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Indicate whether the statement is true or false.
1. An automatic backwash filter uses permanent stainless steel filter media.
a.
True
b.
False
2. The heating capacity of a water-to-water heat pump is highly dependent on the temperatures of the source and sink
fluids.
a.
True
b.
False
3. Air-to-water heat pump system designs can often be adapted for use with water-to-water heat pumps.
a.
True
b.
False
4. Buffer tank sizing depends on the acceptable temperature rise of buffer tank water during the time the heat pump is off.
a.
True
b.
False
5. Desuperheaters transfer more than 60 percent of the total thermal energy in the hot refrigerant gas leaving the
compressor to domestic hot water.
a.
True
b.
False
Indicate the answer choice that best completes the statement or answers the question.
6. What type of flow allows for better heat transfer between the tube wall and the loop fluid?
a.
laminar
b.
turbulent
c.
smooth
d.
stagnant
7. Which factor does NOT generally influence undisturbed soil temperature?
a.
depth
b.
time of year
c.
ground loop orientation (horizontal or vertical)
d.
thermal properties of the soil
8. What is the ground water temperature in most drilled wells?
a.
about equal to the average annual outside air temperature
b.
about equal to the average low summer air temperature
c.
about equal to the average high winter air temperature
d.
about 65 degrees F in most areas of North America
9. What performance characteristic determines whether fluid flow is laminar or turbulent?
a.
coefficient of performance
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b.
EER
c.
Reynolds number
d.
Poisson number
10. What is the minimum flow velocity necessary to consistently carry air and low-density particles along piping oriented
at an arbitrary angle?
a.
2 feet per second
b.
3 feet per second
c.
5 feet per second
d.
8 feet per second
11. What type of tubing coil is typically used with horizontal earth loop installations?
a.
slinky
b.
u-tube
c.
submersible
d.
manifold
12. What type of joining method is typically used with HDPE piping in an earth loop?
a.
no joining method is needed, since the tubing is fabricated in long single pieces
b.
press fitting
c.
mechanical coupling
d.
heat fusion welding
13. Which factor is strongly influenced by head loss in design of an earth loop system?
a.
minimum fluid temperature
b.
serial or parallel piping layout
c.
type of piping that may be used
d.
required circulator power
14. Which type of earth loop enables purging each circuit of a parallel, closed-loop system individually?
a.
loops that include an expansion tank
b.
loops that include a circulator
c.
non-valved systems
d.
valved systems
15. Besides HDPE, which material is commonly used in earth loop heat exchanger piping?
a.
PEX
b.
APEX
c.
stainless steel
d.
copper
16. Which is true of a submerged heat exchanger?
a.
It is used to extract heat from lakes and exchanges water directly with the lake.
b.
It is used to extract heat from lakes and does not exchange water directly with the lake.
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c.
It is used to extract heat from the ground as part of a pressurized system.
d.
It is used to extract heat from the ground as part of an unpressurized system.
17. What type of antifreeze solution is most widely used in geothermal heat pump applications?
a.
an alcohol-based solution
b.
a salt-based solution
c.
an inhibited propylene glycol solution
d.
a noble-gas-based solution
18. Which two issues must be examined whenever ground water is considered for use with a water-source heat pump?
a.
water quantity and average water pressure
b.
water quantity and water quality
c.
water quality and water hardness
d.
water acidity and average water pressure
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1. True
2. True
3. True
4. False
5. False
6. b
7. c
8. a
9. c
10. a
11. a
12. d
13. d
14. d
15. a
16. b
17. c
18. b