answer
A. SAE 30
48
In rotor type oil pump the inner rotor has
Answer
B. 4 lobes
49
When by pass re-circulation is done by the cooling system
Answer
C. Thermostat valve closed
50
The oil pressure relief valve is fitted to the
Answer
B. Outlet of the oil pump
51
What is the name of pipe line from FIP to injector in a diesel fuel feed system ?
Answer
A. High pressure pipe
52
Why is there a vent hole provided either in filler neck or cap in an engine fuel tank ?
Answer
B. To maintain atmospheric pressure
53
Which component is develop the diesel pressure in the CRdI engine ?
Answer
D. High pressure pump
54
Which of the following statement is/are correct ?
i. Volatility is the ability of the gasoline to evaporate
ii. diesel and gasoline contain some sulphur
iii. Diesel engine fuel is highly refined distillate fuel obtained from fractional
distillation of crude oil
Answer
D. All of the above i, ii and iii
55
Which type of carburettor is fitted under the inlet manifold of an engine ?
Answer
B. Up draft
56
Which one of the following does the mAP sensor measure ?
Answer
C. Intake manifold pressure
57
What is the proper order of fuel feed system in a conventional diesel engine ?
Answer
B. Fuel tank, feed pump, fuel filter, FIP, injector
58
Which fuel system develops the high diesel pressure by hydraulic energy ?
Answer
C. HEUI fuel system
59
Why baffles are provided in the fuel tank ?
Answer
A. minimize the slashing of fuel due to movement inside the tank
60
Which of the following statement is/are correct about HEUI ?
i. HEUI fuel system represents one of the most significant innovations in diesel
engine technology
ii. The highly sophisticated HEUI system uses mechanical energy instead of
hydraulic energy to operate fuel injectors
iii. HEUI made easy of many limitations of mechanical and coventional electronic
injectors
Answer
A. Only i and iii
61
Which of the following statement is/are correct about functions of air cleaner ?
i. It cleans the intake air
ii. It reduces the noise of the intake air
iii. It act as a flame arrester during engine backfire
Answer
D. All of the above i, ii and iii
62
Which type of mufflers are designed to produce anti noise without restricting exhaust
flow ?
Answer
C. Electronic type
63
What is the purpose of catalytic converter ?
Answer
C. Control the emission
64
What is the primary purpose of a Variable Intake manifold system in a Electronic
Fuel Injection ?
Answer
A. To enhance the volumetric efficiency
65
It is a device which increase the pressure of the air fuel mixture from the carburettor
before it enters the engine. It is fitted in the way of intake manifold.
Answer
A. Super charger
66
Which one of the device changes carbon monoxide into carbon dioxide in the exhaust
gas ?
Answer
C. Catalytic converter
67
Which one of the emission control system that blow by gases are feed into the inlet
manifold of a running engine ?
Answer
B. Positive crank case ventilation
68
Which material is generally used for construction of exhaust manifold of an engine ?
Answer
D. Cast iron
69
Which of the following statement is/are correct about SCR ?
i. SCR is to reduce harmful Nitrogen Oxides (NOX) emission from diesel engines
ii. SCR reduces NOX emission upto 90%
iii. SCR process requires diesel exhaust fluid
Answer
D. All of the above i, ii and iii
70
It is a device which is located on top of the fuel tank or part of the expansion overflow
tank. This device prevents liquid gasoline from entering the vent line to the EVAP
canister.
Answer
B. liquid vapour separator
71
The oversize pistons are generally available ___________ inch above the standard
size.
Answer
C. 0.01
72
Which of the following is not used to measure the engine bearing clearance ?
Answer
A. Telescopic gauge
73
The difference of readings in the top and bottom in the same direction in a cylinder bore
is known as
Answer
B. Taper
74
A dial test indicator is used to check the
Answer
D. Crankshaft end play
75
Valve stem to valve guide clearance in case of exhaust valves will not exceed
Answer
B. 0.15 mm
76
What is the result of a thick cylinder head gasket used instead of a standard one ?
Answer
C. decreasing compression ratio
77
It is not a reason for diesel engine does not start or stalls just after starting
Answer
D. Clogged oil filter
78
The piston ring end clearance is measured with a
Answer
A. Feeler gauge
79
Compression pressure reading of adjacent cylinders are same and less than specific
value indicate
Answer
C. damaged cylinder head gasket
80
To check the mechanical condition of the engine, the vacuum gauge is connected
on the
Answer
B. Induction manifold
81
Which is mathematical formula for Electric power ?
Answer
C. V × I
82
The amount of voltage differs from point to point in
Answer
A. Series circuit
83
What is the colour used for 20 Amp fuse rating ?
Answer
D. yellow
84
Which information is printed on the body of the resistor ?
Answer
C. Power rating
85
The ability to store energy in the form of electric charge is
Answer
A. Capacitance
86
The capacity of a battery is determined by number of plates per cell and
Answer
B. Size of plates
87
The specific gravity reading 1.120 indicate which state of charge of Lead acid battery ?
Answer
C. Fully discharged
88
What is the cause for battery parasitic drain ?
Answer
B. Sulphation formed
89
The device which opens or closes an auxiliary circuit under predetermined conditions
in the main circuit is called
Answer
A. Relay
90
Which principle is applied in solenoid switch ?
Answer
D. Electromagnetism
91
Which of the following statement is/are correct ?
i. In alternator emf is generated in the stator coil
ii. diodes are used to convert AC to dC in alternator
iii. Current regulator is used in alternator to regulate the current flow
Answer
A. Only i and ii
92
Which of the following statement is/are correct ?
i. Commutator is used to convert AC to dC in an alternator
ii. Worn out drive belt results noisy alternator
iii. Cut out relay is used with alternator
Answer
C. Only ii
93
The speed of dC generator at which its output voltage just rises above the voltage of the
battery being charged is known as
Answer
B. Cutting in speed
94
Which of the following statement is/are correct ?
i. In a dC generator emf is generated in armature
ii. Current regulator, voltage regulator and cut out relay used with dC generator
iii. Slip rings are used in dC generator
Answer
C. Only i and ii
95
Ignition warning light is used to identify the fault in
Answer
B. Charging system
96
loose or worn out alternator drive belt results
Answer
D. All of the above
97
Possible causes of ‘Charge indicator light flickers while driving’ could be
Answer
C. loose or worn alternator drive belt
98
Which of the following statement is/are correct ?
i. Cut out relay is used with alternator
ii. Voltage regulator is used with dC dynamo
iii. Current relay is used with alternator
Answer
B. Only ii
99
Which of the following statement is/are correct ?
i. In alternator star connection stator will start charging at lower speeds
ii. In alternator with delta connection stator will produce high output at lower speed
iii. In alternator with delta connection stator will produce lower current at lower speed
Answer
C. Only i and iii
100
low or unsteady output from a dC generator due to
Answer
D. All of the above
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