Same
More
Less
Less or more depending on operating conditions
B. More
Prevent sparking across the gap between the points
Cause more rapid break of the primary current, giving a higher voltage in the secondary circuit
Both (A) and (B)
None of the above
Equal to
Less than
Greater than
None of these
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
Ignition coil
Spark plug
Carburettor
Fuel injector
10 bar
100 bar
150 bar
500 bar
ηm = B.P/I.P
ηm = I.P/B.P
ηm = (B.P × I.P)/100
None of these
More
Less
Same
More/less depending on capacity of engine
Higher heating value
Higher flash point
Lower volatility
Longer ignition delay
14.6 : 1
18.5 : 1
20.4 : 1
22.6 : 1
6 : 1
9 : 1
12 : 1
15 : 1
Temperature and pressure in the cylinder at the time of injection
Nature of the fuel mixture strength
Relative velocity between the fuel injection and air turbulence pressure of residual gases
All of the above
A supercharger
A centrifugal blower
A vacuum chamber
An injection tube
Not effected
Decrease
Increase
None of these
Naturally aspirated
Supercharged
Centrifugal pump
Turbo charger
Air used for combustion sent under pressure
Forced air for cooling cylinder
Burnt air containing products of combustion
Air used for forcing burnt gases out of engine's cylinder during the exhaust period
Increase efficiency
Increase power
Reduce weight and bulk for a given output
Effect fuel economy
Kerosene
Gasoline
Paraffin
Natural gas
Piston ring and cylinder wear
Formation of hard coating on piston skirts
Oil sludge in the engine crank case
Detonation
Increase maximum pressure and maximum temperature
Reduce maximum pressure and maximum temperature
Increase maximum pressure and decrease maximum temperature
Decrease maximum pressure and increase maximum temperature
Highly ignitable
More difficult to ignite
Less difficult to ignite
None of these
1 m3
5 m3
56 m3
910 m3
6 to 10
10 to 15
15 to 25
25 to 40
Equal to
Below
Above
None of these
Clearance volume
Volumetric efficiency
Ignition time
Effective compression ratio
Calorific value of oil
Low heat value of
High heat value of oil
Mean heat value of oil
Napthene
Tetra ethyl lead
Amyl nitrate
Hexadecane
Single cylinder petrol engine
Four stroke engine
Single cylinder diesel engine
Multi cylinder engine
0
50
100
120
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