To manually defrost a frozen evaporator coil, technicians should:
A) Use any available sharp object to chip away ice from the coil.
B) Use a heat gun to accelerate the melting of the ice.
C) Chip away the ice from the coil using a tool designed for chipping ice.
D) Spray the ice with liquid refrigerant, which will boil and melt the ice.
B
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A ____________________ is a device (factory or field assembled) placed in the basic plumbing and piping system to perform a useful function in the system.
a. plumbing appurtenance b. fixture fitting c. plumbing appliance d. plumbing fixture
Which island in the Aegean Sea saw several unsuccessful Greek nationalist uprisings before finally becoming part of Greece after the Balkan Wars in 1913?
a. Rhodes b. Crete c. Cyprus d. Chios
In a single zone constant air volume system, the amount of air moving through the air handler
A) changes when the system switches from heating to cooling B) is proportional to the control signal C) stays the same all the time D) is varied to meet the building load
Starting circuits generally employ resistors of a higher wattage value than circuits that are intended for speed control.
Answer the following statement true (T) or false (F)