When a zone thermostat fan control switch is moved from Auto to On, what should happen?
a. All system dampers open and the blower starts.
b. The zone damper for each zone set to On opens and the blower starts.
c. The zone damper for that zone closes, all the others open, and the blower starts.
d. The zone damper remains open at all times, regardless of the system operating conditions
b
You might also like to view...
The National Organic Standards Board (NOSB) is composed of representatives from what seven categories?
What will be an ideal response?
Answer the following statement(s) true (T) or false (F)
1.Type NM cable is considered to be supported when it passes horizontally through bored or punched holes in framing members that are no more than 4-1/2 feet apart. 2.When service entrance cable is used as a wiring method for branch circuits, the only conductor permitted to be bare is the equipment grounding conductor. 3.Service entrance cable with an uninsulated conductor (Type SEU) is permitted to be used as the branch circuit wiring method for an electric range. 4.A “homerun” may enter a loadcenter through knockouts in the back, sides, top, or bottom of the loadcenter.
Technician A says that leather shoes offer more protection than canvas shoes. Technician B says that steel toed boots are essential to protecting your feet from injury. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
A flow rate that is too high can cause an undesirable __________.
A. pressure B. heat C. both a and b D. none of the above