Spark
Injected fuel
Heat resulting from compressing air that is supplied for combustion
Ignition
C. Heat resulting from compressing air that is supplied for combustion
6 to 10
10 to 15
15 to 25
25 to 40
9 : 1
12 : 1
15 : 1
18 : 1
Half
Same
Double
Four times
Fuel pump
Fuel injector
Spark plug
None of these
1500 rpm
750 rpm
3000 rpm
Any value independent of engine speed
20 to 40
40 to 60
60 to 80
80 to 100
Same as
Smaller than
Bigger than
None of these
Hit and miss governing
Qualitative governing
Quantitative governing
Combination of (B) and (C)
Inlet valve closing after bottom dead centre
Inlet valve closing before bottom dead centre
Inlet valve opening before top dead centre
Exhaust valve closing after top dead centre
Not run
Run more efficiently
Run at high speed
Explode
Net efficiency
Efficiency ratio
Relative efficiency
Overall efficiency
Fuel pump
Governor
Injector
Carburettor
Increase
Decrease
Be independent
May increase or decrease depending on other factors
High self ignition temperature
Low volatility
Higher viscosity
All of these
Decrease
Increase
Remain same
None of these
0.001 second
0.002 second
0.003 second
0.004 second
SEA 30
SAE 50
SAE 70
SAE 80
Equal to
Below
Above
None of these
30 to 40 %
40 to 60 %
60 to 70 %
75 to 90 %
15 %
30 %
50 %
70 %
Mechanical efficiency
Overall efficiency
Indicated thermal efficiency
Volumetric efficiency
Ignition coil
Spark plug
Carburettor
Fuel injector
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
Temperature at which it catches fire without external aid
Indicated by 90% distillation temperature, i.e. when 90% of sample oil has distilled off
Have no effect on
Increase
Decrease
None of these
Petrol, air and lubricating oil
Air and diesel
Petrol and lubricating oil
Petrol and air
Same
Less
More
More or less depending on power rating
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
15 %
30 %
50 %
70 %
The friction is high
The friction is unpredictable
The small difference in cooling water temperature or in internal friction has a disproportionate effect
The engine is rarely operated
Beginning of suction stroke
End of suction stroke
Beginning of exhaust stroke
End of exhaust stroke