Why is a pressure regulator necessary when using nitrogen cylinders?
A) To boost the pressure leaving the nitrogen cylinder high enough to be used
B) Because the nitrogen must be carefully controlled since it is toxic
C) Because the nitrogen is extremely expensive and must be carefully rationed
D) To reduce the pressure in the nitrogen cylinder to a safe level
D
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A. snap-disc B. mercury-filled tube and diaphragm C. thermistor D. Bourdon tube
When setting up triangles, it is best to walk well off the road and hold the triangle _____ so that approaching traffic can see it.
Fill in the blank(s) with the appropriate word(s).
Members of the joints to be welded may be formed to a particular shape in preparation for the weld to increase the ____ of the joint.
A. strength B. durability C. longevity D. worth
Air storage tanks are used for what
a. Air storage tanks are used to hold freon. b. Air storage tanks are used to hold moisturized air. c. Air storage tanks are used to hold regular air. d. Air storage tanks are used to hold compressd air.