Many hot water systems eliminate the need for storage tanks by using _____.
a. backflow preventers
b. tankless heaters
c. water softeners
d. recirculating pumps
b. tankless heaters
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The piston system shown in the accompanying figure is an example of what type of drawing?
What will be an ideal response?
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Which type of system requires more pumping horsepower for the water: open loop or closed loop?
What will be an ideal response?
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Which refrigerant type experiences the largest temperature glide?
A. azeotropes B. near-azeotropes C. zeotropes D. binary refrigerant blends
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All complete statements in Perl end with a(n) ____.
A. colon B. semicolon C. comma D. asterisk
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