Fuel pump
Injector
Carburettor
None of these
C. Carburettor
20 to 40
40 to 60
60 to 80
80 to 100
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
Controlling valve opening/closing
Governing
Injection
Carburetion
Controlling the air-fuel mixture
Controlling the ignition timing
Controlling the exhaust temperature
Reducing the compression ratio
Diesel engines
Gas turbines
Petrol engines
Aircraft engines
Exhaust will be smoky
Piston rings would stick into piston grooves
Engine starts overheating
Scavenging occurs
Is lighter
Requires smaller foundations
Consumes less lubricating oil
All of these
Same
Less
More
More or less depending on power rating
2 %
4 %
8 %
14 %
Peak pressure
Rate of rise of pressure
Rate of rise of temperature
Peak temperature
Maximum pressure developed
Minimum pressure
Instantaneous pressure at any instant
Average pressure
30 to 40 %
40 to 60 %
60 to 70 %
75 to 90 %
High heat value
Low heat value
Net calorific value
Calorific value
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
0.3 to 0.7 mm
0.2 to 0.8 mm
0.4 to 0.9 mm
0.6 to 1.0 mm
0.3 kg/hr
1 kg/hr
3 kg/hr
5 kg/hr
Air only
Diesel only
A mixture of diesel and air
None of these
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
Paraffin, aromatic, napthene
Paraffin, napthene, aromatic
Napthene, aromatics, paraffin
Napthene, paraffin, aromatic
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
Same
Lower
Higher
None of these
4-6 kg/cm² and 200-250°C
6-12 kg/cm² and 250-350°C
12-20 kg/cm² and 350-450°C
20-30 kg/cm² and 450-500°C
Calorific value of oil
Low heat value of oil
High heat value of oil
Mean heat value of oil
248 cm3
252 cm3
264 cm3
286 cm3
Same
Less
More
None of these
Higher maximum temperature
Qualitative governing
Quantitative governing
Hit and miss governing
Starts at 40° after bottom dead centre and ends at 10° before top dead centre
Starts at 40° before top dead centre and ends at 40° after top dead centre
Starts at top dead centre and ends at 40° before bottom dead centre
May start and end anywhere
Hit and miss governing
Qualitative governing
Quantitative governing
Combination of (B) and (C)
Below 50%
Between 50 and 85%
Between 85 and 95%
Between 95 and 100%
To distribute spark
To distribute power
To distribute current
To time the spark