A mineral-insulated cable is a type of _____.
a. self-regulating cable
b. parallel resistance heating cable
c. power-limiting cable
d. constant-wattage, series resistance heating cable
d. constant-wattage, series resistance heating cable
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?Technician A says that oil gallery plugs and heater-hose connections usually have NPT threads. Technician B says that a 3/8" to 1/4" socket adapter is used to remove oil gallery plugs. Who is right?
A. ?Technician A only B. ?Technician B only C. ?Both A and B D. ?Neither A nor B
The low-side gauge is called:
A) A compound gauge. B) A vacuum gauge. C) A cold gauge. D) A high-pressure gauge.
What size should the combustion air openings be for a room with an 80,000 BTU/hr input furnace and a 35,000 BTU/hr water heater if the openings are opening directly into a ventilated attic and a ventilated crawlspace?
A) The size is irrelevant so long as there are combustion air vents. B) 115,000/1,000 = 115 sq in free area each C) 115,000/2,000 = 57.5 sq in free area each D) 115,000/4,000 = 28.75 sq in free area each
A pneumatic drill is commonly used _____
a. in areas where noise is a problem b. to supply compressed air to de-burr pipes c. when there is no source of electricity d. for intricate detail wor