Question

At light loads, the running of the engine is not very smooth because of the __________ dilution of charge.

(a) decreased

(b) increased

(c) equal

(d) none of the mentioned

I had been asked this question in quiz.

I'm obligated to ask this question of Disadvantages of Two Stroke Engines in division Two Stroke Engines of IC Engine

Answer 1

Answer: (b) increased

Explanation:

At light loads, two-stroke engines tend to have an increased dilution of the charge. This happens because of the incomplete scavenging process, which leads to some exhaust gases mixing with the fresh intake charge. The dilution results in a less efficient combustion process, reducing the engine's performance and smoothness. This is one of the reasons why two-stroke engines can run rougher at lower loads compared to their performance at higher loads, where the engine operates at a more consistent and optimal level.

Thus, the correct answer is (b) increased.