Nevada C-1K Industrial Piping Contractor Examination

Per 2018 UPC Section 609.1, after steel or copper industrial water pipe is cut, the burred end shall be:

• ALeft sharp so the next fitting bites the thread
• BReamed to the full bore of the pipe or tube
• CPeened shut to increase wall thickness
• DCoated with oxygen before assembly

When making a taper-threaded steel joint on an industrial water or gas line, pipe-joint compound or tape shall be applied:

• AOnly on the female threads so excess is forced into the bore
• BOn the male threads only, kept out of the first thread if the listing requires it
• COn both male and female threads and smeared into the pipe ID
• DNever; threaded industrial joints must be assembled dry

A 2018 UPC/UMC industrial water offset is made with two 45-degree elbows. If the required offset (center-to-center) is 10 inches, the travel (center-to-center length of the offset piece) is closest to:

• A10 inches
• B12 inches
• C14 inches
• D20 inches

A copper industrial potable-water line is joined to a galvanized-steel header. Per 2018 UPC Chapter 6, the dissimilar-metal joint shall:

• ABe made with a dielectric union or other approved insulating fitting
• BBe sweated directly copper-to-steel so the solder isolates the metals
• CUse a steel coupling and extra pipe dope
• DBe omitted; copper may never connect to steel under the UPC

Per 2018 UPC Section 609.5, unions on industrial water supply piping that serve regulating equipment, water heaters, or conditioning tanks shall be installed not more than how far from that equipment?

• A6 inches
• B12 inches
• C24 inches
• D6 feet, if the union is accessible

On a 4-inch Schedule 40 industrial process water line, a long-radius 90-degree elbow is preferred over a short-radius 90 primarily because it:

• AUses less metal and is always cheaper
• BReduces pressure drop and erosion compared with a short-radius turn
• CEliminates the need for hangers on both sides of the fitting
• DIs the only 90-degree fitting the 2018 UPC allows

A 2-inch carbon-steel industrial chemical line will operate at 250 psi and 300°F. Which joint type is the most appropriate default for the straight-run joints?

• AStandard 150-pound threaded couplings with hemp packing
• BButt-welded or listed high-pressure mechanical joints rated for the temperature and press…
• CSoldered copper fittings adapted onto steel nipples
• DSolvent-cemented Schedule 40 PVC couplings

Per 2018 UPC Section 609.1, changes in direction of rigid industrial water piping shall be made:

• ABy heating and kinking the pipe around a column
• BBy the appropriate use of fittings, except copper or copper-alloy tubing may be bent with…
• COnly with welded miters cut at 22-1/2 degrees, regardless of material
• DBy flattening the pipe and folding it

A 6-inch Class 150 raised-face flange on an industrial water header is being made up. The gasket shall:

• ABe a full-face sheet that covers the bolts even though the flange is raised-face
• BBe a ring gasket that seats on the raised face, with bolts tightened in a star pattern
• CBe omitted if extra pipe dope is used on the raised face
• DBe two stacked rubber rings of any material

A 3-inch Schedule 40 steel spool needs two long-radius 90-degree elbows and a 48-inch center-to-center run between elbow centers. Using a long-radius takeout of 4-1/2 inches per 3-inch 90 (1.5 × NPS), the cut length of the straight pipe between the two welds is:

• A39 inches
• B43-1/2 inches
• C48 inches
• D57 inches

Compared with Schedule 40 carbon-steel pipe of the same NPS, Schedule 80 pipe has:

• AThe same wall thickness and a larger outside diameter
• BA thicker wall and a smaller inside diameter; the outside diameter stays the same
• CA thinner wall so it can carry more flow
• DNo listed pressure rating

Among ASTM B88 copper water tubes used on industrial potable-water piping, which type has the thickest wall and is the usual choice for underground service?

• AType M
• BType L
• CType K
• DType DWV

Per 2018 UPC Section 609.3, ferrous industrial water piping installed in or under a concrete slab on grade shall:

• ARely on mill galvanizing as the only corrosion protection
• BHave an approved machine-applied protective coating; galvanizing alone is not adequate
• CBe left bare so the concrete passivates the steel
• DBe Type M copper painted with asphalt

Which copper product is not acceptable for an industrial steam or high-temperature condensate line under the 2018 UMC hydronic/steam material rules?

