Question

Crankcase scavenging arrangement is very economical and inefficient in operation.

(a) True

(b) False

I have been asked this question by my college director while I was bunking the class.

The origin of the question is Scavenging Pumps topic in portion Two Stroke Engines of IC Engine

Answer 1

Answer: (a) True

Explanation:

Crankcase scavenging is an economical method because it utilizes the crankcase to pressurize the fuel-air mixture, which helps in scavenging the exhaust gases. However, it is often considered inefficient in operation because the crankcase pressure is not always optimally controlled, leading to some loss of fuel and incomplete scavenging. The fresh charge may also be diluted by exhaust gases, reducing engine efficiency.

So, the statement "Crankcase scavenging arrangement is very economical and inefficient in operation" is True.