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Test: Engine Emissions & Their Control - 2 - Mechanical Engineering MCQ


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10 Questions MCQ Test - Test: Engine Emissions & Their Control - 2

Test: Engine Emissions & Their Control - 2 for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Test: Engine Emissions & Their Control - 2 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Engine Emissions & Their Control - 2 MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Engine Emissions & Their Control - 2 below.
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Test: Engine Emissions & Their Control - 2 - Question 1

The elements of most concern in regard to pollution caused by engines are

Test: Engine Emissions & Their Control - 2 - Question 2

One of the major exhaust emissions from Cl engines compared to SI engine is

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Test: Engine Emissions & Their Control - 2 - Question 3

Select the correct statements among the following:
1. Decrease in air - fuel ratio in SI engines results in increase of CO and UBHC.
2. NOx emission is maximum in SI engines when the air - fuel ratio is nearly stoichiometric.
3. NOx emission in SI engines will be lowest during idling.

Detailed Solution for Test: Engine Emissions & Their Control - 2 - Question 3

Test: Engine Emissions & Their Control - 2 - Question 4

Photochemical smog is mainly due to

Detailed Solution for Test: Engine Emissions & Their Control - 2 - Question 4

NO2 + energy from sunlight → NO + O + Smog

Test: Engine Emissions & Their Control - 2 - Question 5

Which of the following catalyst material promotes the reaction of NOx ?

Detailed Solution for Test: Engine Emissions & Their Control - 2 - Question 5

The catalyst materials most used in catalytic converter are platinum, palladium, and rhodium. Palladium and platinum promote the oxidation of CO and HC. Rhodium promotes the reaction of NOx.

Test: Engine Emissions & Their Control - 2 - Question 6

Alcohol is the major source for the emission of

Detailed Solution for Test: Engine Emissions & Their Control - 2 - Question 6

Major emission problem when alcohol fuel is used is generation of aldehydes, an eye and respiratory irritant.

Test: Engine Emissions & Their Control - 2 - Question 7

Blue smoke in diesel engines indicate

Test: Engine Emissions & Their Control - 2 - Question 8

Thermal converter cannot reduce emission of

Test: Engine Emissions & Their Control - 2 - Question 9

Efficient operation of catalytic converters require maintenance of
1. temperature
2. equivalence ratio
3. pressure
4. direction of exhaust flow
Q. Select the correct statements from above:

Test: Engine Emissions & Their Control - 2 - Question 10

EGR is the most effective way of reducing emission of

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