Mechanical Engineering - IC Engines and Nuclear Power Plants - Discussion

Answer A is correct.

Statement is: In a four stroke cycle, the minimum temperature INSIDE THE ENGINE CYLINDER.

Answer: At the end of exhaust the temperature of the cylinder is high. In the beginning of suction stroke the fresh air enters the cylinder (low temperature) and by the end of the suction stroke, the intake fresh air becomes hot (high temperature) why? Because it comes in contact with cylinder wall and gets warm and warm until the suction ends. Also by T-S diagram, it is clearly shown that minimum temperature is at the beginning of the suction stroke. So, the answer is option A.

A is correct one. As I have checked TS diagram.

Here asking about working fluid temperature, not cylinder temp. So, I think option 1 is correct.

In question, the temperature is within the cylinder. It should be at the end of suction.

A is the correct answer. Because, the question is given for minimum temp. If it is maximum temp then it option B is correct. Due to piston moves to TDC the pressure increase and temp also increase.

I think option A is correct. Because at the beginning of suction stroke air temperature is low. At the end of suction, air temp increase as the air will be in contact with hot cylinder.

Please tell me, which is the final answer?

I think B is correct because at the end of the suction stroke the volume increases so the air+ fuel expands.

I think the answer [B] is right. Because at beginning of suction stroke exhaust gases are just delivered and hence temperature must be high and as suction happens atmospheric air comes in contact with engine cylinder and temperature reach it lowest value.