Q.1
The knocking tendency in spark ignition engines may be decreased by
Q.2
The knocking in diesel engines may be prevented by
Q.3
The sensing element in the control system of nuclear reactors measures the _________ of the neutron flux in the reactor.
Q.4
In diesel engine, the compression ratio in comparison to expansion ratio is
Q.5
A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of
Q.6
A fuel of cetane number 40 has the same ignition quality as a mixture of
Q.7
The term scavenging is generally associated with
Q.8
Crankcase explosion in I.C. engines usually occurs as
Q.9
The thermal efficiency of a diesel cycle having fixed compression ratio, with increase in cut-off ratio will
Q.10
Which is more viscous lube oil?
Q.11
The reflectivity depends upon
Q.12
Which of the following fuel has little tendency towards detonation?
Q.13
By higher octane number of spark ignition fuel, it is meant that the fuel has
Q.14
In a four stroke cycle diesel engine, the exhaust valve
Q.15
A petrol engine, during suction stroke draws
Q.16
In a diesel engine, the duration between the time of injection and ignition, is known as
Q.17
The thermal efficiency of a petrol engine is _________ as compared to diesel engine.
Q.18
The mean effective pressure obtained from engine indicator indicates the
Q.19
The accumulation of carbon in a cylinder results in increase of
Q.20
If V₁ is the jet velocity and V₀ is the vehicle velocity, then propulsive efficiency of a turbojet engine is
Q.21
Which of the following is false statement?
Excess quantities of sulphur in diesel fuel are Objectionable because it may cause the following
Q.22
The basic requirement of a good combustion chamber is
Q.23
In a petrol engine, the mixture has the lowest pressure at the
Q.24
In case of gas turbines, the gaseous fuel consumption guarantees are based on
Q.25
Gaseous fuel guarantees are based on
Q.26
The maximum temperature in the I.C. engine cylinder is of the order of
Q.27
For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of
Q.28
The rating of a diesel engine, with increase in air inlet temperature, will
Q.29
If one cylinder of a diesel engine receives more fuel than the others, then for that cylinder the
Q.30
The theoretically correct air fuel ratio for petrol engine is of the order of
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