Pre-ignition
Increase in detonation
Acceleration in the rate of combustion
Any one of these
D. Any one of these
Mechanical efficiency
Overall efficiency
Indicated thermal efficiency
Volumetric efficiency
30° before top dead centre
30° after top dead centre
30° before bottom dead centre
30° after bottom dead centre
Homogeneous
Heterogeneous
Both (A) and (B)
Laminar
Scavenging
Turbulence
Supercharging
Pre-ignition
180°
125°
235°
200°
Calorific value of oil
Low heat value of oil
High heat value of oil
Mean heat value of oil
Increase
Reduce
Not effect
None of these
Napthene
Tetra ethyl lead
Amyl nitrate
Hexadecane
Petrol, air and lubricating oil
Air and diesel
Petrol and lubricating oil
Petrol and air
A supercharger
A centrifugal blower
A vacuum chamber
An injection tube
Theoretical power
Actual power
Indicated power
None of these
0.001 second
0.002 second
0.003 second
0.004 second
Suction, compression, expansion and exhaust
Suction, expansion, compression and exhaust
Expansion, compression, suction and exhaust
Compression, expansion, suction and exhaust
Increase in the rate of heat transfer, there is a reduction in the power output and efficiency of the engine
Excessive turbulence which removes most of the insulating gas boundary layer from the cylinder walls
High intensity of knock causes crankshaft vibration and the engine runs rough
None of the above
Geometry of the reflector
Energy of neutrons
Properties of the reflector
All of these
6 to 10
10 to 15
15 to 25
25 to 40
Retarding the spark
Increasing the engine speed
Both (A) and (B)
None of these
Scavenging
Detonation
Supercharging
Polymerisation
Increase efficiency
Increase power
Reduce weight and bulk for a given output
Effect fuel economy
Not effect
Decrease
Increase
None of these
Haphazard motion of the gases in the chamber
Rotary motion of the gases in the chamber
Radial motion of the gases in the chamber
None of the above
Reducing the delay period
Raising the compression ratio
Increasing the inlet pressure of air
All of these
Fuel pump
Fuel injector
Governor
Carburettor
Hit and miss governing
Qualitative governing
Quantitative governing
Combination of (B) and (C)
Same
Less
More
None of these
Compression ratio for petrol engines varies from 6 to 10
Higher compression ratio in diesel engines results in higher pressures
Petrol engines work on Otto cycle
All of the above
Remain same
Decrease
Increase
None of these
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
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
Peak pressure
Rate of rise of pressure
Rate of rise of temperature
Peak temperature