Questions: Select the best answer for the question. 17. Technician A says that the piston's most important function is to transfer the force produced by the burning air-and-fuel mixture into usable power. Technician B says that the piston size is used to help form a seal between the piston and the cylinder walls. Who is right? A. Technician A only B. Both Technicians A and B C. Neither Technician A nor B D. Technician B only

The answer is A: Technician A only.

Explanation:

• Technician A is correct. The primary function of a piston in an internal combustion engine is to transfer the force produced by the combustion of the air-and-fuel mixture into mechanical power. This power is then used to turn the crankshaft and ultimately drive the vehicle.

• Technician B is incorrect. While the piston size and design do play a role in forming a seal with the cylinder walls, this is not the primary function of the piston. The seal is primarily achieved through the use of piston rings, which are designed to prevent the escape of combustion gases and maintain compression.

Therefore, only Technician A is correct in this context.