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Internal Combustion Engines

Internal Combustion Engines
In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have

Long ignition delay
Low temperature
Low density
All of these

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Internal Combustion Engines
Air fuel ratio for idling speed of a petrol engine is approximately

0.41736111111111
0.62569444444444
0.042361111111111
0.20902777777778

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Internal Combustion Engines
If V₁ is the jet velocity and V₀ is the vehicle velocity, then the propulsive efficiency of a rocket is given by

V₀/(V₀ + V₁)
[2(V₀/V₁)]/ [1 + (V₀/V₁)²]
(V₀/V₁)/ [1 + (V₀/V₁)²]
V₁/(V₀ + V₁)

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Internal Combustion Engines
The brake power is the power available

In the engine cylinder
At the crank pin
At the crank shaft
None of these

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Internal Combustion Engines
A 5 BHP engine running at full load would consume diesel of the order of

1 kg/hr
0.3 kg/hr
5 kg/hr
3 kg/hr

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Internal Combustion Engines
If one cylinder of a diesel engine receives more fuel than the others, then for that cylinder the

Exhaust will be smoky
Engine starts overheating
Piston rings would stick into piston grooves
Scavenging occurs

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MORE MCQ ON Internal Combustion Engines

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