Technician A says that although most technicians stir paint, the step is not that important and could be skipped. Technician B says that once paint and solvents are mixed together, they cannot be separated again. Who is correct?
A. Technician A only
B. Technician B only
C. Both Technicians A and B
D. Neither Technician A nor B
A. Technician A only
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Which of the following refrigerant piping techniques help to get oil to flow up a riser in a suction line?
a. Selecting a line size that results in a very low velocity. b. Selecting a line size that is one or two sizes larger than the rest of the line. c. Installing a trap at the bottom of the riser. d. Installing a liquid-to-suction heat exchanger.
The grade of fuel oil most commonly used in residential oil fired furnaces is
A) Number 1 B) Number 5 C) Number 2 D) Number 6
Technician A says sulfur dioxide is one of the key elements causing acid rain. Technician B says a marine environment commonly results in an accelerated oxidation process. Who is correct?
A. Technician A only B. Technician B only C. Both Technicians A and B D. Neither Technician A nor B
Which of the following is the amount of water vapor in the air, measured by weight in grains?
a. convection b. enthalpy c. condensation d. humidity