1. During the compression stroke of a four strock diesel engine, the poston compresses :
A) Air fuel mixture
B) Atomised diesel
C) Disel Vapour
D) Air
Ans:- D) Air
2.The inventor of two stroke engine is :
A) Dugald Clark
B) Rudolf disel
C) james Watt
D) Nicolaus A Otto
Ans:- A) Dugald Clark
3. Theoritically during expansion process in a four stroke engine :
A) Inlet Valve opens and exhaust value closes
B) Inlet Valve close and exhaust valve opens
C) Both valve remains closed
D) Both valve remains opened
Ans:- C) Both valve remains closed
4.The nominal volume of cylinder when piston is at TDC is called :
A) strcks volume
B) swept volume
C) clearence volume
D) Suction volume
Ans:- C) clearence volume
5.Which of the flowing engine can operate at higher speed?
A) square engine
B) over square engine
C) Under square engine
D) Steam engine
Ans:- B) over square engine
6. The Process of flushing out the products of cpmbustion from the engine cylinder by fresh
charge is known as.
A) Turbo chargine
B) Super charging
C) Scavenging
D) None of the above
Ans:- C) Scavenging
7.The injection pressure in CRDI system is upto :
A) 180 bar
B) 1080 bar
C) 18000 bar
D) 1800 bar
Ans: D) 1800 bar
8. When the piston of a two stroke. Single cylinder ergine move fron BDC to TDC?
A) transfer port open and intake port closes
B) exhaust port open and transfer port clses
C) exhaust port and transfer port opens
D) none of these
Ans:- D) none of these
9.The number of Crankshaft for opposed piston engine is:
A) one
B) two
C) three
D) four
Ans:- B) two
10. The retio of Brake thermal efficiency to indicated thermal efficiency is known as :
A) Machanical efficiency
B) Relative efficiency
C) Air standard efficiency
D) Calorific value efficiency
Ans:- A) Machanical efficiency
11. Chemically correct air fuel mixture ratio for SI engine is around :
A) 15:1
B) 9:1
C) 6:1
D) 12:1
Ans:- A) 15:1
12. In Otto cycle, the addition of heat takes place at:
A) Constant pressure
B) Constant volume
C) partially at constant pressure
D) Any of the above
Ans:- B) Constant volume
13. Which of the fllowing is true for a two stroke engine?
A) fuel efficiency is more than four stroke engine of same size
B) higher oil consumption
C) used for two wheelers only
D) eco friendly
Ans:- B) higher oil consumption
14. Which type of nozzle can be used for faciliating pilot injection before the main injection?
A) Single hole nozzle
B) Multi hole nozzle
C) Pintle nozzle
D) Pintaux nozzle
Ans:- D) Pintaux nozzle
15. At the ventury throat of the Carburettor the velocity of air is :
A) Maximum
B) Decreases
C) Increases
D) Remains same as before
Ans:- A) Maximum
16.The condition at which the engine operates at no load and with nearly closed throttle is
A) Dieseling
B) Cruising
C) Idling
D) None of the above
Ans:- C) Idling
17.The reference fuels uded for comparing the anti knock value of SI engine fuel is:
A) Benzene and tetraethyl lead
B) Iso octane and normal heptance
C) Normal cetane and alpha methyl naphathalene
D) Benzene and iso octane
Ans:- B) Iso octane and normal heptance
18. Releasing of clutch pedal causes :
A) load on release finger
B) the compression of pressure spring
C) Pressure plate move away from clutch dise
D) Pressure plate move twoards clutch dise
Ans:- D) Pressure plate move twoards clutch dise
19.Clutch shaft is also known as :
A) Transmission input shaft
B) Counter shaft
C) Lay shaft
D) Main shaft
Ans:- A) Transmission input shaft
20.Throw out bearing is used to :
A) reduce friction on clutch dise
B) engage the clutch
C) disengage the clutch
D) none of the above
Ans:- C) disengage the clutch
21. Excess clutch ftee pedal play causes :
A) Clutch slipping
B) Difficulty in gear shifting
C) Wear of release bearing
D) Wear of clutch dise
Ans:- B) Difficulty in gear shifting
22.Which of the following is not a function of final drive of beavy vehicle?
A) final speed reduction
B) power transmission
C) reduction of torque
D) none of the above
Ans:- C) reduction of torque
23.Which of the following is not an advantage of overdrive?
