Internal Combustion Engines MCQs

Question 1

In petrol engine using fuel having fixed octane rating, increase in compression ratio will

Accepted Answer

Increase the knocking tendency

Answer

Decrease the knocking tendency

Answer

Not affect the knocking tendency

Answer

Increase or decrease knocking tendency depending on strength and time of spark

Question 2

In carburetors, the top of the fuel jet with reference to the level in the float chamber is kept at

Accepted Answer

Slightly higher level

Answer

Same level

Answer

Slightly lower level

Answer

May be anywhere

Question 3

Carburetion is done to

Accepted Answer

Break up and mix the petrol with air

Answer

Feed petrol into cylinder

Answer

Govern the engine

Answer

Heat up the charge to cylinder

Question 4

Power impulses from an I.C. engine are smoothed out by

Accepted Answer

Flywheel

Answer

Governor

Answer

Crank shaft

Answer

Gear box

Question 5

The theoretically correct mixture of air and petrol is approximately

Accepted Answer

15 : 1

Answer

8 : 1

Answer

12 : 1

Answer

20 : 1

Question 6

For low speed operation or for idling in petrol engines, the engine requirements are for

Accepted Answer

Rich mixture

Answer

Lean mixture

Answer

Theoretically correct mixture

Answer

Any type of mixture

Question 7

In petrol engines, advancing the spark timing will

Accepted Answer

Increase the knocking tendency

Answer

Decrease the knocking tendency

Answer

Not affect the knocking tendency

Answer

Increase or decrease knocking tendency depending on strength and time of spark

Question 8

The following type of carburetor is preferred

Accepted Answer

Concentric type

Answer

Eccentric type

Answer

Horizontal type

Answer

Vertical type

Question 9

The essential equipment for producing high voltage for sparking in petrol engines with battery is

Accepted Answer

Ignition coil, contact breaker and condenser

Answer

Ignition coil

Answer

Ignition coil and condenser

Answer

Ignition coil and contact breaker