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If compression ratio of an engine working on Otto cycle is increased from 5 to 6, its air standard efficiency will increase by
In a IC engine The ratio of Indicated work done to frictional losses is 4 : 3. The mechanical efficiency of the engine is
Mean effective pressure multiplied by swept volume per second gives.
Thermal efficiency of an Diesel cycle is given by
r = Compression ratio
r = Cut off ratio
A S. I. engine working on C.N.G does not require the following part.
For a 6- cylinder engine for evenness of torque firing order is
The ctance number of a mixure containing 60% ISO octane and 40% n - heptane is .
With increase in temperature of intake air, I.C. engine efficiency.
Which of the following engines deve lops maximum brake power
Piston compression rings are made of which of the following
Knocking in C.I. engine occurs during which stage of combustion.
The relationship between swept volume (Vs) clearance volume (Vc) and compression ratio (r) is
For calculating compression ratio you should know the swept volume and clearance volume of the engine cylinder. Then you can use the relation,
Where, r- compression ratio, Vs- Swept Volume and Vc- Clearance Volume.
Methane burns with stoichiometric quantity of a air. The air fuel ratio by weight is
For determining ignition quality of CI engines The reference fuel used are:
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