| Post Name | Mechanic Police Constable - Police (Motor Transport Wing) |
|---|---|
| Question Paper Code | 036/2024 |
| Category Code | 128/2023 |
| Date of Test | 8 April 2024 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Which of the following statement is/are correct about Internal Combustion engines?
(i) High speed engine
(ii) No cooling of the cylinders required.
(iii) Cooling arrangement necessary.
(iv) Slow speed engine.
Answer
D. Only (i) and (iii)
2
Volume of the space above the piston when it is at TDC is known as :
Answer
A. Clearance volume
3
Which of the following statement is/are correct about Four stroke engines?
(i) It gives one power stroke for one revolution of the crankshaft.
(ii) Engine is heavier in weight than two stroke due to more parts.
(iii) It gives one power stroke in two revolutions of the crankshaft.
(iv) Engine is lighter in weight than two stroke due to less parts.
Answer
D. Only (ii) and (iii)
4
The ratio between the air drawn in the cylinder during the suction stroke and the volume of
the cylinder is known as :
Answer
B. Volumetric efficiency
5
Which of the following statement is correct about Compression ratio?
Answer
C. Ratio of compression volumes before the stroke and after
6
Which among the following is power available in the engine flywheel?
Answer
D. Brake Horse power
7
What is the stroke length of an engine if the crankshaft throw is 55 mm?
Answer
C. 110 mm
8
An instrument that indicate distance travelled by a vehicle?
Answer
A. Odometer
9
Which indicator is used to display the accelerator opening level to maintain the set speed?
Answer
B. Cruise control indicator
10
Which among the following is the non-electric type fuel gauge?
Answer
Question Cancelled
11
Where is the pre-combustion chamber located?
Answer
A. Cylinder head
12
Which type of pistons is used in modern engines to increase the area of contact at thrust
faces?
Answer
C. Slipper piston
13
Which of the following statement is correct about roller bearings?
Answer
B. It can take both axial and radial load
14
Which type of drive is used when the crankshaft and the camshaft are very close to each
other?
Answer
C. Gear drive
15
Which type of oil scraper rings is used specially for re-ringing jobs, where the cylinder has
worn out excessively?
Answer
D. Dura flex rings
16
Which component prevents arcs at the CB points and helps the ignition coil to release its
energy in the form of high voltage surge through the secondary winding?
Answer
C. Condenser
17
When a steel shutter is placed or moved in the air gap between the two poles of a magnet the
magnetism in the air gap is cutoff. The sensor which used this principle is called?
Answer
A. Hall effect sensor
18
In which type of ignition system two spark plugs are ignited at the same time?
Answer
A. Distributor less ignition system
19
Which component in distributor connects and disconnects primary circuit of the ignition coil?
Answer
A. CB points
20
In which way a Condenser is connected to CB points?
Answer
B. Parallel
21
Which type nozzle having an auxiliary spray hole with main hole?
Answer
C. Pintaux nozzle
22
The measurement of fuel delivered by each plunger with the control rod in a fixed position
and its comparison is called :
Answer
B. Calibration
23
How much maximum pressure, develops by high pressure diesel pump in CRDI engine?
Answer
A. 2000 Kg/cm2
24
In a diesel engine the duration between the time of injection and time of ignition is called :
Answer
C. Delay period
25
How many fuel chambers are in HEUI?
Answer
A. One
26
Which sensor is used to monitor the amount of oxygen in the exhaust gas?
Answer
D. Lambda Sensor
27
How the CRDI injector’s pressure control valve operated?
Answer
B. Electronically
28
Which type of pump ensures in built and uniform delivery to all injectors in diesel engine?
Answer
C. Rotary pump
29
What is the expansion of HEUI?
Answer
B. Hydraulically actuated electronically controlled unit injector
30
In CRDI engine fuel system, where the excessive fuel returns?
Answer
C. Return to the fuel tank
31
What is the purpose of glow plug in pre-combustion chamber in diesel engine?
Answer
D. Initiating combustion
32
How much time taken to give signals to ECM after ignition switch on?
Answer
B. Two second
33
Where is the thermostat valve fitted in pressurized cooling system?
Answer
D. Water outlet of cylinder head
34
Which of the following is NOT an example of anti freeze agent used in engine coolant?
Answer
Question Cancelled
35
In which type of engine, Keel cooling system is generally used?
Answer
D. Marine engines
36
Which of the following is a commonly used corrosion inhibitor in engine coolant?
Answer
B. Chromates
37
While engine working, the oil warning light provided on the dash board comes on, it means :
Answer
C. Low oil pressure
38
The minimum temperature at which oil gives off sufficient vapour to form combustible
mixture with air is known as :
Answer
A. Flash point
39
Which type of lubrication system used a scavenge pump?
Answer
D. Dry sump lubrication
40
Which of the following chemical substance are added to lubricating oil as anti-forming
additives?
Answer
C. Polyorganosiloxanes
41
Which of the following statement is correct about maintenance-free battery?
