What pressure relief device should be used in gas service?
A. Safety valves
B. Relief valves
C. Safety relief valves
D. Rupture discs
A. Correct. Safety valves are used in compressible fluid service (gas, steam) and are spring-loaded devices.
B. Incorrect. Relief valves are used in liquid (incompressible fluid) service to limit the pressure in a vessel or system.
C. Incorrect. Safety relief valves are spring-loaded pressure relief devices that may be used in either liquid or gas service.
D. Incorrect. Rupture discs are a one-time use device that remains open after operation and must be replaced following each use.
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Match each act below with the correct description. A. Sugar Act 1. first British law intended to raise revenues in the colonies B. Stamp Act 2. asserted Parliament's absolute power over the colonies C. Declaratory Act 3. required colonists to lodge British troops in their homes ? ? 4. generated the most protest in the colonies
A. A-3, B-2, C-l B. A-1, B-4, C-3 C. A-1, B-4, C-2 D. A-4, B-1, C-2 E. A-2, B-1, C-4
Who discovered a way to measure electrical currents?
A) James Watt B) Alessandro Volta C) Andre-Marie Ampere D) Georg Simon Ohm
When a body of water is not subject to tides, the electrical datum plane is a horizontal plane that is ____________________ mm higher than the normal water level.
Fill in the blank(s) with the appropriate word(s).
Which of these animals commonly produces several eggs at one time?
a. Pig c. Cow b. Horse d. All answers are correct.