Related Questions

In practice, the compression ratio of compression-ignition (CI) engine ranges from
A 15 to 25
B 5 to 10
C 40 to 55
D 60 to 70
The compression ratio in petrol engine is kept less than in Diesel engine because
A It makes petrol engines lighter
B Higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition
C Less compression ratio gives better performance
D It is just customary to have less compression ratio in petrol engines
The efficiency of an Otto engine compared to that of a diesel engine, for the same compression ratio will be
A More
B Less
C Same
D Data insufficient to predict
Highest useful compression ratio (HUCR) is the highest compression ratio at which the
A Engine can run
B Engine gives maximum output
C Engine is most efficient
D Fuel can be used in a test engine without knocking
Ratio of permissible stress in direct compression and bending compression is
A Less than 1
B Between 1 and 1.5
C Between 1.5 and 2.0
D Greater than 2
In diesel engine, the compression ratio in comparison to expansion ratio is
A Same
B Less
C More
D Variable
An engine pulls four identical carriages. The engine is 2/3 the length of a carriage and the total length of the train is 86.8m. Find the length of the engine.
A 12.4m
B 12m
C 11.5m
D 13m
A two stroke cycle engine gives ________ the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.
A Half
B Same
C Double
D Four times
If the engine coolant leaks into the engine oil, then engine oil
A Appears milky
B Become foamy
C Turns black
D None of these
The work done in isothermal compression compared to that in adiabatic compression will be
A Less
B More
C Same
D More or less depending upon the extent of work done

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