The knocking C.I engines is characterised by the sudden auto-ignition of the mixture
A.at the end of the combustion process
B.in the middle of combustion process
C.at the very beginning of the combustion process
D.none of the above
Category: Automobile Engineering Mcqs
Theoretically air required for the combustion of one kg of fuel is
A.10 kg
B.14.5 kg
C.16.7 kg
D.17.4 kg
E.18.9 kg
Diesel fuel as compared to petrol is
A.More difficult to ignite
B.Less difficult to ignite
C.Equally difficult to ignite
D.None of the above
During discharge of a battery, the sulphuric acid in the electrolyte is replaced by
A.Lead sulphate
B.Oxygen
C.Hydrogen
D.Water
E.Ions
For the best utilization of fuel, in the engine cylinder, the air supply should be
A.About 10% surplus
B.About 25% surplus
C.Chemically correct
D.5 to 10 percent deficient
E.15 to 20 percent deficient
In a ball bearing which is more harder than the other parts?
A.Ball
B.Inner race
C.Outer race
D.All are equally hardened
E.It It depends on the size of bearing
The brake pipes in hydraulic brake systems are made of
A.Rubber
B.Polyvinylchloride
C.Plastic
D.Aluminium
E.Steel
The value overlap in case of four stroke petrol engine is approximately
A.30?
B.60?
C.90?
D.120?
If the cut-off is decreased, the efficiency of Diesel cycle
A.increases
B.decreases
C.is same
D.none of the above
By supercharging
A.Power stroke becomes stronger
B.Loss in exhaust is reduced
C.Engine can be made to run smoother
D.Thermal efficiency of the engine can be improved
