Proper height above the roof is important when installing a heat pump rooftop unit
A) to allow the condenser to take advantage of local prevailing wind
B) so that the unit can be serviced from underneath
C) to insure adequate combustion air to the burners
D) so that snow does not block airflow through the outdoor coil
D
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Block sizes are expressed as _____ sizes, which means that each dimension includes the mortar joint.
A. sectional B. dimensional C. nominal D. architectural
While having a discussion, Technician A says that bushings should always be lubricated. Technician B says that bushings should not be lubricated. Lubricants attract dirt and can sometimes damage the bushing material. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B
At a large number of universities, the departments that teach courses such as chemistry, biology, and zoology are housed in the College of _____________________
Fill in the blank(s) with correct word
For one of the substances in Table 3.2, compute the change in volume and work done when one kilogram of the substance is compressed from 1 bar to 100 bar at a constant temperature of 20°C.
Table 3.2 provides the specific volume, isothermal compressibility, and volume expansivity of several liquids at 20°C and 1 bar25, where ? and ? may be assumed constant.
