The primary condition that results in the emission of HC in large quantities is
Select an option to see the answer and solution.
Automobile Engineering · all questionsAir Pollution and its Control in Automobile
Air Pollution and its Control in Automobile
practice.
Practice every MCQ with options. Use Show answers when you want the correct option and solution.
112
Questions
4/6
Page
Pick an option on a question to see the right answer and solution.
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?
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?
Select an option to see the answer and solution.
The hot air in a carbureted engine's intake air control system receive its heat from the
Select an option to see the answer and solution.
In the Orsat apparatus, KOH solution is used to absorb
Select an option to see the answer and solution.
Which is less harmful emission element after convert by catalytic converter?
Select an option to see the answer and solution.
Which one of the toxic component is reduced by an EGR system?
Select an option to see the answer and solution.
Upper level ozone is harmful to lungs and other biological tissue.
Select an option to see the answer and solution.
Which is the hydrocarbon emission released directly from engine to the atmosphere
Select an option to see the answer and solution.
. . . . . . . . in EGR results in some cycle partial burns and, in the extreme, total misfires.
Select an option to see the answer and solution.
The function of a resonator is that it
Select an option to see the answer and solution.
Which of the following is one of the major exhaust emissions from CI engines compared to SI engines?
Select an option to see the answer and solution.
The hydrocarbons appear due to flame quenching near the metallic walls.
Select an option to see the answer and solution.
The amount of flow in EGR, can be as high as . . . . . . . . of the total intake.
Select an option to see the answer and solution.
Which of the hydro carbon emission released after the combustion of the engine?
Select an option to see the answer and solution.
Oxides of nitrogen in the engines exhaust can be reduced by the following methods:
1. Decrease in compression ratio
2. Exhaust gas recirculation
3. Use of 5% lean mixture
4. Use of oxidation catalysts in exhaust manifold.
The correct methods are
1. Decrease in compression ratio
2. Exhaust gas recirculation
3. Use of 5% lean mixture
4. Use of oxidation catalysts in exhaust manifold.
The correct methods are
Select an option to see the answer and solution.
Which one is a non pollution gas?
Select an option to see the answer and solution.
The intake air-fuel mixture is used to push exhaust residual out of the open exhaust port called scavenging.
Select an option to see the answer and solution.
Oxides of nitrogen can be controlled by
Select an option to see the answer and solution.
Which of the following is used as antiknock compound in gasoline?
Select an option to see the answer and solution.
In spark ignition petrol engines maximum emission of Nox takes place when the air fuel ratio (A/F) is
Select an option to see the answer and solution.