INTERNAL COMBUSTION ENGINES QUIZ

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

Cetane number 35

Cetane number 65

Octane number 65

Octane number 35

TRUE ANSWER : ?
YOUR ANSWER : ?

Pre-ignition is caused by the spontaneous combustion of the mixture before the end of the compression stroke, and is due to

Overheated spark plug points

Red hot carbon deposits on cylinder walls

Cylinder walls being too hot

Any one of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

A flow in which the quantity of liquid flowing per second is constant, is called __________ flow.

Turbulent

Streamline

Steady

Unsteady

TRUE ANSWER : ?
YOUR ANSWER : ?

If petrol is used in a diesel engine, then

Efficiency will be low

Higher knocking will occur

Black smoke will be produced

Low power will be produced

TRUE ANSWER : ?
YOUR ANSWER : ?

In a four stroke cycle diesel engine, the compression

Starts at top dead center and ends at 40° before bottom dead center

Starts at 40° before top dead center and ends at 40° after top dead center

Starts at 40° after bottom dead center and ends at 10° before top dead center

May start and end anywhere

TRUE ANSWER : ?
YOUR ANSWER : ?

Alpha-methyl-naphthalene (C₁₁ H₁₀) has a cetane number of

120

0

100

50

TRUE ANSWER : ?
YOUR ANSWER : ?

In a four stroke cycle petrol engine, the charge is ignited at

30° after top dead center

30° after bottom dead center

30° before bottom dead center

30° before top dead center

TRUE ANSWER : ?
YOUR ANSWER : ?

The inlet value of a four stroke cycle I.C engine remains open for nearly

200Â°

125Â°

180Â°

235Â°

TRUE ANSWER : ?
YOUR ANSWER : ?

Most high speed compression engines operate on

Diesel cycle

Special type of air cycle

Otto cycle

Dual combustion cycle

TRUE ANSWER : ?
YOUR ANSWER : ?

For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of

0.50069444444444

0.62569444444444

0.37569444444444

0.75069444444444

TRUE ANSWER : ?
YOUR ANSWER : ?