HVAC/R Theory

Question 0

How many BTU’s/lb does it take to:

• Heat water 1 degree F?
• Melt ice?
• Boil water?

Answer 0

• 1 BTU
• 144 BTU’s
• 970 BTU’S

Question 1

1 lb = how many grams?
1lb = how many oz?
1 Ton = how many lb?

Answer 1

• 454 g
• 16 oz
• 2000 lb

Question 2

What are the formulas to change Degrees C to Degrees F?

And Degrees F to Degrees C?

Answer 2

• C = (F- 32) / 1.8

- F = (C X 1.8) + 32

Question 3

Psig to Psia?

Answer 3

Psig + 14.7 = Psia

Question 4

Kpag to Kpaa?

Answer 4

Kpag + 101.3 = Kpaa

Question 5

Psig to Kpag?

Answer 5

Psig x 6.89 = Kpag

Question 6

Kpag to Psig?

Answer 6

Kpag \ 6.89 = Psig

Question 7

“Hg to Psia ?

Answer 7

14.7 - (“Hg \ 2.04) = Psia

Question 8

Psia to “Hg ?

Answer 8

(14.7 - Psia) x 2.04 = “Hg

Question 9

“Hg to Kpag ?

Answer 9

“Hg x 3.38 = Kpag

Question 10

F to C ?

Answer 10

(F-32) \ 1.8 = C

Question 11

C to F ?

Answer 11

(C x 1.8) + 32 = F

Question 12

C to K ?

Answer 12

C + 273 = K

Question 13

F to R ?

Answer 13

F + 460 = R

Question 14

R to K ?

Answer 14

R \ 1.8 = K

Question 15

K to R ?

Answer 15

K x 1.8 = R