Increase
Reduce
Not effect
None of these
A. Increase
Equal to
One-half
Twice
Four-times
Detonation
Turbulence
Pre-ignition
Supercharging
6 kg/cm
12 kg/cm
20 kg/cm
35 kg/cm
Cetane number
Octane number
Calorific value
None of these
Decreasing the density of intake air
Increasing the temperature of intake air
Increasing the pressure of intake air
Decreasing the pressure of intake air
Geometry of the reflector
Energy of neutrons
Properties of the reflector
All of these
Carburettor
Injector
Governor
None of these
Hit and miss governing
Qualitative governing
Quantitative governing
Combination of (B) and (C)
Otto cycle
Diesel cycle
Dual cycle
Carnot cycle
Air only
Petrol only
A mixture of petrol and air
None of these
5-10 kg/cm²
20-25 kg/cm²
60-80 kg/cm²
90-130 kg/cm²
More
Less
Same
More/less depending on capacity of engine
Diesel
Kerosene
Fuel oil
Gasoline
Retarding the spark
Increasing the engine speed
Both (A) and (B)
None of these
Requires smaller foundation
Is lighter
Consumes less lubricating oil
All of these
9 : 1
12 : 1
15 : 1
18 : 1
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
0.001 second
0.002 second
0.003 second
0.004 second
Equal to
Less than
Greater than
None of these
Fuel injection starts at 10° before to dead center and ends at 20° after tor dead center
Fuel injection starts at top dead center and ends at 20° after top dead center
Fuel injection starts at just before top dead center and ends just after top dead center
May start and end anywhere
180°
125°
235°
200°
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
10 bar
20 bar
25 bar
35 bar
Speed
Temperature
Volume of cylinder
m.e.p. and I.H.P.
2-stroke engine can run in any direction
In 4-stroke engine, a power stroke is obtained in 4-strokes
Thermal efficiency of 4-stroke engine is more due to positive scavenging
Petrol engines occupy more space than diesel engines for same power output
Single cylinder petrol engine
Four stroke engine
Single cylinder diesel engine
Multi cylinder engine
25 %
50 %
70 %
100 %
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
Four stroke C.I. engine, four stroke S.I. engine, two stroke S.I. engine
Four stroke S.I. engine, four stroke C.I. engine, two stroke S.I. engine
Four stroke C.I. engine, two stroke S.I. engine, four stroke S.I. engine
Two stroke S.I. engine, four stroke S.I. engine, four stroke C.I. engine
Plates
Pallets
Pins
All of these