Anaerobic decomposition of organic wastes in landfills results in the production of ________ gas which is often recovered and used
A) ethylene
B) ozone
C) methane
D) oxygen
E) all of the above
C
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What is the normal pressure range for compound pressure gauges made for use on R-410a systems?
A) 0 - 30" Hg vacuum and 0 - 120 psig pressure B) 0 - 500 psig pressure C) 0 - 30" Hg vacuum and 0 - 350 psig pressure D) 0 - 800 psig pressure
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Optical encoders are capable of measuring velocity.
Answer the following statement true (T) or false (F)
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What is the c-c of pipe K?
Fill in the blank(s) with the appropriate word(s).
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Which of the following valve types is NOT approved for use in a gas system?
a. ball b. gate c. butterfly d. plug
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