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1. How many square inches in a square foot?

2. How many square feet in a square yard?

3. What is the cubical content of a room 12’ wide x 18’ long and the ceiling height is 9’?

4.. What is the formula for calculating the area of a circle?

5. What is the formula for calculating the perimeter of a circle?

6. What is the volume, in cubic feet, of a tank 3’ in diameter and 6’ height? 3’ diameter?

7. If a tank is 3’ in diameter and 6’ high and filled with water, how much would the water weigh in pounds?

8. How many gallons for the example above?

9. What is the formula for converting Fahrenheit to centigrade?

10. What is the formula for converting centigrade to Fahrenheit?

11. 1” = how many centimeters?

12. What is the decimal equivalent to 9/64? (4 spaces)

13. 1 Horsepower = __________? ft/lb/min.

14. .984375 is the decimal equivalent of what? _____

15. 1 cu. in of copper weights how much?

16. What is the average CFM for the following: 12,000 CFM, 15,000 CFM, 30,000 CFM?

17. Given the formula P = EI what would the P be if the E is equal to 120 and the I is equal to 2?

18. VA output = amps x secondary voltage. Given the amps of 0.8 and the secondary voltage of 24 what would the VA of the transformer be?

19. What is 10% of 20 amps?

20. How much heat is required to raise the temperature of 15.75 lbs of water 2.5 degrees?

Formula: W = weight x c specific heat of a substance x TD temperature difference

21. How much Latent Heat is added in Btu/h to the cooling load if 1,050 CFM of outside air is drawn into the air handler and the outdoor air temperature is 95 degrees. The humidity ratio of the outside air is 105 and the room 71.5? The formula for Latent Load = 0.7 x CFM x Humidity Ratio difference.

22. If 100,000 Btu/h furnace was required to heat a house with the temperature

difference between the inside and the outside being 70 degrees what would the CFM required be if you used the following formula?

CFM = Btu/h required

1.08 x TD (temperature difference)

23. One ton of cooling is equal to 12,000 Btu/h. How many Btu’s per minute?

24. How many Btu’s would (1) ton of cooling produce in one day?

25. Determine the heat loss for the following system:

Given: Return air temp as it leaves the heated space (73 degrees)

Return air temp as it enters the furnace in the garage (68 degrees)

Constant CFM of 1,300, continuous fan operation

What is the duct loss = CFM x 1.08 x TD =