INTERNAL COMBUSTION ENGINES QUIZ

125°

200°

180°

235°

Compression ratio

None of these

Speed of engine

Fuel used

Excessive turbulence which removes most of the insulating gas boundary layer from the cylinder walls

None of these

Increase in the rate of heat transfer, there is a reduction in the power output and efficiency of the engine

High intensity of knock causes crankshaft vibration and the engine runs rough

1 sec

0.001 sec

0.01 sec

0.1 sec

Octane number

Cetane number

Calorific value

None of the listed here

60-80 kg/cm²

20-25 kg/cm²

90-130 kg/cm²

5-10 kg/cm²

Quantitative governing

Qualitative governing

Higher maximum temperature

Hit and miss governing

0.3 kg

0.35 kg

0.25 kg

0.2 kg

All of these

Geometry of the reflector

Properties of the reflector

Energy of neutrons

75% iso-octane and 25% normal heptane

75% diesel and 25% petrol

75% petrol and 25% diesel

75% normal heptane and 25% iso-octane