Which of the examples below expresses the associative law of addition?
A) A + (B + C) = (A + B) + C B) ABC = A + B + C
C) A(BC) = (AB) + C D) A + (B + C) = A + (BC)
A
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Technician A says that instrument panel illumination may be controlled by a rheostat. Technician B says that instrument panel illumination may be controlled by pulse width modulation. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B
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Full-ported check valves installed in sewage systems to prevent backflow are called ___________.
a. RPZs b. atmospheric-type vacuum breakers c. double-check valve assemblies d. backwater valves
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If the resistance of a circuit is 25 ohms and the current is 10 amps, the power in watts is _____.
a. 250 b. 500 c. 1,500 d. 2,500
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A standard cord of wood converts to ____ cubic feet
A) 128 B) 144 C) 244 D) 48
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