Final Quiz - Need to Know Flashcards
1
Q
Two Type A1 refrigerants we use
A
R143a and R410a
2
Q
What is the waterside heat equation?
A
Q=500 x GPM x Delta T
3
Q
What is the airside heat equation?
A
Q = 1.08 x CFM x Delta T
4
Q
How do you find the shading coefficient?
A
SC = SG / 0.87
5
Q
How do you find the U value
A
U = 1 / R
6
Q
What is a U value?
A
A building materials ability to conduct heat
7
Q
What is an R value?
A
A building materials ability to resist heat
8
Q
Convert 1 ton to BTU/hr
A
12,000
9
Q
Convert 1 MBH to BTU/hr
A
1,000
10
Q
Convert 1 W to BTU/hr
A
3.412
11
Q
Convert 1 psi to ft.wg.
A
2.31
12
Q
Convert 1 hp to Btu/hr
A
2,545
13
Q
What is the equation for ACH/hr
A
CFM X 60 / room volume
14
Q
What are the affinity laws
A
flow can be translated to rpm.
15
Q
Typical office building
A
30K - 40K cfm
