What does PWHT stand for?
a. Pre-Weld Hardness Test
b. Post-Weld Hardness Test
c. Post-Weld Heat Treat
d. None of the above
c. Post-Weld Heat Treat
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____________ fixtures are desirable where large numbers of transient people might be present or where the building occupants might be mentally incompetent or antisocial.
a. Vandal-resistant b. Porcelain c. Vitreous china d. Medical
Oxygen, carbon, and ____ are gases exchanged in soil
a. helium b. lithium c. nitrogen d. calcium
Comfort can be described as the gentle balance between ____.
A. air cleanliness, air movement, temperature, and humidity B. air velocity, air cleanliness, humidity, and air movement C. air speed, air velocity, temperature, and humidity D. acceleration, air cleanliness, filtration, and humidity
The refrigerant in a condenser in a refrigeration system ____.
A. absorbs heat B. gives up heat C. changes to a vapor D. is under lower pressure than the evaporator