Supercharger
Centrifugal pump
Natural aspirator
Movement of engine piston
D. Movement of engine piston
6 to 10
10 to 15
15 to 25
25 to 40
Increase
Reduce
Not effect
None of these
Same
More
Less
Less or more depending on operating conditions
Exhaust valve opens at 35° before bottom dead centre and closes at 20° after top dead centre
Exhaust valve opens at bottom dead centre and closes at top dead centre
Exhaust valve opens just after bottom dead centre and closes just before top dead centre
May open and close anywhere
Fuel used
Speed of engine
Compression ratio
None of these
Hit and miss governing
Qualitative governing
Quantitative governing
Combination of (B) and (C)
0
50
100
120
Diesel
Kerosene
Fuel oil
Gasoline
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
Speed
Temperature
Volume of cylinder
m.e.p. and I.H.P.
Maximum pressure developed
Minimum pressure
Instantaneous pressure at any instant
Average pressure
Chemically correct mixture
Lean mixture
Rich mixture for idling
Rich mixture for over loads
Opens at 20° before top dead center and closes at 35° after the bottom dead center
Opens at top dead center and closes at bottom dead center
Opens at 10° after top dead center and closes 20° before the bottom dead center
May open or close anywhere
Napthene
Tetra ethyl lead
Amyl nitrate
Hexadecane
Naturally aspirated
Supercharged
Centrifugal pump
Turbo charger
75% iso-octane and 25% normal heptane
75% normal heptane and 25% iso-octane
75% petrol and 25% diesel
75% diesel and 25% petrol
Cetane number
Octane number
Calorific value
All of these
10 bar
100 bar
150 bar
500 bar
1000 km/h
2000 km/h
2400 km/h
3000 km/h
To reduce mass of the engine per brake power
To reduce space occupied by the engine
To increase the power output of an engine when greater power is required
All of the above
Yes
No
To some extent
Unpredictable
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
Opens at top dead centre and closes at bottom dead centre
May open and close anywhere
180°
125°
235°
200°
Opens at 30° before bottom dead centre and closes at 10° after top dead centre
Opens at 30° after bottom dead centre and closes at 10° before top dead centre
Opens at bottom dead centre and closes at top dead centre
May open and close anywhere
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
Suction, compression, expansion and exhaust
Suction, expansion, compression and exhaust
Expansion, compression, suction and exhaust
Compression, expansion, suction and exhaust
Enhanced by decreasing compression ratio
Enhanced by increasing compression ratio
Dependent on other factors
None of the above
In the engine cylinder
At the crank shaft
At the crank pin
None of these
8 : 1
10 : 1
15 : 1
20 : 1 and less
Cylinder walls being too hot
Overheated spark plug points
Red hot carbon deposits on cylinder walls
Any one of these