• AType L copper tube listed for the temperature and pressure
• BType K copper tube listed for the temperature and pressure
• CType M copper tube
• DBrass or copper-alloy pipe listed for steam service

For an industrial chemical-transfer line carrying a chlorinated solution at 160°F, which plastic is the more appropriate UPC/UMC-recognized pressure piping material?

• ASchedule 40 PVC solvent-welded DWV pipe
• BCPVC pressure pipe listed for the chemical, temperature, and pressure
• CABS DWV pipe
• DPEX-A plumbing tube rated only to 180°F potable water

A food-process water and ingredient line that must be cleaned in place is most commonly specified in which material?

• AGalvanized Schedule 40 steel with threaded joints
• BType M copper with 50-50 solder
• CStainless-steel sanitary tubing (typically 304 or 316/316L) with hygienic fittings or orb…
• DBlack iron steam pipe painted white

PEX tubing listed in 2018 UPC Table 313.3 and Chapter 6 is acceptable for which industrial-plant service, and not for which service?

• AAcceptable for low-temperature potable or hydronic water where listed; not acceptable as…
• BAcceptable as 150 psig steam mains; not acceptable for cold water
• CAcceptable as underground fuel-gas pipe; not acceptable for water
• DAcceptable for refrigerant liquid lines; not acceptable for hydronics

An industrial acid-transfer line will handle concentrated sulfuric acid at ambient temperature. The most appropriate piping material choice among the following is:

• AType L copper with 95-5 solder
• BUnlined carbon-steel Schedule 40 with threaded joints
• CA listed chemically compatible system such as PTFE-lined steel, PVDF, or alloy specified…
• DGalvanized steel with dielectric unions

A carbon-steel hanger clamp is tightened directly onto a bare copper industrial water tube. The principal materials risk is:

• AThe copper will become magnetic
• BGalvanic corrosion of the steel clamp and staining or pitting at the contact band
• CThe copper will spontaneously anneal
• DThe UPC requires steel clamps on copper so that the circuit is bonded

Using the ASME B36.10 weight of 10.79 lb/ft for 4-inch Schedule 40 carbon-steel pipe, the empty weight of a 20-foot joint is closest to:

• A108 pounds
• B162 pounds
• C216 pounds
• D324 pounds

A 2-inch Schedule 40 steel industrial water line weighs 3.65 lb/ft empty. The inside diameter is 2.067 inches. Using 62.4 lb/ft³ for water, the water-filled weight per foot is closest to:

• A3.65 lb/ft
• B5.1 lb/ft
• C7.3 lb/ft
• D10.8 lb/ft

For an industrial low-pressure steam supply main, which material is the correct default among the following?

• AGalvanized Schedule 40 steel
• BBlack (uncoated) carbon-steel pipe listed for steam, with fittings rated for the temperat…
• CPVC Schedule 80
• DPEX-AL-PEX

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

• AExposed indoor plant piping above 5 psi
• BUnderground outdoor installation, with an electrically continuous corrosion-resistant tra…
• CAppliance connectors inside a boiler room
• DSteam condensate return inside the building

A dairy process line will see hot caustic CIP and chlorinated sanitizer. Which stainless selection is the better default?

• A304 stainless with ordinary carbon-steel socket-weld fittings
• B316/316L sanitary stainless with compatible hygienic fittings or orbital welds
• C409 automotive exhaust stainless with threaded black-iron fittings
• DGalvanized steel pickled to look bright

Before a flange on an in-service industrial chemical line is broken, the C-1K crew shall first:

• ARaise system pressure so residual product is forced out of the joint
• BIsolate the line, relieve stored pressure and heat, drain or purge the product, and apply…
• CCrack the flange while the pump is still running so flow indicates the line is live
• DPurge the line with pure oxygen

An industrial process piping system that carries more than one fluid in the same rack shall be identified so that:

• AOnly the electrician can read the labels
• BContent, and where required flow direction and hazard, remain readable after insulation a…
• CAll lines are painted the same color to hide the service
• DLabels are applied only after the first leak

A 120-foot straight carbon-steel process-water header will see a 180°F temperature rise. Using a linear expansion coefficient of 6.5 × 10⁻⁶ in/in·°F, the unrestrained expansion is closest to:

