Technician A says that forged steel trunk pistons expand and contract much less than comparable aluminum trunk pistons. Technician B says that forged steel trunk pistons are specified for diesel engines with lower peak cylinder pressures than those that use articulating pistons. Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct because forged steel pistons do indeed expand and contract less than aluminum pistons due to the material properties of steel. This makes them suitable for applications where tight clearances are crucial. Technician B is incorrect because diesel engines, especially those with high peak cylinder pressures, often use forged steel pistons due to their strength and durability, not the other way around.

Technician a Says That Forged Steel Trunk Pistons Expand and Contract