?What is the recommended minimum spacing when two outdoor air-to-water heat pumps are installed with their air intake sides facing each other?

A. ?18 inches
B. ?2 feet
C. ?4 feet
D. ?6 feet


Answer: B

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Steel pipe with welded or threaded connections and fittings is used in heavy construction.

Answer the following statement true (T) or false (F)

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Welds with only slight oxide layers are better for multiple passes.

Answer the following statement true (T) or false (F)

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Technician A says some manufacturers recommend head bolts going into a coolant passage be sealed with liquid thread sealant. Technician B says RTV stands for right torque value. Who is correct?

A. Technician A B. Technician B C. Both technicians D. Neither technician

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____________________ on heating appliances are basically thermostats that open when an unsafe condition exists in the furnace, such as high furnace temperatures.

Fill in the blank(s) with the appropriate word(s).

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