A mixture containing 65% of iso-octane and 35% of normal heptane will have

Internal Combustion Engines
A mixture containing 65% of iso-octane and 35% of normal heptane will have

Octane number 65

Cetane number 35

Cetane number 65

Octane number 35

Octane number 65

Cetane number 35

Cetane number 65

Octane number 35

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Internal Combustion Engines
The term scavenging is generally associated with

Aeroplane engines

4-stroke cycle engines

2-stroke cycle engines

High efficiency engines

Aeroplane engines

4-stroke cycle engines

2-stroke cycle engines

High efficiency engines

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Internal Combustion Engines
Pour point of fuel oil is the

Temperature at which it solidifies or congeals

Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame

It catches fire without external aid

Indicated by 90% distillation temperature i.e., when 90% of sample oil has distilled off

Temperature at which it solidifies or congeals

Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame

It catches fire without external aid

Indicated by 90% distillation temperature i.e., when 90% of sample oil has distilled off

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Internal Combustion Engines
The minimum cranking speed in case of petrol engine is about

250 - 300 rpm

One fourth of operating speed

Half the operating speed

60 - 80 rpm

250 - 300 rpm

One fourth of operating speed

Half the operating speed

60 - 80 rpm

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Internal Combustion Engines
In order to eliminate knocking in compression ignition engines, there should be

Late auto-ignition

Low compression ratio

Short delay period

High self ignition temperature of fuel

Late auto-ignition

Low compression ratio

Short delay period

High self ignition temperature of fuel

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Internal Combustion Engines
Detonation is harmful due to

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

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

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

None of these

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

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

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

None of these

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Internal Combustion Engines

Internal Combustion Engines A mixture containing 65% of iso-octane and 35% of normal heptane will have

Internal Combustion Engines The term scavenging is generally associated with

Internal Combustion Engines Pour point of fuel oil is the

Internal Combustion Engines The minimum cranking speed in case of petrol engine is about

Internal Combustion Engines In order to eliminate knocking in compression ignition engines, there should be

Internal Combustion Engines Detonation is harmful due to

Internal Combustion Engines
A mixture containing 65% of iso-octane and 35% of normal heptane will have

Internal Combustion Engines
The term scavenging is generally associated with

Internal Combustion Engines
Pour point of fuel oil is the

Internal Combustion Engines
The minimum cranking speed in case of petrol engine is about

Internal Combustion Engines
In order to eliminate knocking in compression ignition engines, there should be

Internal Combustion Engines
Detonation is harmful due to