Nevada C-21G Industrial Piping Contractor Examination Feed

Threaded steel joints on C-21G industrial water, steam, and fuel-gas piping under the 2018 UPC/UMC shall be made with:

Pipe Fitting

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A C-21G crew finds a pair of 4-inch raised-face flanges 3/8 inch out of parallel. The correct way to close the joint is to:

Pipe Fitting

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A roll-grooved or cut-grooved mechanical coupling on C-21G industrial water or process pipe is acceptable only when:

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A 45-degree offset on a C-21G industrial chilled-water line must rise 18 inches center-to-center. The travel (center-to-center length of the offset piece) is closest to:

Pipe Fitting

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A 4-inch Schedule 40 C-21G process-water spool uses two long-radius 90-degree elbows. The required center-to-center distance between elbow centers is 60 inches. Using a long-radius takeout of 6 inches per 4-inch 90 (1.5 × NPS), the cut length of the straight pipe between the two welds is:

Pipe Fitting

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Two 2-inch long-radius 45-degree elbows make a C-21G offset whose travel is 24 inches center-to-center. Using a 45-degree takeout of 1-1/4 inches (5/8 × NPS), the cut length of the offset nipple between weld bevels is:

Pipe Fitting

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A grooved coupling on a C-21G food-process water line will see hot caustic CIP at about 180°F. The gasket shall be:

Pipe Fitting

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A 3-inch C-21G industrial water header needs a 1-inch branch. The preferred fitting, rather than a bushing screwed into a 3-inch tee, is:

Pipe Fitting

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A C-21G rolling offset must clear a duct: 12 inches of rise and 9 inches of roll, made with two 45-degree elbows. The travel of the offset piece is closest to:

Pipe Fitting

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A 5-inch long-radius 90 has a 7-1/2 inch takeout (1.5 × NPS). Two of those 90s are to be welded to a C-21G steam jumper whose finished center-to-center is 80 inches. The cut length of the jumper pipe is:

Pipe Fitting

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A 2-inch NPS carbon-steel pipe used on a C-21G industrial water line has which outside diameter?

Piping Materials

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For aboveground C-21G industrial potable-water distribution in copper, the usual ASTM B88 wall (thicker than Type M, thinner than Type K) is:

Piping Materials

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A C-21G food-process line will see chlorides from sanitizer and coastal plant air. Between common stainless grades, the better default is:

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Schedule 40 PVC pressure pipe on a C-21G industrial plant is acceptable for which service?

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The default metallic material for a C-21G low-pressure industrial steam supply main is:

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For a C-21G high-temperature, high-pressure steam or process line that will be butt-welded, the carbon-steel specification usually preferred over ordinary ASTM A53 Grade B ERW is:

Piping Materials

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Galvanized steel pipe is a poor choice for a C-21G steam or high-temperature condensate line primarily because:

Piping Materials

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A C-21G industrial hot-water process line will run at 180°F and 80 psi. Between common plastics, the more appropriate pressure-pipe choice is:

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A C-21G chemical-transfer line will handle dilute hydrochloric acid that attacks carbon steel and 304 stainless. A common industrial solution is:

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A C-21G ingredient-water line in a food plant must be cleaned in place and must not rust into the product. The usual metallic choice is:

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PEX tubing listed in 2018 UPC Chapter 6 is a reasonable C-21G choice for which plant service, and not for which service?

Piping Materials

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Before a C-21G fitter cuts into a mill-stenciled steel joint, the stencil (specification, grade, size, schedule) should be:

Piping Materials

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A 3-inch Schedule 40 carbon-steel C-21G water line weighs 7.58 lb/ft empty. The inside diameter is 3.068 inches. Using 62.4 lb/ft³ for water, the water-filled weight per foot is closest to:

Piping Materials

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Using the ASME B36.10 weight of 18.97 lb/ft for 6-inch Schedule 40 carbon-steel pipe, the empty weight of a 12-foot C-21G joint is closest to:

Piping Materials

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Before a C-21G crew opens a flanged joint on an in-service chemical line for a planned tie-in, the positive isolation that stays in place after valves are locked is typically:

Process Piping

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On a closed C-21G process or hydronic circuit, high-point vents and low-point drains are installed so that:

Process Piping

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Two incompatible C-21G process fluids (for example, a strong oxidizer and an organic) shall:

Process Piping

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On a long C-21G steam or hot-process header, an anchor, a guide, and a spring or sliding hanger have different jobs. The guide is there to:

Process Piping

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An 80-foot straight carbon-steel C-21G process-water header will see a 200°F temperature rise. Using α = 6.5 × 10⁻⁶ in/in·°F, the unrestrained expansion is closest to:

Process Piping

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A 150-foot copper C-21G process-water line will be heated from 50°F to 170°F. Using α = 9.4 × 10⁻⁶ in/in·°F, the unrestrained expansion is closest to:

Process Piping

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A C-21G process line is designed for 200 psig. Using the common ASME B31.3 hydrostatic-test concept (about 1.5 times design pressure, without citing a paragraph number), the minimum hydrotest pressure is closest to:

Process Piping

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A C-21G sanitary process line that must drain and clean in place should be installed so that:

Process Piping

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A C-21G process line cannot be filled with water for a hydrostatic test (linings, freeze, or a water-reactive chemical). A pneumatic strength test is being considered. The controlling reason extra precautions are required is that:

Process Piping

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A 250-foot straight stainless C-21G process header will see a 150°F rise. Using α = 9.6 × 10⁻⁶ in/in·°F, the unrestrained expansion is closest to:

Process Piping

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A C-21G process pump suction reducer on a horizontal suction line should be installed:

Process Piping

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A C-21G process line will carry a highly toxic chemical. Compared with ordinary utility water piping, fabrication and examination should be:

Process Piping

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The accepted media for a 2018 UPC/UMC pressure test of C-21G industrial fuel-gas piping are:

Gas Piping

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On a long C-21G industrial fuel-gas main, drips or sediment traps at low points are installed to:

Gas Piping

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CSST used on a C-21G industrial fuel-gas system shall be joined with:

Gas Piping

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Per 2018 UPC Section 318.2, a C-21G fuel-gas test that requires 10 psi or less shall use a test gauge with increments of:

Gas Piping

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Per 2018 UPC/UMC Table 313.3 (steel pipe for gas) and Table 1210.2.4.1, horizontal 1-1/4 inch and larger steel C-21G fuel-gas pipe shall be supported at intervals not exceeding:

Gas Piping

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Polyethylene (PE) pipe used for C-21G industrial fuel gas under the 2018 UPC/UMC is limited to:

Gas Piping

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The vent from a C-21G fuel-gas pressure regulator shall terminate:

Gas Piping

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C-21G industrial fuel-gas piping shall not be used to:

Gas Piping

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Using the 2018 UPC longest-length method, a 3/4-inch C-21G gas branch 18 feet from the meter on a system whose most remote appliance is 80 feet from the meter is sized from which table column?

Gas Piping

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Fourteen inches water column, the UPC 1213.3 threshold that separates the 10 psi / 15 minute gas test from the 60 psi / 30 minute test, is closest to which gauge pressure?

Gas Piping

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