The petrol engine works on
Otto cycle
Carnot cycle
Diesel cycle
Rankine cycle
Correct Answer :
A. Otto cycle
Related Questions
The advantage of the fuel injection system over the carburettor system is
Improved fuel efficiency
Improved emission
Improved power output
All of these
Free pedal play in car clutches is about
15 mm
25 mm
40mm
60 mm
Highest useful compression ratio (HUCR) is the highest compression ratio at which the
Engine can run
Engine gives maximum output
Engine is most efficient
Fuel can be used in a test engine without knocking
The temperature at which tyre inflation pressure should be checked is
20°C
25°C
35°C
Ambient temperature
In a Diesel engine, the function of a fuel injector is to
Mix the fuel and air
Ignite the air-fuel mixture
Provide flame front for ignition
Spray atomized fuel in the cylinder
In a ventilated disc brake
A duct directs air towards the caliper for cooling while the vehicle is moving
Caliper is covered with cooling fins
Disc contains many small holes for optimum cooling performance
Disc contains radial vanes between its rubbing surfaces for optimum cooling performance
In a four cylinder inline engine, the number of firing strokes in one revolution of the crank is
1
2
3
4
The main merit of a multi cylinder type cylinder sleeve is
Smaller engine dimensions
Better cooling efficiency
High rigidity
None of these
Which of the following indicates multigrade oil?
SAE 30
API SF
SAE 20 W50
API 50
The calorific value of petrol is about
36.5-38.5 MJ/kg
39.4-42.5 MJ/kg
42.7-43.5 MJ/kg
45.5-47 MJ/kg
The crescent shaped cavity on the piston head top surface is called as
Piston oil hole
Snap ring
Valve recess
Valve clearance
The basic purpose of a four wheel drive (4WD) system is that it
Delivers improved cornering on dry road surfaces
Eliminates the need of snow tyres, tyre chains, etc.
Ensures effective transmission of engine torque to all four wheels, even on slippery road surfaces
Ensures that effective braking can be performed, even on slippery surfaces
The main function of a master cylinder is to
Adjust the extent of brake pedal free play
Boost the force applied to brake pedal
Convert brake pedal force into hydraulic pressure
Ensure that all the wheel brakes are supplied with the same amount of fluid pressure
The basic characteristics of a brake fluid is
A high boiling point
Low viscosity
Compatibility with rubber and metal parts
All of these
The firing order for an inline four cylinder I.C. engine is
1-2-3-4
1-3-4-2
1-2-4-3
1-3-2-4
The crankcase dilution means
Dilution of fuel in the crankcase
Dilution of oil by water in the crankcase
Dilution of lubrication oil by fuel in the crankcase
Dilution of mixture passing through crankcase in two stroke engines
A maintenance free battery
Has lead-antimony plate grid
Has lead-calcium plate grid
Does not contain acid
Does not contain water
Clutch facings are usually attached to the plate by
Steel rivets
Brass rivets
Aluminium screws
Steel screws
The sequence order of events in a four stroke engine is
Suction exhaust power compression
Suction power compression exhaust
Suction compression power exhaust
Exhaust compression power suction
The aluminium alloy is used in cylinder blocks because
It is lighter and has good heat dissipation characteristics
Material cost is low
It does not require any cylinder liners
The piston is also made of aluminium alloy
The sequence in which the force is transmitted through a brake system when the brake pedal is depressed is
Brake pedal, master cylinder, brake lines, vacuum servo mechanism, brake pads
Brake pedal, vacuum servo mechanism, master cylinder, brake lines, brake pads
Brake pedal, master cylinder, vacuum servo mechanism, brake lines, brake pads
Brake pedal, brake lines, vacuum servo mechanism, master cylinder, brake pads
Which of the following is not a part of the chassis?
Wheels
Front axle
Steering system
Seats
The brake pedal during ABS operation
Is pushed upward forcefully
Pedal stroke becomes longer
Transmits slight kickback to the driver's foot
All of the above
The crankshaft of a typical inline four cylinder engine has ________ balance weights.
12
4
16
8
If the spark plug deposit indicates black coating of soot, it indicates that the engine has been generally operating on
Too lean mixture
Stoichiometric mixture
Most economical mixture
Too rich mixture
The octane rating of petrol commercially available is
85-95
95-100
100-110
110-125
The timing belt is attached to the camshaft pulley and
Timing belt drive pulley
Distributor
Radiator fan pulley
Alternator pulley
The valve tappet clearance is measured by
Screw pitch gauge
Engineering scale
Feeler gauge
Vernier caliper
The starting system includes
A battery, a starter, and an ignition switch
A battery, a distributor, and an ignition switch
A battery, a starter, and a distributor
A distributor, a starter, and an ignition switch
For the same maximum pressure and temperature
Diesel cycle is more efficient than Otto cycle
Otto cycle is more efficient than Diesel cycle
Both Otto cycle and Diesel cycle are equally efficient
None of the above