Why isn't a shock from static electricity, which can be thousands of volts, lethal?_____________________________________________________________________
What will be an ideal response?
Because the amount of current is limited.
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Technicians should be careful when brazing lines to evaporator coils that have pre-installed thermostatic expansion valves because the heat from brazing the lines:
A) Can overheat the TEV bulb and destroy the valve. B) Alter the chemical makeup of the bulb charge and change its physical properties. C) Can weld the sensing bulb to the suction line. D) Can catch the refrigerant on fire.
A model code has ____.
A. to be created by the local government B. no authority on its own C. to be published by the ICC D. legal authority
Name a process used to make continuous shapes such as moldings, tubing, bars, angles, hose, weather stripping, films, and any product that has a constant cross-sectional shape.
What will be an ideal response?
NEMA’s usual service conditions include a frequency variation of not more than what percentage of the nameplate frequency?
a. 1% b. 5% c. 15% d. 20%