Refrigerant quantities in air-conditioning systems are often expressed in:
A) Grains, grams, or pounds.
B) Psig equivalency.
C) Ounces, decimal pounds, or pounds and ounces.
D) Fahrenheit degrees equivalency.
Question 2
How are staples used for fastening duct insulation different from normal staples?
A) The tips of the staple are bent outward as the staple goes through the fabric.
B) They are corrugated.
C) They bend inward to help secure the insulation to the duct.
D) They are stronger to pierce the sheet metal ductwork.
