Air Pollution and its Control in Automobile MCQs

Question 1

Purging of the charcoal canister occurs when

Accepted Answer

Air flows through the canister on its way to the intake manifold

Answer

Air flow from the fuel tank flows through the canister

Answer

Air flows from the float bowls through the canister

Answer

Air flows through the canister on its way to the exhaust manifold

Question 2

Cyanuric acid is a . . . . . . . . solid material that sublimes in the exhaust flow.

Accepted Answer

Low-cost

Answer

High-cost

Answer

Unpredictable

Answer

None of the mentioned

Question 3

Which of the following are the separable methods used in exhaust gas measurement?

Accepted Answer

All of the above

Answer

Orsat gas analyzer

Answer

Gas chromatography

Answer

Flame ionization detector

Question 4

Engine emits white smoke due to

Accepted Answer

Excessive oil with fuel

Answer

Excessive lean mixture

Answer

Excessive rich mixture

Answer

Worn out piston rings

Question 5

Which of the following cannot be reduced by thermal converters?

Accepted Answer

NOx

Answer

CO

Answer

HC

Answer

Soot

Question 6

Ozone is harmful to plants and trees and causes very heavy crop losses each year.

Accepted Answer

True

Answer

False

Question 7

Diatomic oxygen is highly reactive and initiates a number of different reactions.

Accepted Answer

False

Answer

True

Question 8

In Diesel engines, the control of black smoke in the exhaust can be achieved by: 1. Running the engine at lower load. 2. Maintaining the injection system perfect. 3. Using Diesel fuel of higher Cetane number. Which of the above statements are correct?

Accepted Answer

1 and 2 only

Answer

1, 2 and 3

Answer

1 and 3 only

Answer

2 and 3 only

Question 9

The correct function of EGR system is

Accepted Answer

To recirculate a portion of exhaust gas

Answer

To re-burn blow-by gas

Answer

To burn fuel vapour gasses

Answer

To prevent blow-by from occuring