Anhydrous ammonia is also known as refrigerant _____.
a. R-771
b. A-717
c. A-771
d. R-717
d. R-717
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Maximum force arrest on a full-body harness, which is used for the most severe free fall hazards, is __________ pounds.
Fill in the blank(s) with the appropriate word(s).
Which characteristic can be used to distinguish breeds of cattle?
a. Color pattern c. Country of origin b. Polled or horned d. All answers
All overhead valve engines ________
A) Use an overhead camshaft B) Use the camshaft to close the valves C) Have the valves located in the head D) Operate by the two-stroke cycle
Unlike other types of systems, geothermal systems do not lose capacity as the air temperature drops because:
A) They extract water from the ground, which is at a variable temperature. B) They extract heat from the ground, which is at a stable temperature. C) They extract air from the ground, which is at a variable temperature. D) They extract air from the ground, which is at a stable temperature.