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Internal Combustion Engines

Internal Combustion Engines
Excess quantities of sulphur in diesel fuel are Objectionable because it may cause the following

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Internal Combustion Engines
The basic requirement of a good combustion chamber is

Low compression ratio
Minimum turbulence
High thermal efficiency and power output
Low volumetric efficiency

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Internal Combustion Engines
In the crankcase method of scavenging, the air pressure is produced by

Natural aspirator
Supercharger
Centrifugal pump
Movement of engine piston

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Internal Combustion Engines
Gaseous fuel guarantees are based on

Low heat value of oil
Mean heat value of oil
High heat value of oil
Calorific value of oil

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Internal Combustion Engines
The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be

1
0.5
0.25
0.7

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Internal Combustion Engines
Does the supply of scavenging air at a density greater than that of atmosphere mean engine is supercharged?

Unpredictable
No
Yes
To some extent

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