The pipe installed to ventilate the building drainage system and to prevent drawing liquid out of traps and stopping back pressure.
What will be an ideal response?
vent pipe
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Is a steel deck made of cold-formed steel or structural steel?
What will be an ideal response?
The packaged unit accessory used to prevent compressor oil from absorbing refrigerant is a(n) _____
a. economizer b. crankcase heater c. oil defroster d. outdoor thermostat
The Electrostatic printing process is the same as th eprocess used in the Diazo copier.
Answer the following statement true (T) or false (F)
When the emergency heat feature of a heat pump is activated, the usual effect on the heat pump is _____
a. only the supplemental heaters and the blower operate b. electric heaters operate if the compression heat is inadequate c. the compressor and electric heaters operate together d. the gas or oil furnace is disabled