The mechanical efficiency (Î·m) of the engine is given by

Internal Combustion Engines
The mechanical efficiency (Î·m) of the engine is given by

Î·m = B.P/I.P

None of these

Î·m = I.P/B.P

Î·m = (B.P Ã— I.P)/100

Î·m = B.P/I.P

None of these

Î·m = I.P/B.P

Î·m = (B.P Ã— I.P)/100

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Internal Combustion Engines
The thermal efficiency of a petrol engine is _________ as compared to diesel engine.

None of these

Same

Less

More

None of these

Same

Less

More

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Internal Combustion Engines
Which of the following statement is correct regarding petrol engines?

All of these

The fuel is first evaporated after passing through a carburettor and is mixed with air before ignition

A fine fuel spray mixed with air is ignited by the heat of compression which is at a high pressure

The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug

All of these

The fuel is first evaporated after passing through a carburettor and is mixed with air before ignition

A fine fuel spray mixed with air is ignited by the heat of compression which is at a high pressure

The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug

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Internal Combustion Engines
The specific fuel consumption of a petrol engine compared to diesel engine of same H.P. is

Same

Less

More

Less or more depending on operating conditions

Same

Less

More

Less or more depending on operating conditions

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Internal Combustion Engines
A fuel of cetane number 40 has the same ignition quality as a mixture of

40% petrol and 60% diesel

40% diesel and 60% petrol

40% cetane and 60% alpha methyl naphthalene

40% alpha methyl naphthalene and 60% cetane

40% petrol and 60% diesel

40% diesel and 60% petrol

40% cetane and 60% alpha methyl naphthalene

40% alpha methyl naphthalene and 60% cetane

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Internal Combustion Engines
Pour point of fuel oil is the

It catches fire without external aid

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

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

Temperature at which it solidifies or congeals

It catches fire without external aid

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

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

Temperature at which it solidifies or congeals

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Internal Combustion Engines

Internal Combustion Engines The mechanical efficiency (Î·m) of the engine is given by

Internal Combustion Engines The thermal efficiency of a petrol engine is _________ as compared to diesel engine.

Internal Combustion Engines Which of the following statement is correct regarding petrol engines?

Internal Combustion Engines The specific fuel consumption of a petrol engine compared to diesel engine of same H.P. is

Internal Combustion Engines A fuel of cetane number 40 has the same ignition quality as a mixture of

Internal Combustion Engines Pour point of fuel oil is the

Internal Combustion Engines
The mechanical efficiency (Î·m) of the engine is given by

Internal Combustion Engines
The thermal efficiency of a petrol engine is _________ as compared to diesel engine.

Internal Combustion Engines
Which of the following statement is correct regarding petrol engines?

Internal Combustion Engines
The specific fuel consumption of a petrol engine compared to diesel engine of same H.P. is

Internal Combustion Engines
A fuel of cetane number 40 has the same ignition quality as a mixture of

Internal Combustion Engines
Pour point of fuel oil is the