(i) 0.1% calcium used
(ii) less corrosion of battery cables and terminals
(iii) the percentage of antimony is usually up to 5
Answer
B. Only (i) and (ii)
42
What are the causes for battery sulphation?
(i) battery kept in discharged condition
(ii) very high specific gravity of electrolyte
(iii) insufficient electrolyte in the battery
Answer
C. All of the above
43
Which of the following statement is correct about battery?
(i) as the gravity increases, the freezing point is lowered
(ii) specific gravity of fully charged battery above 32°C is 1.230
(iii) specific gravity of electrolyte is increased during charging
Answer
C. All of the above
44
Which of the following statement is correct about alternator?
(i) stator is a stationary part
(ii) current is generated in the stator windings
(iii) magnetic field produced in rotor
Answer
C. All of the above
45
Which of the following statement is correct about alternator output voltage?
(i) speed of rotation of the rotor
(ii) number of turns in the stator windings
(iii) strength of the rotor magnetic field
Answer
D. All of the above
036/2024 8 A
46
Which of the following statement is correct about DC dynamo?
(i) Armature coils are lap winding
(ii) Armature coils are wave winding
(iii) Armature coils are shunt winding
Answer
B. Only (i) and (ii)
47
Which of the following statement is correct about Dyer drive starting motor?
(i) It is a pre engaged type starter motor
(ii) It is a inertia drive starter motor
(iii) It is suitable for heavy duty engines
Answer
D. Only (i) and (iii)
48
Which of the following statement is correct about Integrated Starter Generator (ISG)?
(i) To perform the functions of both an alternator and a starter motor.
(ii) To provide an automatic vehicle start - stop system.
(iii) It transfers the drive from the engine to the transmission.
Answer
C. All of the above
49
Which of the following statement is correct about starting motor?
(i) In starting motor; series-shunt winding used
(ii) In series-shunt winding lower internal resistance
(iii) In series -shunt winding current consumption is low
Answer
B. Only (i) and (ii)
50
Which of the following statement is correct about headlight reflector?
(i) If the bulb is placed at its focus, the reflected rays are parallel to the axis
(ii) If the bulb is placed between focus and reflector, the reflected beam will diverge
(iii) If the bulb placed in front of the focal point, the reflected beam will coverage
Answer
C. All of the above
51
Which of the following statement is correct about HID lamps?
(i) HID lights do not have any filament
(ii) It is also called as Xenon lights
(iii) Larger in size
Answer
B. Only (i) and (ii)
52
Which of the following statement is correct about air bag?
(i) air bag is made of nylon fabric.
(ii) air bag unit contain sodium oxide and potassium nitrate.
(iii) produces nitrogen gas.
Answer
D. Only (i) and (iii)
53
What are the reasons for acting vertical loads on the chassis frame?
(i) Weight of the vehicle
(ii) Weight of the passengers
(iii) When the vehicles comes across the bumb
Answer
D. All of the above
54
The side member, cross members and the sub sections are joined by :
(i) Riveting
(ii) Lap welding
(iii) Bolted joint
Answer
B. Only (i) and (ii)
55
Which of the following statement is correct about leaf Spring eye bush material?
(i) phosphor bronze bushes
(ii) rubber bushes
(iii) copper bushes
Answer
B. Only (i) and (ii)
56
Which of the following statement is correct about wishbone type suspension system, the coil
spring is placed in?
(i) Lower wishbone
(ii) Upper wishbone
(iii) Under side of the cross member
Answer
C. Only (i) and (iii)
57
Which of the following statement is correct about coil spring, coil spring take?
(i) Shear stress
(ii) Torque reaction
(iii) Bending stress
Answer
D. Only (i) and (iii)
58
Which of the following statement is correct about independent suspension system?
(i) unsprung weight is reduced
(ii) gyroscopic action is reduced
(iii) low initial cost
Answer
B. Only (i) and (ii)
59
What are the main advantages of lower aspect ratio?
(i) Better load carrying capacity
(ii) Comfortable ride
(iii) Less wear
Answer
D. Only (i) and (iii)
60
What are the effects of over inflation in tyre?
(i) rapid wear of tyre tread in centre only
(ii) tread separation and ply separation
(iii) more tread wear on sides
Answer
B. Only (i) and (ii)
61
Which of the following statement is/are depends upon the torque transmission of clutch?
Answer
D. All of the above
62
What is the need of damper spring in the clutch plate?
Answer
C. Dampen shocks during clutch operation
63
Which of the following component is the part of single plate clutch assembly?
Answer
A. Pressure plate
64
Which of the following statement is/are correct about synchromesh gear box?
(i) Synchronisers are used for easy gear shifting when a vehicle is motion
(ii) With synchronising action, gears can be changed without using double declutching
(iii) With synchronising action, gears can be changed with using double declutching
Answer
B. Only (i) and (ii)
65
Which of the following statement is/are the correct reasons for the gear to slip in a gear
shifting mechanism?
