Question

technician a says that air should be injected into the exhaust manifold at all times. technician b says that air should not be injected into the exhaust manifold at all times. who is correct? a. technician a b. technician b c. both technician a and technician b d. neither technician a nor technician b

Explanation:

Step1: Analyze Technician A's statement

Air injection into the exhaust manifold is not needed at all times. For example, during warm - up, it may be beneficial for emissions, but in other conditions (like when the catalytic converter is hot and efficient), continuous injection is not necessary. So Technician A is wrong.

Step2: Analyze Technician B's statement

Since air injection is not required at all times (as explained above), Technician B's statement that air should not be injected into the exhaust manifold at all times is correct.

Answer:

b. Technician B