The ____ provides the pressure difference needed to force the air into the duct system, through the heat-transfer surfaces in the conditioning equipment, through the grilles and registers, and into the room.
A. blower
B. forcer
C. compressor
D. condenser
Answer: A
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Five kg of air traveling at 3.2 m/s possesses ________ joules of kinetic energy.?
A. ?8 B. ?16 C. ?25.6 D. ?51.2
Where there is a requirement to add a second grounding electrode, the two electrodes must be spaced at least _____.
a. 12' apart b. 10' apart c. 8' apart d. 6' apart
Technician A says that an engine's size is called displacement and represents the volume displaced or swept by all of the pistons in one cycle. Technician B says that engine power is expressed in horsepower and based on the amount of torque or twisting force the engine produces. Which technician is correct?
A) Technician A B) Technician B C) Both technicians D) Neither technician
A certain lighting job requires four incandescent fixtures, twelve direct fluorescent luminaries, and nine semidirect fluorescent luminaries. The incandescent fixtures cost $19 each; the direct luminaries cost $26 each; and the semidirect luminaries cost $31 each. Find the total cost of all the fixtures and luminaries.
Fill in the blank(s) with the appropriate word(s).