Under NAC 624.540, which piping is within the Nevada C-37B Solar Space Heating scope?
Piping
Question · Easy
OSHA fall heights, to scale
Short
Which copper tube type is the usual choice for a pressurized glazed-collector hydronic space-heating loop under the 2018 UPC materials rules?
Per 2018 UPC Table 313.3, horizontal copper or copper-alloy tubing 1-1/2 inches and smaller in a solar space-heating loop shall be supported at intervals not exceeding:
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Per 2018 UPC Table 313.3, horizontal PEX tubing 1 inch and smaller used in a hydronic radiant floor shall be supported at least every:
In a drainback solar space-heating collector loop, supply and return piping must be pitched so the collectors empty when the pump stops. The FSEC solar manual practice slope is at least:
Six feet: a hard-hat anthem
Outdoor collector-loop piping on a C-37B hydronic space-heating system should be insulated primarily to:
When copper collector-loop tubing is joined to galvanized steel tank fittings, the 2018 UPC requires which fitting?
Per 2018 UPC Table 313.3, horizontal threaded or welded steel pipe 1 inch and larger used as a hydronic space-heating header shall be supported at intervals not exceeding:
Question · Medium
Why is CPVC generally unacceptable as the outdoor glazed-collector loop on a C-37B space-heating system?
Which joining method is appropriate for Type L copper in a high-temperature solar collector space-heating loop?
Per 2018 UPC Section 312.6, water piping installed in an exterior wall or other location subject to freezing shall be:
Where copper or PEX hydronic tubing passes through wood studs or plates and is less than 1 inch from the nearest edge, the 2018 UPC requires:
Why is galvanized steel a poor material for a closed propylene-glycol collector loop serving a radiant floor?
On a closed, pressurized glycol space-heating collector loop (not drainback), automatic air vents belong:
A four-collector space-heating array is piped reverse-return. What is the purpose of that arrangement?
Per 2018 UPC Section 609.4, a completed copper hydronic water-supply section shall be tested how?
On a typical C-37B hydronic floor system, which material split is correct?
A long straight copper collector return on a sun-exposed Nevada roof will grow several tenths of an inch between a cold start and afternoon operation. The correct piping response is to:
A straight 48-foot run of 1-inch horizontal Type L copper collector header is supported at both ends. Using 2018 UPC Table 313.3 maximum spacing of 6 feet, what is the minimum number of supports along that run, including the two end supports?
Question · Hard
A 100-foot copper collector header is installed at 50°F and later operates at 200°F. Using a copper expansion coefficient of 9.4 × 10⁻⁶ in/in·°F, how much will the header grow?
An FSEC-style high-flow liquid collector field of 240 ft² is designed at 0.020 gpm per square foot. What collector-loop flow should the piping and circulator be sized to deliver?
A drainback space-heating collector loop has a low point in the roof piping that holds 3 gallons when the pump stops. Overnight the outdoor temperature is 15°F. What is the correct evaluation?
Which statement matches the official C-37B scope in NAC 624.540?
System Design
A homeowner wants one contractor to add glazed collectors that heat a hydronic floor and also unglazed collectors that heat the backyard pool. Under NAC 624.540, C-37B alone authorizes which portion?
PSI Candidate Information Bulletin 270 lists which reference as allowed in the C-37B exam center, and which two as study-only?
The official PSI C-37B examination has which format?
Which space-heating terminal works best with glazed solar collectors in winter?
For a C-37B system intended mainly for winter space heating, FSEC collector-tilt practice is to set the array at approximately:
In the northern hemisphere, FSEC orientation practice for a fixed space-heating collector array is to face:
A solar space-heating system for an occupied Nevada building must include which thermal backup?
Which three active C-37B system types are the usual ways to deliver solar heat to a building?
A 2,000 ft² Nevada house has a design heat-loss rate of 25 Btu/h·ft² at 70°F indoor and 10°F outdoor. What is the design space-heating load?
FSEC and standard solar-heating practice size an active C-37B system for which annual solar fraction?
A well-insulated 1,800 ft² Nevada house is a candidate for active solar space heating. Which collector-area starting point is consistent with FSEC/DOE space-heating rules of thumb?
FSEC liquid-system storage practice for glazed collectors serving space heat is about how many gallons of water per square foot of collector?
An air-collector C-37B system that stores heat in a rock bed is commonly sized at about:
Why are 180°F cast-iron baseboards a poor match for a glazed solar space-heating array?
A closed propylene-glycol collector loop heats a hydronic floor through a plate heat exchanger. What is the exchanger's job on a C-37B system?
If a C-37B collector fluid is toxic or is not listed as FDA food-grade, and that loop exchanges heat with potable water, 2018 UPC 505.4.1 / 603.5.4 require:
A closed glycol collector loop exchanges heat only with a closed hydronic floor loop. Neither loop is potable. Which exchanger construction is normally acceptable?
Annual space-heating energy for solar-fraction sizing is most directly estimated from:
A glazed space-heating array in July in Las Vegas will stagnate if the floor and tank cannot accept more heat. A proper C-37B design includes which overheat strategy?
A south-facing space-heating array cannot be aimed true south and must sit 45° west of south. FSEC orientation guidance says the designer should:
When would an FSEC designer pipe several glazed space-heating collectors in series rather than all in parallel?
A C-37B air-collector system delivers heat to occupied rooms through which typical device?
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