Technicians should be careful when brazing lines to evaporator coils that have preinstalled thermostatic expansion valves because the heat from brazing the lines:
A) Alters the chemical makeup of the bulb charge and changes its physical properties.
B) Can catch the refrigerant on fire.
C) Can weld the sensing bulb to the suction line.
D) Can overheat the TEV bulb and destroy the valve.
D
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Fill in the blank(s) with the appropriate word(s).
In hot, humid climates, the vapor flow in conditioned buildings is generally from
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Indicate whether the statement is true or false
Before a steel plate is used for practice welding, mill scale on the plate is removed because the DCEN used in GTAW has little or no _____
A) electrical conductance B) flux resistance C) cleaning action D) arcing ability