Which of the following is true with regard to circuit breaker interrupting capacity ratings?

a. NEMA tests are certified by unbiased reviewers.
b. UL tests now include NEMA ratings.
c. The interrupting capacity of a circuit breaker is the same for all voltage levels.
d. UL tests are self-certification.


b. UL tests now include NEMA ratings.

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``Timely,'' as the term relates to control, means

a. as soon as possible. b. at least monthly. c. as needed. d. within twenty-four hours, as a general rule. e. every six months.

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Which bias circuit forces the gate to a positive voltage?

A) self-bias B) voltage divider C) gate-bias D) source-bias

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Which color of orifice tube will allow the most refrigerant to pass through it?

A. Red B. Orange C. Green D. Brown

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If two or more inductors are connected in parallel (with no interaction of their magnetic fields) the total inductance is found by using the formula ____.

A. LT = L1 + L2 + L3 ... + Ln B. LT = L1 = L2 = L3 ... = Ln C. LT = L1 * L2 * L3 ... * Ln D. 1/LT = 1/L1 + 1/L2 + 1/L3 ... + 1/Ln

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