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

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

Low temperature

Low density

All of these

Long ignition delay

Low temperature

Low density

All of these

Long ignition delay

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Internal Combustion Engines
The mechanical efficiency (ηm) of the engine is given by

ηm = I.P/B.P

ηm = (B.P × I.P)/100

None of the listed here

ηm = B.P/I.P

ηm = I.P/B.P

ηm = (B.P × I.P)/100

None of the listed here

ηm = B.P/I.P

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Internal Combustion Engines
In a typical medium speed 4-stroke cycle diesel engines

May open and close anywhere

Exhaust valve opens just after bottom dead center and closes just before top dead center

Exhaust valve opens at bottom dead center and closes at top dead center

Exhaust valve opens at 35Â° before bottom dead center and closes at 20Â° after top dead center

May open and close anywhere

Exhaust valve opens just after bottom dead center and closes just before top dead center

Exhaust valve opens at bottom dead center and closes at top dead center

Exhaust valve opens at 35Â° before bottom dead center and closes at 20Â° after top dead center

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Internal Combustion Engines
Pour point of fuel oil is the

Temperature at which it solidifies or congeals

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

It catches fire without external aid

Temperature at which it solidifies or congeals

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

It catches fire without external aid

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Internal Combustion Engines
In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of

2000Â°C

500Â°C

1000Â°C

250Â°C

2000Â°C

500Â°C

1000Â°C

250Â°C

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

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

May open and close anywhere

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

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

May open and close anywhere

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

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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

Internal Combustion Engines The mechanical efficiency (ηm) of the engine is given by

Internal Combustion Engines In a typical medium speed 4-stroke cycle diesel engines

Internal Combustion Engines Pour point of fuel oil is the

Internal Combustion Engines In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of

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

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

Internal Combustion Engines
The mechanical efficiency (ηm) of the engine is given by

Internal Combustion Engines
In a typical medium speed 4-stroke cycle diesel engines

Internal Combustion Engines
Pour point of fuel oil is the

Internal Combustion Engines
In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of

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