The triac operates in a manner similar to that of two connected ____.

A. SCRs
B. resistors
C. ICs
D. capacitors


Answer: A

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Which of these is also known as electrical potential?

A) Ohms B) Amps C) Volts D) None of these

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A thermostatic expansion valve system operating with a refrigerant undercharge will have:

A) A high system subcooling. B) A low system subcooling. C) Higher-than-normal compressor amp draw. D) A low superheat.

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Trying out HPDs to determine how they fit with an individual’s anatomical features is known as what?