Q.1
In petrol engines, advancing of the spark timing will _________ the knocking tendency.
Q.2
In petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will _________ the knocking tendency.
Q.3
The working pressure and temperature inside the cylinder of an internal combustion engine is _________ as compared to a steam engine.
Q.4
If V₁ is the jet velocity and V₀ is the vehicle velocity, then the propulsive efficiency of a rocket is given by
Q.5
Thermal efficiency of a two stroke cycle engine is _________ a four stroke cycle engine.
Q.6
Most high speed compression engines operate on
Q.7
High speed compression engines operate on
Q.8
The increase of cooling water temperature in petrol engine will _________ the knocking tendency.
Q.9
Theoretically, a four stroke cycle engine should develop _________ power as that of a two stroke cycle engine.
Q.10
The combustion in compression ignition engines is
Q.11
Combustion in compression ignition engines is
Q.12
Antiknock for compression ignition engines is
Q.13
A diesel engine is _________ as compared to petrol engine, both running at rated load.
Q.14
Which of the following statement is correct regarding normal cetane?
Q.15
The mechanical efficiency (ηm) of the engine is given by
Q.16
The loud pulsating noise heard within the cylinder of an internal combustion engine is known as
Q.17
The power actually developed by the engine cylinder of an I.C. engine is known as
Q.18
Air fuel ratio at which a petrol engine cannot work is
Q.19
In a four stroke cycle petrol engine, the expansion
Q.20
The volumetric efficiency of a well designed engine may be
Q.21
Compression loss in I.C engines occurs due to
Q.22
The reference fuels for knock rating of spark ignition engines would include
Q.23
The brake power of a diesel engine, keeping other parameters constant, can be increased by
Q.24
A supercharged engine as compared to an ordinary engine
Q.25
In a petrol engine, if diesel is used, then the engine will
Q.26
A diesel engine as compared to petrol engine (both running and rated load) is
Q.27
Supercharging is the process of supplying the intake air to the engine cylinder at a density _________ the density of the surrounding atmosphere.
Q.28
In a typical medium speed 4-stroke cycle diesel engines
Q.29
The octane number of petrol, generally available, is
Q.30
The cetane number of diesel oil, generally available, is
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