Internal Combustion Engines MCQs

Question 1

Method of governing used in petrol engine is

Accepted Answer

Quantity governing

Answer

Quality governing

Answer

Combined governing

Answer

Partial governing

Question 2

Pick up false statement

Accepted Answer

In quality governing, quantity of fuel is varied to suit the load and total charge of air is varied

Answer

For petrol and large gas engines, quantity governing is preferred

Answer

In quantity governing, air fuel ratio is almost constant and quantity of charge is changed depending on load

Answer

In hit and miss governing, fuel supply is completely cut off during one or more number of cycles

Question 3

Method of governing used in diesel engine is

Accepted Answer

Quality governing

Answer

Quantity governing

Answer

Combined governing

Answer

Partial governing

Question 4

An engine has a normal speed of 960 r.p.m. and no load speed of 1000 r.p.m. The speed droop of governor will be about

Accepted Answer

4%

Answer

2%

Answer

8%

Answer

12%

Question 5

An engine at half load begins to act with an increasing load at 970 r.p.m. and with a decreasing load at 980 r.p.m. The sensitivity of governor is

Accepted Answer

1%

Answer

5%

Answer

2%

Answer

0.50%

Question 6

The bi-fuel engine uses

Accepted Answer

Liquid fuel during start up and gas as the basic fuel

Answer

Two fuels used in two combustion chambers

Answer

Gas fuel during start up and liquid fuel as basic fuel

Answer

Can work on two fuels but the one most economical is used

Question 7

Morse test is used to determine mechanical efficiency of

Accepted Answer

Multi-cylinder engines.

Answer

Single cylinder C.I. engine

Answer

Two stroke engines

Answer

Four-storke engines

Question 8

During idling stage, gasoline does not flow through the carburetor tube because of

Accepted Answer

Venturi vacuum

Answer

Pressure drop

Answer

High pressure

Answer

It is not desired to be passed through main tube

Question 9

Thermal efficiency of I.C. engine on weak mixture is

Accepted Answer

Higher

Answer

Lower

Answer

Unaffected

Answer

Higher/lower depending on engine rating