26. The purpose of employing supercharging for an engine is-

A. to provide forced cooling

B. to inject excess fuel for coping with higher load

C. to raise exhaust pressure

D. to supply an intake of air at a density greater than the density of the surrounding atmosphere

Click for Answer/Explanation

Correct Answer is D

With Supercharging a greater mass flow rate is provided, hence more oxygen to support combustion. This allows more fuel to be burned and more work per cycle.

27. Which one of these fuels can be obtained by fermentation of vegetable matters-

A. Alcohol

B. Gasoline

C. Diesel

D. Benzene

Click for Answer/Explanation

Correct Answer is A

28. Which of the following cannot be controlled by a three-way catalytic converter?

Read More- Refrigeration and Air Conditioning Objective Questions

A. CO Emission

B. HC Emission

C. SPM Emission

D. NOx

Click for Answer/Explanation

Correct Answer is C

three-way catalytic converter-

  • Palladium → CO
  • Rhodium → NOx
  • Platinum → HC

Cannot control the emission of particulate matters

29.

Please Comment Below