(i) Wrong adjustment of gear lever/ selector road
(ii) Weak lock spring
(iii) Worn out locking ball/pin
Answer
D. All of the above (i) (ii) and (iii)
036/2024 12 A
66
Which of the following statement is/are correct about constant mesh gear box?
(i) Gears of the main shaft are always in mesh with the corresponding gears of the counter
shaft.
(ii) The main shaft gears are slided on the main shaft with the help of the shifter yoke
mechanism.
(iii) In between the splined main shaft and gears, bushes are provided.
Answer
A. Only (i) and (iii)
67
Which of the following causes is/are correct in case of gear clash during shifting?
(i) Worn out universal joint
(ii) Synchroniser defective
(iii) Clutch free pedal play too much
Answer
C. Only (ii) and (iii)
68
Which of the following is/are the advantage of automatic transmission?
Answer
D. All of the above
69
AMT vehicle stands for :
Answer
C. Automated Manual Transmission
70
Which of the following is/are the different types of CVT?
(i) Multiple chain with gear drive
(ii) Toothed belt drive
(iii) Steel belt drive step pulley
Answer
D. All of the above (i) (ii) and (iii)
A 13 036/2024
71
Which one of the following is the spring loaded plate that transmits power to the driven plate
when the clutch is engaged?
Answer
A. Pressure plate
72
It is a device which is used to transfer power from the engine to the transmission input shaft,
it act as an automatic clutch to engage and disengage the engine and the transmission :
Answer
C. Torque converter
73
Which one of the following is a part of cross-type universal joint?
Answer
B. Yokes
74
What is the need of universal joint in a propeller shaft?
Answer
B. To transfer torque at an angle
75
In a front wheel drive vehicles Transmission (Gear box) and final drive
Answer
C. Transaxle
76
Which of the following statement is/are correct about a fully floating axle?
(i) Takes only the driving thrust
(ii) Takes the vehicle load as well as the driving thrust
(iii) Takes only a partial load of the vehicle but the full driving thrust
Answer
A. Only (i)
77
Which of the following statement is/are correct in case of torque tube drive?
(i) The springs takes the weight of the body, torque reaction and driving thrust
(ii) The springs takes only side thrust besides supporting the body weight
(iii) The springs takes the weight of the body and driving thrust
Answer
B. Only (ii)
78
The adjustment for backlash in a differential is provided between the :
Answer
A. Crown wheel and drive pinion
79
Which of the following statement is/are correct about functions of final drive?
(i) It decrease the torque by increasing the speed
(ii) It transmit power at a right angle
(iii) It increase the torque by reducing the speed
Answer
B. Only (ii) and (iii)
80
Which part of the differential is connected with the inner end of the axle shaft in a rear wheel
drive vehicle?
Answer
D. Sun gear
A 15 036/2024
81
What causes “Air Suction” in pump of hydraulic power steering system?
Answer
A. Noise
82
What is the main cause for wear on one side of tyre?
Answer
C. Improper camber
83
Which angle helps in self centering of wheels after negotiating a turn?
Answer
A. King pin inclination
84
The angle formed by the wheel with the vertical when the top of the wheel slants outward is
called :
Answer
C. Positive camber
85
Technician A says at low speed four-wheel steering causes the rear wheels to pivot in the
same direction as the front wheels. Technician B says at high speed the rear wheels pivot in
the opposite direction of the front wheels. Who is right?
Answer
Question Cancelled
86
The Electronic Power Steering (EPS) system control unit control the assist motor based on
signals of :
Answer
D. road resistance, steering turning speed and direction and vehicle speed
036/2024 16 A
87
One purpose of a recirculating ball type steering gear is to reduce the :
Answer
B. operating friction
88
Too much toe-in will be noticed by :
Answer
Question Cancelled
89
Which is the heart of integral power steering system?
Answer
C. Rotary control valve
90
What will be the effect of negative scrub radious?
Answer
D. Wheel is caused to toe - in
91
The efficiency of hydraulic braking system is :
Answer
Question Cancelled
92
Disc brakes self-adjust when the lining wear allows the piston to :
Answer
B. Slide outward through the seal
93
The fading of brakes occur :
Answer
D. during continuous brake application
A 17 036/2024
94
In vacuum booster servo assisted brakes, the brakes are applied when :
Answer
B. atmospheric pressure is applied to one side of the vacuum piston
95
Which principle is applicable for hydraulic brakes?
Answer
A. Pascals law
96
What is the precautionary measures to be adapted while removing secondary piston from a
master cylinder to prevent damage?
Answer
C. Remove the stopper bolt before
97
Releasing and reapplying the brakes succession is what an antilock system does and this
process is called :
Answer
B. Pressure modulation
98
Which type of brake system save the vehicle from skidding?
Answer
A. ABS Brakes
99
In a master cylinder, the primary piston is the piston that is :
Answer
C. directly operated by the push rod from brake pedal
100
What is the function of traction control system?
Answer
B. Prevent wheel spinning
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