IC Engine Questions and Answers – Reducing Emissions by Chemical Methods

This set of IC Engines Multiple Choice Questions & Answers (MCQs) focuses on “Reducing Emissions by Chemical Methods”.

1. Cyanuric acid is a ____________ solid material that sublimes in the exhaust flow.
a) high-cost
b) low-cost
c) unpredictable
d) none of the mentioned
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2. ____________ are materials that absorb selected molecular compounds and catalyze chemical reactions.
a) Catalysts
b) Chromium
c) Zeolite
d) None of the mentioned
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3. ____________ is collected during engine startup time when the catalytic converter is cold, and then later released back into the exhaust flow when the converter is hot.
a) HC
b) CO
c) CO₂
d) H₂O
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4. A ____________ reduction of cold-start HC has been achieved.
a) 20%
b) 30%
c) 35%
d) 40%
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5. H₂ emissions occur under ____________ operating conditions.
a) rich
b) lean
c) constant
d) none of the mentioned
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6. Exhaust gas recycle is done by ducting some of the exhaust flow back into the intake system.
a) True
b) False
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7. The amount of flow in EGR, can be as high as ____________ of the total intake.
a) 20%
b) 30%
c) 35%
d) 40%
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8. EGR combines with the exhaust residual left in the cylinder from the previous cycle to effectively reduce the ____________ combustion temperature.
a) minimum
b) maximum
c) unpredictable
d) none of the mentioned
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9. The flow rate of EGR is not controlled by the Engine management system.
a) True
b) False
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10. ____________ in EGR results in some cycle partial burns and, in the extreme, total misfires.
a) Decrease
b) Increase
c) Consistency
d) None of the mentioned
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Sanfoundry Global Education & Learning Series – IC Engine.

To practice all areas of IC Engine, here is complete set of 1000+ Multiple Choice Questions and Answers.