Charging by superheat is performed on systems that use a _____
a. fixed-orifice metering device
b. thermostatic expansion valve
c. sight glass
d. thermal-electric expansion valve
a
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If the floor of a steel-frame building has primary, secondary, and tertiary components, the tertiary components consist of
A) W-section beams. B) joist girders. C) steel joists. D) any one of the above. E) none of the above.
For ____ construction, the perimeter footings, interior turn-downs, slab thickness, and reinforcing steel should be designed for the minimum sizes required for the structure and soil conditions.
A. slab-on-grade B. piers C. crawl space D. pallet
Which of the following section numbers of the Clean Air Act apply to automotive air conditioning refrigerants?
A) 609 B) 311 C) 608 D) 409
In a semiconductor diode, the two bias conditions are ________
A) positive and negative B) open and closed C) blocking and non-blocking D) forward and reverse