Large pressurized cylinders on air-conditioning systems that hold more than 15 psig internal pressure must be rated by:
A) The Environmental Protection Agency, EPA.
B) The American Society of Mechanical Engineers, ASME.
C) The Department of Transportation, DOT.
D) The American Society of Heating, Refrigeration, and Air Conditioning Engineers, ASHRAE.
B
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Signals from a signal person are typically communicated to the crane operator using hand signals or _____.
a. voice b. signs c. colored flags d. horn blasts
Garnet is used as an abrasive in many cutting systems
Indicate whether the statement is true or false
Which statement is correct regarding the cleaning of base metals before welding?
a. All metals should be cleaned before welding. b. It is not necessary to clean new metal. c. Metals only need to be cleaned if they show signs of corrosion. d. Metals only need to be cleaned if they are painted or coated.
In a parallel circuit, the total resistance is _____ value resistor.
A. larger than the lowest B. less than the lowest C. equal to the largest D. equal to the lowest