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air distribution

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1.
3 points
Air balancing is accomplished by measuring the air leaving each register.
2.
3 points
The duct system is pressurized by three pressures - which of the following determines pressure generated using the weight of the air?
3.
3 points
Forced air systems use the same room air over and over again.
4.
3 points
Pressure in the ductwork is measured in inches of water column (in. W.C)
5.
3 points
This fan can be very quiet when properly applied & can be used in very large high-pressure systems.
6.
3 points
This fan builds more pressure from the inlet to the outlet and has a forward curved blade and a cutoff to shear the air spinning around the fan wheel.
7.
3 points
This fan is used in the exhaust fan and condenser fan applications.
8.
3 points
Determine the cfm by using the formula: CFM = ?
9.
3 points
Air pressure in the ductwork is measured with a water manometer.
10.
3 points
We measure the velocity pressure of air moving in the duct to determine what?
11.
3 points
This fan will handle large volumes of air at low pressure differentials.
12.
3 points
Ther are various duct systems studied in class such as which of the following.
13.
3 points
The ___________ provides the pressure difference to force the air into the duct system, through the grilles and registers, and into the room.
(mutiple response)
14.
3 points
This is used with special manometers for checking duct pressure.
15.
3 points
The structure may have different cooling/heating requirements for air flow (CFM) to each room.
16.
3 points
Hot air ____ & cold air _______.
17.
3 points
Which type duct system is installed here in the classrom?
18.
3 points
Fresh air enters the structure by ___________ or by ______________ means.
19.
3 points
This instrument measures actual air velocity (how fast the air is actually moving in the duct)
20.
3 points
This fan is desirable for ductwork installations (evaporator fan).
21.
3 points
If we have a 3 ton A/C system installed - what would we normally expect the CFM fo the supply air system fan to be?
22.
3 points
These are used to spread & distribute the air throughout the space.
(mutiple response)
23.
3 points
This component has handles to be turned at an angle to the airstream to slow the air down.
24.
3 points
The return air duct is normally sized __________ than the supply duct system.
25.
3 points
What distributes air to the terminal units, registers, or diffusers in the conditioned space.
26.
3 points
Occupants should not be aware if the system is on or off.
27.
3 points
This fan makes noise and is used where noise is not a factor.
28.
3 points
What is used to balance the air in various parts of the system?
29.
3 points
The forced air system delivers the correct quantity of ______________ air to the occupied space
30.
3 points
This fan uses a venturi which forces airflow in a straight line from one side of the fan to the other.
31.
3 points
This duct system has the advantage of saving material and keeping the same pressure from one end of the duct system to the other.
32.
3 points
Static pressure is defined as the
33.
3 points
The components that make up the forced-air system are which of the following?
34.
3 points
Typically _____ cfm of air must be moved per minute per ton of air conditioning
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