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Mechanical Engineering · Q245

Internal Combustion Engines (I.C. Engines)

Engineering and GATE · Mechanical Engineering · question 245

Q245

The term scavenging is generally associated with

A.
2-stroke cycle engines
B.
4-stroke cycle engines
C.
Aeroplane engines
D.
High efficiency engines
Answer

Answer: Option D

Solution

Answer: Option D
Solution:
The term scavenging is generally associated with High efficiency engines. In Automobiles, Scavenging is a process of pushing exhaust gas out of the cylinder and drawing in fresh draught of air or air fuel mixture for the next cycle. The process is essential in having a smooth running of I.C. Engine. If scavenging is incomplete the following stroke will begin with a mix of exhaust fumes rather than clean air. This may be insufficient for poor combustion which leading to poor running condition on an engine. Scavenging is equally important for both 2 Stroke and 4 Stroke Engine. However, it is more difficult to achieve in 2 Stroke engine.
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