Half
Same
Double
Four times
A. Half
Petrol engines
Diesel engines
Multi cylinder engines
All of these
Peak pressure
Rate of rise of pressure
Rate of rise of temperature
Peak temperature
Vaporisation
Carburetion
Ionisation
Atomisation
Equal to
Below
Above
None of these
Hit and miss governing
Qualitative governing
Quantitative governing
Combination of (B) and (C)
High heat value
Low heat value
Net calorific value
Calorific value
Benzene
Iso-octane
Normal heptane
Alcohol
To distribute spark
To distribute power
To distribute current
To time the spark
500-1000°C
1000-1500°C
1500-2000°C
2000-2500°C
A fine fuel spray mixed with air is ignited by the heat of compression which is at a high pressure
The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug
The fuel is first evaporated after passing through a carburettor and is mixed with air before ignition
All of the above
2-stroke petrol engine
4-stroke petrol engine
Diesel engine
Steam turbine
6 : 1
9 : 1
12 : 1
15 : 1
Opens at 20° before top dead center and closes at 35° after the bottom dead center
Opens at top dead center and closes at bottom dead center
Opens at 10° after top dead center and closes 20° before the bottom dead center
May open or close anywhere
To determine the information, which cannot be obtained by calculations
To conform the data used in design, the validity of which may be doubtful
To satisfy the customer regarding the performance of the engine
All of the above
Calorific value of oil
Low heat value of
High heat value of oil
Mean heat value of oil
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
Feeding more fuel
Heating incoming air
Scavenging
Supercharging
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
Supercharging reduces knocking in diesel engines
There can be limited supercharging in petrol engines because of detonation
Supercharging at high altitudes is essential
Supercharging results in fuel economy
6 kg/cm
12 kg/cm
20 kg/cm
35 kg/cm
Enhanced by decreasing compression ratio
Enhanced by increasing compression ratio
Dependent on other factors
None of the above
Chemically correct mixture
Lean mixture
Rich mixture for idling
Rich mixture for over loads
In the engine cylinder
At the crank shaft
At the crank pin
None of these
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
Calorific value of oil
Low heat value of oil
High heat value of oil
Mean heat value of oil
A supercharger
A centrifugal blower
A vacuum chamber
An injection tube
Increase
Reduce
Not effect
None of these
Requires smaller foundation
Is lighter
Consumes less lubricating oil
All of these
Up to 35%
Up to 50%
Up to 75%
Up to 100%
Reducing the delay period
Raising the compression ratio
Increasing the inlet pressure of air
All of these