| Post Name | Tradesman(Two Wheeler, Three Wheeler Maintenance) |
|---|---|
| Question Paper Code | 064/2024 |
| Category Code | 421/2023 |
| Date of Test | 23 May 2024 |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Which is the reason to decrease the volumetric efficiency of an engine?
Answer
C. Excessive back pressure
2
When does a fresh charge escapes from the petrol engine exhaust?
Answer
B. During valve overlap
3
Injection timing of the diesel in a distributor type fuel injection pump is controlled by :
Answer
D. Rotating the cam ring
4
Technician A says the Diesel engine compresses air alone in the compression stroke.
Technician B says the fuel is ignited by the heat of compression. Who is right?
Answer
B. Both A and B
5
Which action the spindle only move up and down in feed pump?
Answer
A. Idling action
6
In a six cylinder engine, the power impulse occurs after ‘x’ degrees of crank shaft rotation.
Where ‘x’ is :
Answer
B. 120
7
The cross-sectional area of one cylinder of an engine multiplied by its stroke is called :
Answer
C. Swept volume
8
Scavenging is done for the following purpose :
Answer
B. power output
9
The two firing orders used on four cylinder in-line engines are :
Answer
D. 1-2-4-3 and 1-3-4-2
10
If the temperature of intake air is internal combustion engine increases, then its efficiency
will :
Answer
C. decrease
11
A dish in the piston head is employed to :
Answer
D. Control compression ratio
12
Which is used to determine the stroke of an engine?
Answer
B. Throw
13
All of these statements about engine oil pumps are true except :
Answer
B. A calibrated spring holds the oil pressure relief valve open
14
Excessive back-and-forth movement of the crankshaft is prevented by
Answer
C. thrust bearing
15
The lifetime of a cylinder block can be increased by using :
Answer
D. liner
16
Which measuring instrument used to check the fly wheel face out?
Answer
A. Dial indicator
17
On the compression stroke the piston rings are pressed against :
Answer
C. bottom of groove
18
Maximum permissible ovality in a cylinder is usually :
Answer
B. 0.01 mm
19
In the Cam, the distance between the base circle and the nose is called :
Answer
D. Lift
20
What is the type of hardening done on crankshaft?
Answer
A. Induction hardening
21
In bellows type thermostat valve, the valve opening is depending on :
(i) Coolant temperature
(ii) Vapour pressure in the bellows
(iii) Coolant pressure
Answer
D. All of the above (i), (ii) and (iii)
A 5 064/2024
22
What is the function of radiator in a cooling system?
(i) Remove the excess heat from the coolant
(ii) Always remove the heat from the coolant flowing through it
(iii) It will act as a heat exchanger
(iv) Coolant flows from upper tank to lower tank through narrow tubes connected between
them
Answer
Question Cancelled
23
Radiator pressure cap consist of :
(i) Vaccum valve
(ii) Thermo - responsive valve
(iii) Pressure blow - off valve
(iv) Fusible plug
Answer
C. Only (i) and (iii)
24
What is the importance of expansion reservoir in a cooling system?
Answer
D. All of the above
25
Coolant pumps are of :
Answer
C. Centrifugal type
26
Oil pressure warning light switch is :
Answer
B. A NO type [Normally Open type]
27
Which type of lubrication system used in racing car engines?
Answer
D. Dry-sump system
28
Which one of the following types of oil pump has an advantage of a continuous oil flow?
Answer
D. Vane pump
29
Engine blow-by gas increases with :
Answer
D. All of the above
30
In a multi-grade lubricating oil SAE 10W/30, the numbers 10 and 30 are representing :
Answer
C. Both
31
What is the most likely cause of an engine misfire?
Answer
A. Faulty ignition system
32
The warpage of cylinder head is checked with
Answer
A. Metal rule
33
For checking the alignment of the crankshaft, the best method is to place it :
Answer
Question Cancelled
34
What does white smoke from the exhaust typically indicates?
Answer
C. Coolant or water vapour in combustion chamber
35
Which of the following can indicate a potential engine problem and require immediate
attention?
Answer
A. Check engine light illuminated
36
What is the significance of a tapping or tickling noise from the engine?
Answer
A. Indicates worn valve lifters or other valve train issues
37
If a worn main bearing requires replacement, you should replace :
Answer
D. All main bearings
38
Thrust - bearing wear will cause excessive :
Answer
C. Crankshaft endplay
39
To check piston-ring end gap, install the ring :
Answer
B. At the bottom of the cylinder
40
In the pin fits too loosely in the piston :
Answer
A. Install the new piston and pin set
41
The torque transmission by clutch depends upon the :
Answer
D. All of these
42
The coefficient of friction for the clutch facing is approximately :
Answer
B. 0.4
43
In the fluid coupling, the vortex flow is maximum when the slip is :
Answer
D. 100%
44
The purpose of the fluid coupling is to act as
Answer
C. Flexible power transmitting coupling
45
Quality of diesel fuels is denoted as :
Answer
A. Cetane No.
46
Iso octane :
Answer
C. Has octane number of 100
47
To reduce the possibility of knock in CI engines, the first elements of fuel an air should have :
Answer
D. All of these
48
Stoichiometric air fuel ratio of petrol is roughly :
Answer
C. 14.7 : 1
49
Economizer is used to provide enriching mixture during :
Answer
D. Full throttle operation
50
The compression ratio of alcohol fuel lies between :
Answer
A. 11 : 1 to 13 : 1
51
A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of :
Answer
A. 75% iso-octane and 25% normal hepatane
52
Hydrogen can be used in S.I. engines by :
Answer
D. All of these
53
The pump outlet pressure should be approximately :
Answer
B. 30 kPa
54
The specific gravity of diesel is about :
Answer
C. 0.85
55
What is the sequence of fluid circulation is torque converter?
