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McqMate
Chapters
1. |
The major contributor of Carbon monoxide is |
A. | Motor vehicle |
B. | Industrial processes |
C. | Stationary fuel combustion |
D. | None of the above |
Answer» A. Motor vehicle |
2. |
Apart from hydrocarbons, the main pollutants in the engine exhaust are |
A. | CO and CO2 |
B. | CO2 and NOx |
C. | CO and NOx |
D. | CO2 and H2O |
Answer» C. CO and NOx |
3. |
Maximum allowable hydrocarbon in the car emission are approximately |
A. | 10 ppm |
B. | 100 ppm |
C. | 1000 ppm |
D. | 5000 ppm |
Answer» B. 100 ppm |
4. |
CO in the exhaust of a car engine should not be more than: |
A. | 0.5% |
B. | 2% |
C. | 5% |
D. | 10% |
Answer» A. 0.5% |
5. |
The PCV (Positive Crankcase Ventilation) valve is located between the |
A. | Air cleaner and the carburetor |
B. | Carburetor and the intake manifold |
C. | Intake manifold and air cleaner |
D. | Intake manifold and crankcase |
Answer» D. Intake manifold and crankcase |
6. |
In case of engines backfiring, the PCV valve: |
A. | Opens maximum |
B. | Closes |
C. | Disintegrates |
D. | Sticks in the centre position |
Answer» B. Closes |
7. |
The position of the PCV valve plunger at idle speed is |
A. | Towards the valve outlet side |
B. | Towards the valve inlet side |
C. | Towards the crankcase |
D. | Near the valve centre |
Answer» A. Towards the valve outlet side |
8. |
The function of charcoal granules is to absorb: |
A. | Water vapour |
B. | Carbon monoxide |
C. | Petrol Vapour |
D. | Liquid petrol |
Answer» C. Petrol Vapour |
9. |
The liquid – vapour separator is located near the |
A. | Fuel tank |
B. | Carburettor |
C. | Charcoal canister |
D. | Purge valve |
Answer» A. Fuel tank |
10. |
EGR (Exhaust Gas Recirculation) system is employed for controlling emissions of: |
A. | HC |
B. | CO |
C. | NOx |
D. | HC and CO |
Answer» C. NOx |
11. |
The main purpose of the diverter valve in the air injection system is to |
A. | Close the check valve |
B. | Prevent back fire in the exhaust system |
C. | Prevent backfire in the inlet manifold |
D. | Weaken the air-fuel mixture |
Answer» B. Prevent back fire in the exhaust system |
12. |
The catalyst used in the reduction converter is |
A. | Copper |
B. | Charcoal |
C. | Rodium |
D. | Platinum |
Answer» C. Rodium |
13. |
The catalyst used in the converter for oxidizing HC and CO is |
A. | Copper |
B. | Charcoal |
C. | Rodium |
D. | Platinum |
Answer» D. Platinum |
14. |
In a three-way converter, the first converter controls |
A. | HC |
B. | CO |
C. | NOx |
D. | All of these |
Answer» C. NOx |
15. |
The air fuel ratio required for the efficient operation of a three approximately |
A. | 5:1 |
B. | 10:1 |
C. | 15:1 |
D. | 20:1S |
Answer» C. 15:1 |
16. |
Which stage of vehicle emission norms presently applicable in India in Internal Combustion Engine? |
A. | Bharat Stage V |
B. | Bharat Stage IV |
C. | Bharat Stage III |
D. | Bharat Stage II |
Answer» B. Bharat Stage IV |
17. |
Which of the following is one of the major exhaust emissions from CI engines compared to SI engines? |
A. | Oxides of nitrogen |
B. | Particulates |
C. | CO and CO2 |
D. | Unburnt hydrocarbon |
Answer» B. Particulates |
18. |
Which of the following causes the photochemical smog? |
A. | Excess O2 |
B. | CO and CO2 |
C. | Soot and particulate matter |
D. | NOx and HC |
Answer» D. NOx and HC |
19. |
What does the blue smoke in diesel engine indicate? |
A. | Unburnt oil |
B. | HC |
C. | NOx |
D. | CO |
Answer» A. Unburnt oil |
20. |
During which condition of the vehicle does NOx emission in SI engine will be lowest? |
A. | Cruising |
B. | Idling |
C. | Accelerating |
D. | Decelerating |
Answer» B. Idling |
21. |
For what purpose is the Rhodium used? |
A. | To reduce CO and HC |
B. | To reduce NOx |
C. | To reduce CO |
D. | To reduce HC |
Answer» B. To reduce NOx |
22. |
Why are lead compounds added in petrol? |
A. | Reduce knocking |
B. | Reduce HC emission |
C. | Reduce exhaust temperature |
D. | Increase power output |
Answer» B. Reduce HC emission |
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