INTERNAL COMBUSTION ENGINES QUIZ

A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of

75% iso-octane and 25% normal heptane

75% diesel and 25% petrol

75% petrol and 25% diesel

75% normal heptane and 25% iso-octane

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is false statement? Some of the methods used to reduce diesel smoke are as follows

Increasing the compression ratio

Adherence to proper fuel specification

Using additives in the fuel

Avoidance of overloading

TRUE ANSWER : ?
YOUR ANSWER : ?

The air standard efficiency of an I.C. engine depends on

Speed of engine

None of these

Compression ratio

Fuel used

TRUE ANSWER : ?
YOUR ANSWER : ?

As a result of detonation in an I.C. engine, following parameter attains very high value

Peak pressure

Peak temperature

Rate of rise of temperature

Rate of rise of pressure

TRUE ANSWER : ?
YOUR ANSWER : ?

The colour of exhaust from diesel engine is generally

White

Black

Violet

Bluish

TRUE ANSWER : ?
YOUR ANSWER : ?

In loop scavenging, the top of the piston is

Contoured

Slanted

Flat

Depressed

TRUE ANSWER : ?
YOUR ANSWER : ?

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

43832

2

4

1

TRUE ANSWER : ?
YOUR ANSWER : ?

The pressure inside the cylinder is _________ the atmospheric pressure during the exhaust stroke.

Above

None of these

Below

Equal to

TRUE ANSWER : ?
YOUR ANSWER : ?

Diesel as compared to petrol is

More difficult to ignite

None of these

Highly ignitable

Less difficult to ignite

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following statement is correct regarding normal cetane?

It is a standard fuel used for knock rating of diesel engines

Its chemical name is normal hexadecane

It has long carbon chain structure

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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