Compression starts at 35° after bottom dead center and ends at top dead center
Compression starts at bottom dead center and ends at top dead center
Compression starts at 10° before bottom dead center and, ends just before top dead center
May start and end anywhere
A. Compression starts at 35° after bottom dead center and ends at top dead center
Uniform throughout the mixture
Chemically correct mixture
About 35% of rich mixture
About 10% of rich mixture
Carburettor
Injector
Governor
None of these
Temperature
Volume
Density
None of these
Scavenging
Detonation
Supercharging
Polymerisation
10 : 1
15 : 1
20 : 1
25 : 1
Fuel injection starts at 10° before to dead center and ends at 20° after tor dead center
Fuel injection starts at top dead center and ends at 20° after top dead center
Fuel injection starts at just before top dead center and ends just after top dead center
May start and end anywhere
0
50
100
120
Maximum pressure developed
Minimum pressure
Instantaneous pressure at any instant
Average pressure
Same
Lower
Higher
None of these
Supercharging
Carburetion
Turbulence
Delay period
Is lighter
Requires smaller foundations
Consumes less lubricating oil
All of these
Benzene
Iso-octane
Normal heptane
Alcohol
Up to 35%
Up to 50%
Up to 75%
Up to 100%
Starts at top dead centre and ends at bottom dead centre
Starts at 30° before top dead centre and ends at 50° before bottom dead centre
Starts at 30° after top dead centre and ends at 50° after bottom dead centre
May start and end anywhere
1 - rγ - 1
1 + rγ - 1
1 - (1/rγ - 1)
None of these
Air only
Diesel only
A mixture of diesel and air
None of these
Thermal efficiency of diesel engine is about 34%
Theoretically correct mixture of air and petrol is approximately 15:1
High speed compression engines operate on dual combustion cycle
S.I. engines are quality governed engines
Opens at top dead centre and closes at bottom dead centre
Opens at 20° before top dead centre and closes at 40° after bottom dead centre
Opens at 20° after top dead centre and closes at 20° before bottom dead centre
May open or close anywhere
Supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere
Providing forced cooling air
Injecting excess fuel for raising more loads
Supplying compressed air to remove combustion products fully
Increase
Decrease
Remain same
Increase up to certain limit and then decrease
Below 50%
Between 50 and 85%
Between 85 and 95%
Between 95 and 100%
Equal to
Less than
Greater than
None of these
Not effect
Decrease
Increase
None of these
Fuel pump
Governor
Injector
Carburettor
Fuel pump
Injector
Carburettor
None of these
Clearance volume
Volumetric efficiency
Ignition time
Effective compression ratio
Exhaust will be smoky
Piston rings would stick into piston grooves
Engine starts overheating
Scavenging occurs
Mechanical efficiency
Overall efficiency
Volumetric efficiency
Relative efficiency
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
Starts at 40° after bottom dead centre and ends at 30° before top dead centre
Starts at 40° before bottom dead centre and ends at 30° after bottom dead centre
Starts at bottom dead centre and ends at top dead centre
May start and end anywhere