Which of the following valve types is NOT approved for use in a gas system?
a. ball
b. gate
c. butterfly
d. plug
ANSWER: c
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Metal heat-circulating fireplaces have been in use for _____ .
A. over a century B. more than 50 years C. about 40 years D. less than 25 years
When the hydrogen required by a fuel cell is ‘reformed' from a gasoline source, what is the undesirable byproduct?
A. carbon B. static electricity C. depleted gasoline D. propane
Both linear programming and breakeven analysis require the use of computers
Indicate whether the statement is true or false.
What can cause odors or slime build-up in an ice machine?
A) Too many minerals in the water cause odor and slime build-up in an ice machine. B) Odor and slime build-up are caused by bacteria and fungi growth. C) Odor and slime build-up are caused by poor-quality water coming into the system. D) Cleaning the ice machine too often can cause odor and slime build-up.