During an operational check of an air-conditioning system, you should check the:
A) Temperature rise across the evaporator. B) Temperature drop across the condenser.
C) Oil on the lines or pipe insulation. D) Voltage drop on the power wire to the unit.
D
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The most important materials and resources concept is that of embodied energy
Indicate whether the statement is true or false
In an air-conditioning system using capillary tubes or a restrictor on the evaporator coil, if the head pressure increases 20 psig, the suction pressure will ____________________.
Fill in the blank(s) with the appropriate word(s).
¿Cuál no es un espesor típico de aislante de fibra de vidrio para tuberías?
a. 3/8 pulgada (0,95 cm) b. 1/2 pulgada (1,27 cm) c. 1 pulgada (2,54 cm) d. 1-1/2 pulgada (3,81 cm)
Match the signal person's hand signal with the desired crane operator action.
1) _____ Arm extended, thumb pointing down, and flexing the fingers in and out. 2) _____ Both arms extended, palms down, arms moving rapidly back and forth horizontally. 3) _____ Arm extended, fingers closed, thumb pointing downward. 4) _____ Forearm vertical, forefinger pointing up, and hand moving in a small horizontal circle. 5) _____ Tapping the elbow with one hand. A. Lower the boom B. Lower the boom and raise the load C. Raise the load D. Emergency stop E. Use the whip line F. Extend the boom