Answer
C. Impellor – Turbine – Stator
56
The probable cause for gear jumps out at mesh is :
Answer
D. Any of these
57
The limited slip differential (LSD) mechanism causes in action when?
Answer
B. One tyre encounters a slippery section of roads
58
In carburettors, the top of the fuel jet with reference to the petrol in the float chamber :
Answer
B. is kept at slightly higher level
59
At very low temperatures the ice tends to from in the carburettor in the :
Answer
Question Cancelled
60
The main metering system of the carburettor controls the fuel feed for :
Answer
C. Both
61
In the given tyre specification, P195/65 R15 89H which number indicates the aspect ratio
of tyre?
Answer
B. 65
62
The grooves that molded into the ribs of tyre treads are termed as :
Answer
D. sipes
63
The metal road running between the opposite upper or lower control arms, for reducing
rolling is called :
Answer
C. stabilizer rod
64
Progressive rate coil spring means the spring with :
Answer
B. constant wire diameter, cylindrical shape and unequally spaced coils
65
The possible cause of vehicle sagging on one side is :
Answer
D. broken suspension spring
66
The over inflation of tyre causes :
Answer
C. rapid wear at tyre centre
67
Which statement is false about metering valve?
Answer
A. when the brakes are released, metering valve is open
68
Brake binding may be caused by :
Answer
B. blocked by pass port in master cylinder
69
The component of air brake system which convert the pressure energy of compressed air into
mechanical energy is :
Answer
C. Brake chamber
70
Which of the following statement is false about engine exhaust brake?
Answer
A. Engine exhaust brakes is used for stop the vehicle while descending downhill
gradient.
71
What is the necessary condition for a conductor to obey Ohm’s law?
Answer
A. Temperature of the conductor remains constant
72
Which of the following statement is false about battery?
Answer
B. For charging several batteries, these batteries are connected parallel to each
other.
73
Which of the following does not cause the deterioration of the plates of lead acid battery?
Answer
A. Low specific gravity of electrolyte
74
The part of lead acid battery which hold the active material is :
Answer
B. Grid
75
Which of the following statement is false about alternator?
Answer
B. Alternator circuit uses cut off relay
76
Which of the following statement is false about DC generator?
Answer
D. For same output, weight of dc generator is less compared to alternator
77
The material filled inside the bulb in halogen head light is :
Answer
B. Iodine vapor
78
The reflector used for sealed beam head light is usually coated with :
Answer
C. Vaporized aluminum
79
Which of the following is not a cause for the starter motor doesn’t start and the dash board
lights dim heavily?
Answer
B. The circuit is open somewhere
80
The charge indicator light is ON during engine is running means :
Answer
C. Generator is not charging the battery
81
Which component of battery coil ignition system connect and disconnect primary circuit from
the battery?
Answer
Question Cancelled
82
Which component of Ignition system prevent arcing between CB points?
Answer
D. Condenser
83
Which ignition advance mechanism consist of pair of weight attached to distributor shaft?
Answer
A. Centrifugal advance system
84
Which of the following is the “Wrong statement” regarding distributor less ignition system?
Answer
D. Each ignition coil is a true step down transformer
A 15 064/2024
85
When did the maximum blow by gas flow happens through PCV valve?
Answer
C. Accelerating
86
Which reducing catalyst used in 3-way cat con for the conversion of NOx?
Answer
A. Rhodium
87
Which type of muffler use anti-noise to eliminate exhaust noise?
Answer
B. Electronic muffler
88
How particulates emission caused in CI engines?
Answer
A. Lack of turbulence and lack of oxygen
89
Which tool is used for gripping and turning pipes of varying diameters?
Answer
A. Stillson pipe wrench
90
In industry, the prohibition sign means?
Answer
B. Shows it must not be done
91
Which tool is used to tighten or loosen screws having internal hexagon sockets?
Answer
C. Allen key
92
What is the shape of “warning sign”?
Answer
C. Triangle shape sign
93
What is the function of ignition coil?
Answer
D. Step up low voltage to high voltage
94
EVAP canister outlet connected to :
Answer
B. Inlet manifold
95
What happens when the spark plug runs too cold?
Answer
B. High voltage surge will leak across sooty deposit formation
96
Which is the date of implementation of Bharat stage III vehicle?
Answer
B. 01.04.2010
97
Which type of magneto ignition system, the armature winding affected with centrifugal
stresses?
Answer
A. Rotating armature type
98
Which of the following statement is WRONG regarding Air injection system?
Answer
A. NOx in the exhaust completely removed.
99
Which of the following Ignition system trouble lead to engine overheating?
Answer
B. Too much ignition retard
100
What is the reason for rapid burning of CB points?
Answer
D. Too much primary current
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064/2024 18 A
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