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Air Pollution and its Control in Automobile MCQ Questions & Answers | Automobile Engineering

Learn and Practice Air Pollution and its Control in Automobile MCQ Questions & Answers are Available for Automobile Engineering Students to Clear GATE Exams, Technical Interviews, Competitive Examinations, and Other Entrance Exams. The Air Pollution and its Control in Automobile Chapter is Especially Important for Automobile Engineering and GATE Students.

Each section contains 100 MCQs on Air Pollution and its Control in Automobile .
1
What is the purpose of crank case ventilation?
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Answer & Solution
Answer: Option A
No explanation is given for this question. Let's Discuss on Board
2
Where EGR valve connected?
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Answer & Solution
Answer: Option A
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3
A . . . . . . . . reduction of cold-start HC has been achieved.
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Answer & Solution
Answer: Option C
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4
In a petrol fuel injected engine, the air and fuel are mixed in the
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Answer & Solution
Answer: Option C
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5
Reduction of formation of pollutants is achieved by:
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Answer & Solution
Answer: Option D
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6
Pune-based organisation . . . . . . . . conducted a study using a 15% M - 15 methanol blend in vehicles and tested them for 3,000 km to evaluate emissions in real-world conditions as well as to check the performance of the vehicles.
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Answer & Solution
Answer: Option A
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7
Why are lead compounds added in petrol?
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Answer & Solution
Answer: Option A
Solution:
Knocking is an undesirable phenomenon in petrol engines.
It happens when the air-fuel mixture in the cylinder ignites prematurely and uncontrollably.
This creates pressure waves that can damage the engine and reduce its efficiency.

Lead compounds, like tetraethyl lead (TEL), were historically added to petrol to increase the octane rating.
A higher octane rating makes petrol more resistant to knocking.

Therefore, the primary reason for adding lead compounds was to reduce or prevent knocking.

The other options are incorrect because:
Option B: While some additives *might* have a minor effect on HC emissions, it wasn't the main reason for using lead.
Option C: Lead compounds don't directly reduce exhaust temperature.
Option D: Lead compounds primarily improved engine efficiency by preventing knocking, but didn't directly "increase power output" as their main function.
8
Idling co-emission for all two and three wheeled petrol vehicles should not exceed . . . . . . . . by volume.
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Answer & Solution
Answer: Option B
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9
More than 90 to 95% of carbon particles originally generated within an engine are thus converted to CO
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Answer & Solution
Answer: Option A
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10
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.
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Answer & Solution
Answer: Option B
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