Chapter Tests
and Problems
ChaPTer 23 heaTing, VenTilaTing,
and air-CondiTioning (hVaC),
and PaTTern deVeloPmenT TeST
INSTRUCTIONS
Answer the questions with short, complete statements or draw–
ings as needed.
QUESTIONS
Part 1: HVAC Drafting
1. HVAC systems are also commonly known as ____ systems.
2. What is the general purpose of an HVAC system?
3. Under what general conditions is ventilation required?
4. Define duct.
5. Name two types of forced-air systems.
6. What is the basic principle of refrigeration?
7. Name two types of hot water systems.
8. How does a zoned control system differ from a central
forced-air system?
9. Describe the basic function of a heat pump system.
10. Identify six sources of pollutants in a structure.
11. Describe the basic function of an air-to-air heat exchanger.
12. Defi ne thermostat.
13. List three factors that contribute to the proper placement of
a thermostat.
14. Name two types of HVAC plans (based on line technique).
15. What are detail drawings used for in HVAC drafting?
16. What are section drawings used for in HVAC drafting?
17. Describe two types of sectioning practices used in HVAC
drafting.
18. When are pictorial drawings used in HVAC drafting?
19. Describe HVAC schedules and their importance.
20. How are schedules keyed to the HVAC plan?
Part 2: Pattern Development
21. Describe the basic principle of pattern development.
22. What is the key to pattern development?
23. Define stretch-out line.
24. Name and sketch four types of seams.
25. Name and sketch three types of hemmed edges.
26. Define truncated.
27. A transition piece is also known as a __________________.
28. Why is it important to have a working knowledge of descrip-
tive geometry for pattern development?
29. Define triangulation.
30. Briefl y describe how sheet metal patterns can be created on
a CADD system and have the information transferred to a
flat pattern or directly to manufacturing.
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Chapter 23
Heating, Ventilating, and Air-Conditioning (HVAC), and Pattern Development
Answers to End-of-Chapter Test Questions
Part 1: HVAC Drafting
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