The main advantage of measuring airflow using the temperature rise method is that temperature rise measurements:
A) Can be taken easily using a common thermometer.
B) Require no calculation.
C) Work well in both the heating and cooling cycles.
D) Are more accurate than measurements taken with a flow hood.
A
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?Auto darkening welding helmets can be a tremendous help for new welders since they let you see where your electrode is and darken for welding within _____________ of a second.
Fill in the blank(s) with the appropriate word(s).
Humidity in the air represents heat that makes humans uncomfortable in hot weather. What causes this heat factor present in humidity?
A) Sunlight B) Hot air coming down from the attic C) Latent heat in the water vapor D) Lack of proper airflow
The primary technical standard for the design, construction, and operation of personnel lift platforms is _____.
a. OSHA 1926.1408 b. ASME B30.23 c. OSHA 1926.1417 d. ASME B30.5
Nitrogen changes from a liquid to a vapor at ____.
A. 212°F B. -21°F C. -320°F D. -479°F