Advanced Placement (AP) College

1. The Riseaux family is building a two-story home in northern Arizona on a large amount of acreage.
Which type of thermal storage system would likely best suit their needs?
A. Underfloor
B. Geothermal
C. Hydronic
D. Ceramic
2. A very good insulator has an R-value of 29. The material's heat transfer coefficient is
A. 0.034.
B. 8.497.
C. 14.5.
D. 29.
3. Which of the following is a factor that reduces the required number of kWh for heating?
A. Cooling systems on machinery operated in the space
B. Lower use of electrical equipment
C. Greater number of people occupying the space
D. Lower lighting levels
4. Using the degree day method, calculate the annual kWh use in Springfield, IL, with a heat loss of 12
kWh, an indoor design temperature of 70°F, and assuming a 24 hour per day occupancy.
A. 25,080
B. 23,512
C. 34,466
D. 18,810
5. The Vanelli family is building a house and wants to save money anywhere they can. Which of the
following choices would be the most expensive electric system for them to operate?
A. Heat pump
B. Baseboard
C. Radiant ceiling
D. Program clock
6. In a building with 10,000 cubic feet where the air changes every two hours, what's the rate of air
change?
A. 133.3 cfm
B. 167.7 cfm
C. 83.3 cfm
D. 50 cfm
7. Of the following, which is true of radiant heat?
A. A normal thermostat can be used.
B. Radiant heat can be used as a central system only.
C. Lower temperature settings can be used with the same comfort level.
D. Radiant heat is no longer considered a safe heating system.
8. Which of the following types of heating systems is often installed with a humidistat to improve fresh air
exchange?
A. Panel heater
B. Radiant ceiling cable
C. Hydronic heating system
D. Resistance baseboard
9. Eve's contractor recommended she not install baseboard heating. In which scenario would it be
disadvantageous to install a baseboard heating system?
A. Where electricity is generated from a gas-fired plant
B. Where there are low ceiling heights
C. Where the TD is zero
D. Where there is high room air circulation
10. Electric resistance heaters have low thermal mass, which means that
A. they're lightweight for the amount of heat energy released.
B. switching must be fast to avoid large temperature swings.
C. they retain heat well.
D. they're energy-efficient.
11. Eric is doing measurements to build a quote for a residential heating system installation. He's discovered
amount x of heat loss from ventilation and amount y from infiltration. What number should he use for his
calculations?
A. Whichever is greater, x or y
B. The average of x and y
C. The sum of x and y
D. The difference between x and y
12. Heating units that depend on the natural circulation of air in the space to be heated are called
A. electric baseboard heaters.
B. unit ventilators.
C. heat pumps.
D. hot water storage heaters.
13. Using a heater to reduce humidity during the cooling season is called
A. dry heating.
B. humidification.
C. terminal reheat.
D. hydronic reduction.
14. Which of the following controls can automatically reduce heating levels when the building is unoccupied
for periods of time and heat isn't needed?
A. Program clock
B. Damper control
C. Thermostat with bimetallic element
D. Sensing element
15. A circuit with a resistance of 25 ohms is carrying a load of 2 amps. How much heat (in watts) is
developed?
A. 450
B. 50
C. 1,250
D. 100
16. Erwin is the contractor on a single-floor residence on a large concrete slab. Which is the best thermal
storage option for him in this installation?
A. Hydronic
B. Underfloor
C. Ceramic
D. Conduction
17. If the base temperature is 65 degrees and the mean is 50, what's the DD?
A. 11
B. 57.5
C. 115
D. 15
18. What's the most expensive source of energy per Btu?
A. Oil
B. Solar
C. Electric
D. Gas
End of exam
19. What is the R-value of an air space?
A. 1
B. .0028
C. .91
D. Essentially zero
20. The Stratton family wants a heating system with no drafts, even heat, and no stratification of heat
between floor and ceiling. Which type should they install?
A. Radiant heating in floor slabs
B. Baseboards
C. Unit ventilators throughout the residence
D. A heat pump

Answers

Answer 1

A

this should be apparent with the heating input

Answer 2

The questions cover topics related to thermal storage systems, insulation, factors influencing heating requirements, heating system costs, air change rates, types of heating systems, and electrical concepts. The correct answers provide insights into efficient heating solutions, insulation properties, and considerations for heating system selection.

Let's go through each question:

1. Which type of thermal storage system would likely best suit their needs?

  - Correct Answer: B. Geothermal

2. A very good insulator has an R-value of 29. The material's heat transfer coefficient is

  - Correct Answer: A. 0.034

3. Which of the following is a factor that reduces the required number of kWh for heating?

  - Correct Answer: B. Lower use of electrical equipment

4. Using the degree day method, calculate the annual kWh use in Springfield, IL, with a heat loss of 12 kWh, an indoor design temperature of 70°F, and assuming a 24 hour per day occupancy.

  - Correct Answer: B. 23,512

5. The Vanelli family is building a house and wants to save money anywhere they can. Which of the following choices would be the most expensive electric system for them to operate?

  - Correct Answer: C. Radiant ceiling

6. In a building with 10,000 cubic feet where the air changes every two hours, what's the rate of air change?

  - Correct Answer: C. 83.3 cfm

7. Of the following, which is true of radiant heat?

  - Correct Answer: C. Lower temperature settings can be used with the same comfort level.

8. Which of the following types of heating systems is often installed with a humidistat to improve fresh air exchange?

  - Correct Answer: C. Hydronic heating system

9. Eve's contractor recommended she not install baseboard heating. In which scenario would it be disadvantageous to install a baseboard heating system?

  - Correct Answer: D. Where there is high room air circulation

10. Electric resistance heaters have low thermal mass, which means that

  - Correct Answer: A. they're lightweight for the amount of heat energy released.

11. Eric is doing measurements to build a quote for a residential heating system installation. He's discovered amount x of heat loss from ventilation and amount y from infiltration. What number should he use for his calculations?

   - Correct Answer: C. The sum of x and y

12. Heating units that depend on the natural circulation of air in the space to be heated are called

   - Correct Answer: A. electric baseboard heaters.

13. Using a heater to reduce humidity during the cooling season is called

   - Correct Answer: A. dry heating.

14. Which of the following controls can automatically reduce heating levels when the building is unoccupied for periods of time and heat isn't needed?

   - Correct Answer: A. Program clock

15. A circuit with a resistance of 25 ohms is carrying a load of 2 amps. How much heat (in watts) is developed?

   - Correct Answer: A. 450

16. Erwin is the contractor on a single-floor residence on a large concrete slab. Which is the best thermal storage option for him in this installation?

   - Correct Answer: B. Underfloor

17. If the base temperature is 65 degrees and the mean is 50, what's the DD?

   - Correct Answer: D. 15

18. What's the most expensive source of energy per Btu?

   - Correct Answer: C. Electric

19. What is the R-value of an air space?

   - Correct Answer: D. Essentially zero

20. The Stratton family wants a heating system with no drafts, even heat, and no stratification of heat between floor and ceiling. Which type should they install?

   - Correct Answer: A. Radiant heating in floor slabs

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