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2.8 Questions for self-study
Instructions: Choose the one answer you believe is correct. Answers to questions
are in Appendix F.
2-1 Which of these is a closed loop?
a)
The water storage loop of a glycol-based solar system
b)
A recirculating domestic hot water system
c)
A draindown system's collector loop
d)
A collector loop filled with synthetic oil
2-2 Which of these is used to stop reverse thermosiphoning in the collector loop?
a)
A pump
b)
A backflow preventer
c)
A check valve
d)
An expansion tank
2-3 Which one of these systems uses an expansion tank in the collector loop?
a)
A
closed-loop system
b)
A
drainback system
c)
A
draindown system
d)
A
pool heating system
2-4 Which one of these systems uses a collector loop control valve in the collector
loop?
a)
A
closed-loop system
b)
A
drainback system
c)
A
draindown system
d)
A
pool heating system
2-5 The "greenhouse effect" describes which characteristic of glass?
a)
It
reflects most of the short and long wave radiation
b)
It
lets short wave radiation through better than long wave
c)
It
allows light through, but not heat
d)
It
only allows radiation good for plant growth through
OPERATION
58
2.8 QUESTIONS FOR SELF-STUDY





 


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