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Internal Combustion Engines

Internal Combustion Engines
The mechanical efficiency (ηm) of the engine is given by

ηm = (B.P × I.P)/100
None of these
ηm = B.P/I.P
ηm = I.P/B.P

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Internal Combustion Engines
In the opposed piston diesel engine, the combustion chamber is located

Above the piston
Between the pistons
Below the piston
There is no such criterion

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Internal Combustion Engines
The pressure at the end of compression, in petrol engines, is approximately

25 bar
20 bar
35 bar
10 bar

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Internal Combustion Engines
If the compression ratio in I.C. engine increases, then its thermal efficiency will

Decrease
Increase
None of these
Remain same

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Internal Combustion Engines
The magneto in an automobile is basically

Capacitor
Transformer
D.C. generator
Magnetic circuit

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Internal Combustion Engines
The reason for supercharging in any engine is to

Increase efficiency
Effect fuel economy
Increase power
Reduce weight and bulk for a given output

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MORE MCQ ON Internal Combustion Engines

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