A stoichiometric air-fuel ratio is

Internal Combustion Engines
A stoichiometric air-fuel ratio is

Rich mixture for over loads

Lean mixture

Chemically correct mixture

Rich mixture for idling

Rich mixture for over loads

Lean mixture

Chemically correct mixture

Rich mixture for idling

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Internal Combustion Engines
The fuel valve in a four stroke cycle diesel engine

May open and close anywhere

Opens at 15° after top dead center and closes at 20° before bottom dead center

Opens at top dead center and closes at bottom dead center

Opens at 15° before top dead center and closes at 20° after top dead center

May open and close anywhere

Opens at 15° after top dead center and closes at 20° before bottom dead center

Opens at top dead center and closes at bottom dead center

Opens at 15° before top dead center and closes at 20° after top dead center

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Internal Combustion Engines
The calorific value of gaseous fuels is expressed in terms of

kcal/kg

kcal/mÂ²

kcal/m3

kcal

kcal/kg

kcal/mÂ²

kcal/m3

kcal

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Internal Combustion Engines
Pour point of fuel oil is the

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

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

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Internal Combustion Engines
The knock in diesel engine occurs due to

Reduction of delay period

Delayed burning of the first part of the charge

Instantaneous auto ignition of last part of charge

Instantaneous and rapid burning of the first part of the charge

Reduction of delay period

Delayed burning of the first part of the charge

Instantaneous auto ignition of last part of charge

Instantaneous and rapid burning of the first part of the charge

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Internal Combustion Engines
The working cycle in case of four stroke engine is completed in following number of revolutions of crankshaft

43832

1

4

2

43832

1

4

2

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Internal Combustion Engines

Internal Combustion Engines A stoichiometric air-fuel ratio is

Internal Combustion Engines The fuel valve in a four stroke cycle diesel engine

Internal Combustion Engines The calorific value of gaseous fuels is expressed in terms of

Internal Combustion Engines Pour point of fuel oil is the

Internal Combustion Engines The knock in diesel engine occurs due to

Internal Combustion Engines The working cycle in case of four stroke engine is completed in following number of revolutions of crankshaft

Internal Combustion Engines
A stoichiometric air-fuel ratio is

Internal Combustion Engines
The fuel valve in a four stroke cycle diesel engine

Internal Combustion Engines
The calorific value of gaseous fuels is expressed in terms of

Internal Combustion Engines
Pour point of fuel oil is the

Internal Combustion Engines
The knock in diesel engine occurs due to

Internal Combustion Engines
The working cycle in case of four stroke engine is completed in following number of revolutions of crankshaft