Log In


Engine : Expired / Refrigeration AC - 213/252
Get a hint
« Previous Question
Refrigeration system isolation valves are specially designed with a back-seat, as well as a front-seat. For what purpose are these valves designed in this way?
A) allow for operation as a suction or discharge valve
B) allow for removal and replacement of the valve without shutting down
C) permit repacking the valve stem under pressure without shutting down
D) allow for operation as a liquid or vapor valve
loading answer...
Comments
There are no comments for this question.
0 0 0%

Study Mode
Answers Only
Options
Clear Score