Mechanical Engineering - IC Engines and Nuclear Power Plants - Discussion

The correct answer is option B.

Can anyone explain this?

The given answer is correct. I agree.

Option D is correct.

In this device, in addition to the main jet, a compensating jet is provided which is in communication with a compensating well. The compensating well is also vented to atmosphere (like the main float chamber); it is supplied with fuel from the main chamber through a restricting orifice.

As the air flow increases, the level of fuel in the compensating well decreases, thus reducing the fuel supply through the compensating jet. The compensating jet thus progressively makes the mixture leaner as the main jet progressively makes the mixture richer, the sum of the two remaining constants. The main jet and compensating jet reciprocals of each other.

Correct answer Is B.

Option A is correct because in suction cylinder move downward which cause the rotation of the crankshaft and the inlet valve of the air-fuel mixture and exhaust valve operator is connected with the crankshaft and function with the movement (rotation) of it so it stays constant.