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Internal Combustion Engines

Internal Combustion Engines
If the temperature of intake air in internal combustion engine increases, then its efficiency will

None of the listed here
Decrease
Increase
Remain same

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Internal Combustion Engines
In a cycle, the spark lasts roughly for

0.01 sec
0.001 sec
0.1 sec
1 sec

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Internal Combustion Engines
A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of

75% petrol and 25% diesel
75% diesel and 25% petrol
75% iso-octane and 25% normal heptane
75% normal heptane and 25% iso-octane

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Internal Combustion Engines
The Cipoletti weir is a __________ weir.

Triangular
Trapezoidal
Circular
Rectangular

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

ηm = (B.P × I.P)/100
ηm = B.P/I.P
ηm = I.P/B.P
None of the listed here

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Internal Combustion Engines
The correct mixture strength (by weight) for petrol is about

18.5 : 1
22.6 : 1
20.4 : 1
14.6 : 1

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MORE MCQ ON Internal Combustion Engines

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