The run of a piping offset that has a travel of 12 inches and an angle of 22-1/2 degrees is _____ inches. (Refer to the figure above.)
a. 3.4
b. 4.9
c. 7.8
d. 11.1
d. 11.1
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Human factors engineering, or ____________________, the term more commonly used in Europe, is the design of products, as well as of working and living space, to fit the needs of humans.
Fill in the blank(s) with the appropriate word(s).
What is the opposite of photosynthesis?
A) Transpiration B) Evaporation C) Respiration D) Propagation
What type of systems normally use crankcase pressure regulators?
A) Commercial refrigeration applications with evaporator temperatures above 40°F B) Low-temperature refrigeration applications such as walk-in and reach-in freezers C) Primarily comfort cooling applications D) Any refrigeration system with a compressor that has a positive-pressure oil pump
?What gas from the flame can protect the molten weld metal from oxidizing?
A. ?C2H2 B. ?O2 C. ?CO2 D. ?NO2