A specially designed material that prevents leakage from the bonnet yet allows the hand wheel to turn evenly:
A) mechanical seals
B) segmental carbon rings
C) labyrinth seals
D) packing
Correct Answer:
Verified
Q28: Check valve design(s) include:
A) swing check
B) ball
Q29: A check valve responds to the following
Q30: Diaphragm valves are used primarily for:
A) corrosive
Q31: The seats in a gate valve fall
Q32: Diaphragm valves come in the following designs:
A)
Q34: The outlet is larger on a:
A) relief
Q35: A gate valve is closed by turning
Q36: Actuators come in three basic designs:
A) pneumatic,
Q37: The typical gate valve has all of
Q38: Electrical actuators come in all of the
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