15 %
30 %
50 %
70 %
B. 30 %
Half
Same
Double
Four times
Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame
Temperature at which it solidifies or congeals
It catches fire without external aid
Indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off
Clearance volume
Volumetric efficiency
Ignition time
Effective compression ratio
Cylinder walls being too hot
Overheated spark plug points
Red hot carbon deposits on cylinder walls
Any one of these
Same
More
Less
Less or more depending on operating conditions
Scavenging
Detonation
Supercharging
Polymerisation
Opens at 50° before bottom dead centre and closes at 15° after top dead centre
Opens at bottom dead centre and closes at top dead centre
Opens at 50° after bottom dead centre and closes at 15° before top dead centre
May open and close anywhere
10 bar
100 bar
150 bar
500 bar
1000 km/h
2000 km/h
2400 km/h
3000 km/h
Chemically correct air-fuel ratio by weight
Chemically correct air-fuel ratio by volume
Actual air-fuel ratio for maximum efficiency
None of the above
0.2 kg
0.25 kg
0.3 kg
0.35 kg
Suction, compression, expansion and exhaust
Suction, expansion, compression and exhaust
Expansion, compression, suction and exhaust
Compression, expansion, suction and exhaust
Plates
Pallets
Pins
All of these
Low heat value of oil
High heat value of oil
Net calorific value of oil
Calorific value of fuel
First a mild explosion followed by a bi explosion
First a big explosion followed by a mil explosion
Both mild and big explosions occurs simultaneously
Never occurs
Diesel engines
Gas turbines
Petrol engines
Aircraft engines
Short delay period
Late auto-ignition
Low compression ratio
High self ignition temperature of fuel
V₁/(V₀ + V₁)
V₀/(V₀ + V₁)
2V₀/(V₀ + V₁)
2V₁/(V₀ + V₁)
Enhance flow rate
Control air flow
Induce primary swirl
Induce secondary turbulence
Controlling valve opening/closing
Governing
Injection
Carburetion
Enhanced by decreasing compression ratio
Enhanced by increasing compression ratio
Dependent on other factors
None of the above
Equal to stroke volume
Equal to stroke volume and clearance volume
Less than stroke volume
More than stroke volume
Same
Less
More
More or less depending on power rating
Equal to
Below
Above
None of these
Iso-octane and alpha-methyl naphthalene
Normal octane and aniline
Isooctane and normal hexane
Normal heptane and isooctane
Kerosene
Gasoline
Paraffin
Natural gas
0.001 second
0.002 second
0.003 second
0.004 second
In the engine cylinder
At the crank shaft
At the crank pin
None of these
The ratio of volumes of air in cylinder before compression stroke and after compression stroke
Volume displaced by piston per stroke and clearance volume in cylinder
Ratio of pressure after compression and before compression
Swept volume/cylinder volume
Remain same
Decrease
Increase
None of these