What pieces of information are necessary to use a manufacturer's gas manifold pressure chart?
A) Length of gas line and firing rate
B) The gas line length, number of burners, and firing rate
C) The altitude and gas heating value
D) The number of burners and furnace firing rate
C
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A fire wall divides a building into two parts in such a way that
A) the occupant load in each part is the same. B) the two parts behave as two separate buildings so that if one part burns down and collapses, the other part and the fire wall will remain intact. C) the two parts behave as two separate buildings so that if one part burns down and collapses along with the fire wall, the other part will remain intact. D) if the automatic sprinklers have been installed in one part, it is as if they have been installed in both parts. E) the aggregate area of each part is the same.
Throughout the third century, the Roman imperial system based on meritocracy gave way to
a. a democratic system resulting in popular rule. b. a period of peace and prosperity under the reigns of the “five good emperors.” c. a brief restoration of the Roman Republic and its ancient institutions. d. a monarchical system of military tyrants.
If the sale price of fed cattle is $70 cwt. and the cost of gain was $55 cwt., the feeding
margin is: A. positive. B. negative.
Which of these components is unique to the heat pump?
a. Compressor b. Defrost timer c. Condensing coil d. Evaporator coil