Question

technician a says that a freewheeling engine has enough clearance between the pistons and the valves that they can never make contact. technician b says that an interference engine has pistons that will hit each other if the timing belt breaks. who is correct?

○ a. technician a

○ b. technician b

○ c. both technician a and technician b

○ d. neither technician a nor technician b

Explanation:

• For Technician A: A freewheeling (non - interference) engine has sufficient clearance between pistons and valves so they never contact, even if timing belt breaks. This statement is correct.
• For Technician B: An interference engine has pistons and valves that can collide (not pistons hitting each other) if timing belt breaks. So Technician B's statement is incorrect.

Answer:

a. Technician A