To insure accurate testing, the best material to use for connecting lines to the vacuum pump and gauge set is ____.
A) light flexible hose
B) heavy duty rubber gauge line
C) copper tube
D) garden hose

Question

Quizplus · Accepted Answer

Copper tube is the best material to use for connecting lines to the vacuum pump and gauge set as it provides a secure and leak-free connection, and is not affected by the vacuum pressure. Light flexible hose and garden hose are not recommended as they can collapse under high vacuum pressure and contaminate the system. Heavy duty rubber gauge line is a suitable alternative, but may not provide as secure a connection as copper tubing.

To Insure Accurate Testing, the Best Material to Use for Connecting