Question

post - test
which of these should be done to protect a/c system parts?
a. drain the coolant.
b. cover open lines and connections with caps.
c. use an “s” hook to hang parts.
d. use locking pliers on metal a/c lines.

Explanation:

Draining coolant is for maintenance, hanging parts with "S" - hook and using locking pliers are not for protection of A/C system parts. Covering open lines and connections with caps prevents debris and contaminants from entering, protecting the system.

Answer:

B. Cover open lines and connections with caps.