Arch 463
ECS
Final

Fall 2000

40 Multiple Choice Questions

1. The fundamental formula for conductive heat gain

A. is HG = U•A•D T
B. takes into account internal gains
C. assumes that it’s warmer inside than outside
D. all of the above

2. Passive cooling strategies such as ventilation, shading, and daylighting, are primarily concerned with removing

A. latent heat
B. sensible heat
C. entropy
D. all of the above

3. A source of latent heat in a building is

A. the electric lighting
B. the occupants
C. conductive heat gain
D. all of the above

4. Raising the temperature of air at 45°F and 30% RH, below the comfort zone on a bioclimatic chart, to 72°F

A. may make it too dry for comfort
B. may make it too humid for comfort
C. assures you that it will plot in the comfort zone
D. none of the above

5. Simply heating or cooling air follows the psychrometric chart’s

A. vertical air temperature lines
B. diagonal wet bulb temperature lines
C. horizontal humidity ratio lines
D. relative humidity curves

6. A mechanical cooling system is sized by calculating the building’s cooling load

A. for peak occupancy and the summer design temperature
B. for August
C. for the summer
D. for the cooling season

7. A 200-ton compression cooling system delivers

A. about 400,000 pounds of cooling
B. about 2,400,000 btuh of cooling
C. about 200 btu/pound (of dry air) of cooling
D. an undeterminate amount of cooling

8. The dew point temperature of air a 70°F DB and 65°F WB is

A. 70°F
B. 65°F
C. 62°F
D. 53°F

9. A compression cooling system draws heat from the environment by

A. compressing a gas
B. decompressing a gas
C. condensing a gas
D. all of the above

10. An absorption cooling system is complex because

A. it must use solar energy
B. it must maintain equilibrium to operate effectively
C. it has no moving parts
D. all of the above

11. A ground-coupled heat pump is more efficient than a conventional compression cooling system because

A. it can both heat and cool
B. it operates under less extreme temperature differences
C. it uses water instead of coolant as the heat transfer medium
D. there’s no difference—it’s exactly the same machine

12. An absorption chiller would be a better choice than a compression chiller

A. for an extremely hot cooling climate
B. for an extremely humid cooling climate
C. for a very large building
D. none of the above

13. HVAC systems provide

A. heating
B. ventilation
C. air-conditioning
D. all of the above

14. The HVAC system capable of providing comfort to all spaces in a mixed-use building is

A. a multi-sense system
B. a four-pipe system
C. a dual duct system
D. all of the above

15. The most economical and appropriate system for heating a ‘big box’ store is

A. a direct expansion (DX) system
B. a variable volume (VAV) system
C. a three-pipe system
D. any of the above

16. All-water HVAC systems are superior to all-air systems in

A. their control of indoor air quality
B. lower first cost and maintenance costs
C. reduced spatial requirements for thermal energy distribution
D. all of the above

17. HVAC systems with central control of fresh air, can save energy by using

A. an economizer cycle
B. an air-to-air heat exchanger
C. an energy wheel
D. all of the above

18. The cooling tower for a mid-rise office building could be effectively

A. located in a fountain
B. located on the roof
C. replaced by a ground coil or a lake coil
D. all of the above

19. Frank Lloyd Wright’s 1905 Larkin Building in Buffalo, New York, featured

A. ductwork integrated in vertical circulation cores
B. horizontal ductwork in fabric structures
C. a mechanical floor integrated with the lateral bracing
D. all of the above

20. An intelligent building can include

A. advanced technology for systems control
B. window systems designed for ventilation and daylighting
C. workstations with individual HVAC controls
D. all of the above

21. A building that serves as an example of today’s emerging sustainable architecture is

A. Richard Meier’s Gagosian Gallery
B. Frank Lloyd Wright’s Solar Hemicycle (Jacobs II)
C. Dougherty + Dougherty’s Center for Regenerative Studies
D. all of the above

22. The thermal mechanism that cannot help a person lose heat in a hot environment is

A. conduction/convection
B. evaporation
C. metabolism
D. all of the above

23. Your passive solar building can provide daytime comfort to its occupants when it’s 55ºF

A. if it contains thermal mass
B. if the building admits sun and blocks wind
C. if it has super-insulated walls
D. none of the above

24. A building that has a balance point temperature of 25ºF

A. requires heating when it’s 45ºF
B. requires cooling when it’s 20ºF
C. requires neither heating nor cooling when it’s 25ºF
D. all of the above

25. Vernacular architecture offers examples of appropriate thermal responses to its specific regional climate because

A. it depends on local materials
B. it’s derived from centuries of passed-down knowledge
C. it’s based on providing comfortable human shelter without mechanical heating and cooling systems
D. all of the above

26. Climate-responsive architecture that is dominated by barriers is most appropriate to

A. alpine climates
B. temperate climates
C. hot-arid climates
D. hot-humid climates

27. A site located at the base of a hill will have a microclimate that is

A. drier than nearby sites
B. cooler than nearby sites
C. more temperate than nearby sites
D. windier than nearby sites

28. An internal load dominated building in Los Angeles that features a north-facing glass curtain wall requires

A. an exterior horizontal shading device
B. exterior vertical shading devices
C. an exterior egg-crate shading device
D. no shading device

29. You can analyze the effectiveness of an external shading device by using

A. LOF’s Sun Angle Calculator
B. Solar-2 software
C. Suntect software
D. all of the above

30. A passive solar heating system that requires no thermal mass for daytime heating is

A. direct gain
B. a Trombe wall
C. a skytherm (roof pond)
D. isolated gain (thermosiphon)

31. The use of thermal mass is an effective passive cooling strategy

A. when it is ventilated at night
B. when it can be exposed to the night sky and protected from the sun
C. when it is enclosed in the insulated skin of the building
D. all of the above

32. Cross-ventilation in a hot-humid climate will

A. increase enthalpy in a building
B. remove humidity from a building
C. cool the indoor air to several degrees below outside air temperature
D. none of the above

33. An earth-tube provides passive cooling by

A. using earth-contact to remove heat from ventilation air
B. removing latent heat from ventilation air
C. providing stack ventilation
D. all of the above

34. A finish material that can act as effective thermal mass is

A. cedar siding in a sauna
B. a green marble countertop
C. exterior brick veneer siding
D. all of the above

35. In a large office building an effective passive cooling strategy is

A. exterior shading
B. daylighting
C. thermal mass with night ventilation
D. all of the above

36. Using a small window in place of a large window can

A. save energy
B. provide framed views
C. provide privacy
D. all of the above

37. An active solar heating system can

A. provide seasonal storage of heat
B. provide heat for a swimming pool
C. supplement an HVAC system
D. all of the above

38. The vapor barrier in a wall filled with batt insulation should be designed to

A. keep cold moist outdoor air out of the insulation
B. keep warm moist indoor air out of the insulation
C. both of the above
D. none of the above

39. Super-insulated, double-wall construction is typified by

A. two layers of batt insulation
B. a radiant barrier
C. no need for a vapor barrier
D. none of the above

40. The heat gain through a 3’ x 5’ unshaded, blue-green, low-e window (SHGF=0.43) at 3 p.m. when the incident short wave solar radiation is 320 btuh/ft² is

A. 137.6 btuh
B. 182.4 btuh
C. 2064 btuh
D. 2736 btuh