A maintenance technician who must know all aspects of a machine is known as a(n) ____.
A. electrician
B. mechanic
C. specialist
D. multicraft technician
Answer: D
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Alternating current is typically available in:
A) Unphased, positive phased, and negative phased. B) Single phase and two phase. C) Single phase, two phase, and three phase. D) Single phase and three phase.
When an evaporator float switch is used in the drain pan of an air conditioner or heat pump, if the drain pan fills up the float will interrupt the low voltage circuit to:
A) The condensate pump. B) The compressor contactor. C) The fan relay. D) The gas valve.
The crankcase heater protects the compressor on startup by:
A) Providing an extra heat source, making the compressor's job easier. B) Keeping the oil warm so that it does not become too thick to lubricate properly. C) Drying out any water in the oil. D) Vaporizing any liquid refrigerant that may enter the compressor during the OFF-cycle.
The water table is _____
a. a document identifying all water sources on the job site b. a sump where groundwater is collected for pumping c. the elevation at which groundwater is encountered d. an aid to calculating the water percentage in concrete