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Internal Combustion Engines

Internal Combustion Engines
If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the percentage increase in efficiency will be

0.14
0.04
0.02
0.08

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Internal Combustion Engines
The scavenging efficiency of a four stroke cycle diesel engine is

Between 85 and 95%
Between 50 and 85%
Between 95 and 100%
Below 50%

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

35 bar
20 bar
10 bar
25 bar

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Internal Combustion Engines
Compression loss in I.C engines occurs due to

Leaking piston rings
Use of thick head gasket
All of these
Clogged air inlet slots

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

20 bar
25 bar
10 bar
35 bar

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Internal Combustion Engines
The knock in diesel engine occurs due to

Instantaneous and rapid burning of the first part of the charge
Reduction of delay period
Delayed burning of the first part of the charge
Instantaneous auto ignition of last part of charge

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MORE MCQ ON Internal Combustion Engines

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