Is lighter
Requires smaller foundations
Consumes less lubricating oil
All of these
D. All of these
Air only
Diesel only
A mixture of diesel and air
None of these
Not effect
Decrease
Increase
None of these
Retarding the spark
Increasing the engine speed
Both (A) and (B)
None of these
14.6 : 1
18.5 : 1
20.4 : 1
22.6 : 1
Yes
No
To some extent
Unpredictable
Suction, compression, expansion and exhaust
Suction, expansion, compression and exhaust
Expansion, compression, suction and exhaust
Compression, expansion, suction and exhaust
Otto cycle is more efficient than the Diesel
Diesel cycle is more efficient than Otto
Both Otto and Diesel cycles are, equally efficient
Compression ratio has nothing to do with efficiency
30 kW four-stroke petrol engine running at 1500 r.p.m.
30 kW two-stroke petrol engine running at 1500 r.p.m.
30 kW two-stroke diesel engine running at 750 r.p.m.
30 kW four-stroke diesel engine running at 750 r.p.m.
0.15 kg
0.2 kg
0.25 kg
0.3 kg
Feeding more fuel
Heating incoming air
Scavenging
Supercharging
Low heat value of oil
High heat value of oil
Net calorific value of oil
Calorific value of fuel
V₁/(V₀ + V₁)
V₀/(V₀ + V₁)
2V₀/(V₀ + V₁)
2V₁/(V₀ + V₁)
25 %
50 %
70 %
100 %
1000 km/h
2000 km/h
2400 km/h
3000 km/h
2-stroke cycle engines
4-stroke cycle engines
Aeroplane engines
High efficiency engines
Benzene
Iso-octane
Normal heptane
Alcohol
Mechanical efficiency
Overall efficiency
Indicated thermal efficiency
Volumetric efficiency
Above the piston
Below the piston
Between the pistons
There is no such criterion
Fuel pump
Fuel injector
Governor
Carburettor
Supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere
Providing forced cooling air
Injecting excess fuel for raising more loads
Supplying compressed air to remove combustion products fully
Otto cycle
Diesel cycle
Dual cycle
Carnot cycle
Half
Same
Double
Four times
Calorific value of oil
Low heat value of oil
High heat value of oil
Mean heat value of oil
Air alone
Air and fuel
Air and lub oil
Fuel alone
It is a standard fuel used for knock rating of diesel engines
Its chemical name is normal hexadecane
It has long carbon chain structure
All of the above
Increase
Decrease
Be independent
May increase or decrease depending on other factors
Short delay period
Late auto-ignition
Low compression ratio
High self ignition temperature of fuel
Beginning of suction stroke
End of suction stroke
End of compression stroke
None of these
Inject fuel in a chamber of high pressure at the end of compression stroke
Inject fuel at a high velocity to facilitate atomisation
Ensure that penetration is not high
All of the above
Increase
Reduce
Not effect
None of these