Air Pollution and its Control in Automobile MCQs

Question 1

The exhaust of CI engines does not contain solid carbon soot particles that are generated in the fuel-rich zones within the cylinder during combustion.

Accepted Answer

False

Answer

True

Question 2

Which engine emits more amounts of nitrogen oxides (NOx)?

Accepted Answer

Compressed ignition engine

Answer

Spark ignition engine

Answer

Two stroke engine

Answer

LPG engine

Question 3

EGR combines with the exhaust residual left in the cylinder from the previous cycle to effectively reduce the . . . . . . . . . combustion temperature.

Accepted Answer

Maximum

Answer

Minimum

Answer

Unpredictable

Answer

None of the mentioned

Question 4

When scavenging is done, some of the air and fuel mix with the exhaust gases and are expelled out of the cylinder before the exhaust port closes.

Accepted Answer

True

Answer

False

Question 5

The main function of the intake manifold is that it

Accepted Answer

Distributes intake air equally to the cylinders

Answer

Cools the intake air to a suitable temperature

Answer

Promotes the mixture of air and fuel

Answer

Reduces intake noise

Question 6

EGR system recirculates a smallmetered amount of the inert exhaust gas back into the intake manifold:

Accepted Answer

To reduce peak combustion temperature and lower the formation of NO

Answer

To reduce the combustion temperature and lower the formation of N2

Answer

To increase peak combustion temperature and lower the formation of NO

Answer

To reduce the exhaust gas temperature and lower the formation of particulate matter

Question 7

A single soot particle may contain up to . . . . . . . . carbon spheres.

Accepted Answer

5000

Answer

600

Answer

6000

Answer

8000

Question 8

The liquid-vapour separator is located in the

Accepted Answer

Fuel tank

Answer

Carburettor

Answer

Canister

Answer

Purge valve

Question 9

Why is the fumigation technique used?

Accepted Answer

To control smoke

Answer

To control HC

Answer

To control NOx

Answer

To control CO