Two refrigerants exempted from the EPA requirement to recover, recycle, and reclaim are _____.

a. ammonia and carbon dioxide
b. ammonia and hydrogen sulfide
c. carbon dioxide and hydrogen sulfide
d. hydrogen sulfide and butane


a. ammonia and carbon dioxide

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Name the type of gears that have their teeth cut at an angle, which allows more than one tooth to be in contact, and carry more load than equivalent-sized spur gears and operate more quietly and smoothly.

What will be an ideal response?

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The initiation of metabolic processes in the seed occurs after germination

Indicate whether the statement is true or false

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All of the following chemicals are all considered hazardous waste EXCEPT ________

A) Old containers used to store used cleaning solvent B) New antifreeze C) Used ether-based cleaning solvents D) Cleaning solvent that has spilled onto the floor in the shop

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The IRC requires all habitable rooms to have a glazing area equal to ____ of the room's floor area and that half of the area used to provide light also be openable to provide ventilation.

A. 2% B. 8% C. 12% D. 20%

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