A) Fuel economy
B) Increase of torque
C) Reduced engine wear
D) High vehicle sp at low engine speed
Ans:-
24.The torque is measured in:
A) N-m
B) Nm/Second
C) N/m
D) N/m2
Ans:- A) N-m
25.The part of synchromesh gear box which is splined to the transmission output shaft is:
A) Synchroniser sleeve
B) Synchroniser ring
C) Mainshaft gear
D) synchroniser hub
Ans:- D) synchroniser hub
26. Idler gear is used to engage:
A) First gear
B) synchroniser ring
C) Reverse gear
D) Top gear
Ans:- C) Reverse gear
27.The tendancy of front wheel drive cars with unequel length of half shaft to pull to oneside during acceleration is known as:
A) Torque steer
B) Self steer
C) Power steer
D) None of the above
Ans:- A) Torque steer
28.Torsion bar is also known as
A) stabilizer rod
B) Anti roll bar
C) Trailing rod
D) Radius rod
Ans:- D) Radius rod
29. In macpherson type suspension system shock absorber is mounted on :
A) Lower which bone
B) upper whish bone
C) Struc
D) Spring
Ans:- C) Struc
30. Leaf springs are connected to frame through shackles for :
A) reduce friction
B) avoid breaking of spring
C) avoid rolling of vehicle
D) none of the above
Ans:- B) avoid breaking of spring
31.Torsion bar is attatched to :
A) Lower arm
B) Upper arm
C) Shock absorber
D) Steering knuckle
Ans:- A) Lower arm
32. Exhaust gas recirculation system is chiefly means to reduce the emission of :
A) CO
B) CO2
C) NOx
D) SO4
Ans:- C) NOx
33.Which of the following is not an effect of increased amount of axhaust gas recirculation?
A) engine brake power decreases
B) specific fuel consumption decreases
C) brake specific fuel consumption increases
D) none of the above
Ans:- B) specific fuel consumption decreases
34.The catalyst used for the reduction of NOx in three way catalytic converter is :
A) Platinum
B) Palladium
C) Rodium
D) All of the above
Ans:- C) Rodium
35.The speed of distributor cam is :
A) same as engine speed
B) half of engine speed
C) one fourth of camshaft speed
D) none of the above
Ans:- B) half of engine speed
36.The dwell angle for a four cylinder engine is in the range of
A) 48* to 52*
B) 55* to 70*
C) 36* to 42*
D) 10* to 32*
Ans:- A) 48* to 52*
37.The condensor in ignition system is mounted:
A) On ignition coil
B) On distributor cap
C) Outside the distributor
D) Inside the distributor
Ans:- D) Inside the distributor
38.The secondary terminal of Ignition coil is connected to :
A) Ameter
B) Distributor cap
C) Spark plug
D) Battery
Ans:- B) Distributor cap
39. which of the following unit is used to express the capacity of condensor?
A) tesla
B) webber
C) candela
D) micro farads
Ans:- D) micro farads
40. The specifc gravity of electrolyte can be checked with :
A) hygrometer
B) voltmeter
C) multimeter
D) hydrometer
Ans:- D) hydrometer
41.Open circuit voltage of a 12V lead acid battery in fully charged condition is :
A) 2 V
B) 12.6 V
C) 2.5 V
D) 14 V
Ans:- C) 2.5 V
42.The voltage of each cell of alkalinr bettery is :
A) 1.2 V
B) 2.2 V
C) 6.2 V
D) None of the above
Ans:- C) 6.2 V
43. The speed of generator at which its output voltage just rises above the voltage of battery being charged is called:
A) Cut in speed
B) Synchronous speed
C) Run off speed
D) Run out seed
Ans:- A) Cut in speed
44. The purpose of brushes in alternator of automobiles is:
A) To collect current from rotor winding
B) To collect current from stator winding
C) To convey current from battery to stator
D) To convey current from battery to rotor
Ans:- D) To convey current from battery to rotor
45. In an alternator current is induced in
A) Rotor winding
B) Stator winding
C) Carbon Brushes
D) Slip rings
Ans:- B) Stator winding
46.In starter motor the field coils are wound around :
A) Commutator
B) Pole shoes
C) Yoke
D) None of the above
Ans:- B) Pole shoes
47. the reflector used in automobilile head lamp is of
A) Spherical shape
B) Hemispherical shape
C) Hyperbolic shape
D) parabolic shape
Ans:- D) parabolic shape
48. the purpose of filling insert the bulb is:
A) to reduce filament temperature
B) to avoid dazzling effect
C) to avoid vapourisation of filament
D) none of the above
Ans:- C) to avoid vapourisation of filament
49.Metal halide type HID head lamps are popularly known as :
A) Mercury vapour lamp
B) Xenon lamp
C) Low pressure sodium lamp
D) high pressure sodium lamp
Ans:- B) Xenon lamp
50.Transler case is used in :
A) front wheel drive vehicles
B) rear wheel drive vehicles
C) four wheel drive vehicles
D) All of the above
Ans:- C) four wheel drive vehicles
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