Half
Same
Double
Four times
C. Double
Uniform throughout the mixture
Chemically correct mixture
About 35% of rich mixture
About 10% of rich mixture
Temperature
Volume
Density
None of these
All the irreversible engines have same efficiency
All the reversible engines have same efficiency
Both Rankine and Carnot cycles have same efficiency between same temperature limits
All reversible engines working between same temperature limits have same efficiency
Remain same
Decrease
Increase
None of these
Ignition coil
Spark plug
Carburettor
Fuel injector
The ratio of volumes of air in cylinder before compression stroke and after compression stroke
Volume displaced by piston per stroke and clearance volume in cylinder
Ratio of pressure after compression and before compression
Swept volume/cylinder volume
Opens at 15° after top dead centre and closes at 20° before bottom dead centre
Opens at 15° before top dead centre and closes at 20° after top dead centre
Opens at top dead centre and closes at bottom dead centre
May open and close anywhere
Cetane number
Octane number
Calorific value
All of these
Higher
Lower
Remain unaffected
None of the above
Not effect
Decrease
Increase
None of these
Jet area is automatically varied depending on the suction
The flow from the main jet is diverted to the compensating jet with increase in speed
The diameter of the jet is constant and the discharge coefficient is invariant
Flow is produced due to the static head in the float chamber
Retarding the spark
Increasing the engine speed
Both (A) and (B)
None of these
30° before top dead centre
30° after top dead centre
30° before bottom dead centre
30° after bottom dead centre
Napthene
Tetra ethyl lead
Amyl nitrate
Hexadecane
Morse test
Prony brake test
Motoring test
Heat balance test
Fuel pump
Injector
Carburettor
None of these
Scavenging
Turbulence
Supercharging
Pre-ignition
6 to 10
10 to 15
15 to 25
25 to 40
0.3 to 0.7 mm
0.2 to 0.8 mm
0.4 to 0.9 mm
0.6 to 1.0 mm
Equal to
Less than
Greater than
None of these
Mechanical efficiency
Overall efficiency
Volumetric efficiency
Relative efficiency
Hit and miss governing
Qualitative governing
Quantitative governing
Combination of (B) and (C)
Have no effect on
Increase
Decrease
None of these
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
Clearance volume
Volumetric efficiency
Ignition time
Effective compression ratio
Otto cycle
Diesel cycle
Dual combustion cycle
All of these
Low heat value of oil
High heat value of oil
Net calorific value of oil
Calorific value of fuel
Kerosene
Gasoline
Paraffin
Natural gas
Equally efficient
Less efficient
More efficient
None of these
Petrol, air and lubricating oil
Air and diesel
Petrol and lubricating oil
Petrol and air