What is the minimum desired return water temperature for a gas-fired boiler?
A) At least 100°F returning to the boiler B) At least 140°F returning to the boiler
C) At least 80°F returning to the boiler D) At least 180°F returning to the boiler
B
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When the heat load on the evaporator increases, the automatic expansion valve:
A) Opens to feed more refrigerant. B) Closes to keep the pressure from increasing. C) Sends a signal to the electronic control board indicating the change. D) Does nothing because AEVs are not modulating devices.
What procedure would you use if you wanted to repair the main liquid line solenoid valve and replace the filter drier without removing the entire refrigerant charge?
A. Compressor pump down B. Discharge valve pump down C. Low side pump down D. A parcel rack pump down
When the reference arrow method is used, a viewing arrow with a view identification letter points to the location from where the view is taken. The auxiliary view is then placed in any desired location on the sheet and in the same orientation as the reference arrow. The view identification letter is placed above the auxiliary view.
Answer the following statement true (T) or false (F)
Pollen is usually taken from one plant to another by ____________________
Fill in the blank(s) with correct word