• A0.14 inches
• B0.70 inches
• C1.68 inches
• D3.36 inches

A process pump on an industrial chemical skid should have isolation valves located:

• AOnly on the discharge, so the suction can never be shut off
• BOn both the suction and the discharge so the pump can be removed without draining the ent…
• COnly at the plant fence, 400 feet away
• DNowhere; process pumps are removed under full line pressure

Before selecting gaskets, valve trim, and pipe alloy for a new industrial chemical service, the contractor should first consult:

• AThe safety data sheet and the owner's material-compatibility specification
• BThe paint color of the nearest existing line
• CA residential PEX catalog
• DOnly the motor nameplate voltage

A 200-foot copper process-water line will be heated from 40°F to 140°F. Using α = 9.4 × 10⁻⁶ in/in·°F, the unrestrained expansion is closest to:

• A0.19 inches
• B1.13 inches
• C2.26 inches
• D4.52 inches

An industrial process drain that must empty a tank by gravity should be installed so that:

• AIt is run dead-level to save fittings
• BIt is pitched continuously toward the receptor and has no undrained pockets
• CIt rises to a high point in the middle of the run to create a siphon
• DIt is capped at both ends until the first spill

An expansion loop is added to a long industrial steam header primarily to:

• AIncrease steam velocity so condensate cannot form
• BAbsorb thermal growth so anchors and equipment nozzles are not overloaded
• CReplace the steam trap at the end of the main
• DAllow the pipe to be installed without hangers

Which test medium is prohibited for pressure-testing industrial process, hydronic, fuel-gas, or refrigerant piping?

• AClean water
• BDry nitrogen
• COxygen
• DCarbon dioxide on metallic fuel-gas pipe

On a stainless food-process line that will be cleaned in place, the preferred joint in the product zone is:

• AA standard NPT threaded coupling with pipe dope
• BAn orbital or sanitary automatic TIG weld, or a listed hygienic clamp joint, with a crevi…
• CA 50-50 soldered copper adapter
• DA black-iron union painted stainless color

A dead-leg branch on an industrial food or pharmaceutical process line is a problem primarily because it:

• AIncreases steam pressure in the main
• BHolds stagnant product that cannot be cleaned or flushed
• CIs required by the 2018 UPC as a sediment trap on every water line
• DReduces hanger spacing to 2 feet automatically

A closed industrial hydronic process loop operates at 80 psi. Per 2018 UMC Section 1205.2, the minimum hydrostatic (or permitted pneumatic) test pressure and hold time are:

• A80 psi for 5 minutes
• B100 psi for 15 minutes, because that is the UPC potable-water air test
• C120 psi (1.5 × 80, which already exceeds the 100 psi floor) held not less than 30 minutes…
• D200 psi for 2 hours on plastic pipe using air

Per 2018 UPC Section 1213.3 (and the parallel 2018 UMC Chapter 13 rule), a new low-pressure industrial fuel-gas system that is not welded and will operate at not more than 14 inches water column shall stand an air, CO2, or nitrogen test of not less than:

• A3 psi for 10 minutes
• B10 psi for not less than 15 minutes with no perceptible drop
• C60 psi for 30 minutes
• DWorking pressure only, held for 5 minutes

Per 2018 UPC Section 1213.3, welded industrial fuel-gas piping, or piping that will carry gas at more than 14 inches water column, shall be tested at not less than:

• A10 psi for 15 minutes
• B15 psi for 15 minutes
• C25 psi for 10 minutes
• D60 psi for not less than 30 minutes

Per 2018 UPC Section 1212.5, each industrial gas appliance shall have a shutoff valve in the same room as the appliance and within what maximum distance of the appliance?

• A3 feet
• B6 feet
• C10 feet
• D25 feet if the valve is readily accessible

Where a sediment trap is not built into an industrial gas appliance, 2018 UPC 1212.9 requires the trap to be installed:

• AUpstream of the appliance shutoff valve, as close to the meter as practical
• BDownstream of the appliance shutoff valve, as close to the appliance inlet as practical
• CIn the street-side service riser below the meter
• DOnly on propane systems; natural-gas appliances do not need sediment traps

Per 2018 UPC/UMC Table 313.3 and the fuel-gas support table, horizontal 1/2-inch steel industrial gas pipe shall be supported at intervals not exceeding:

• A4 feet
• B6 feet
• C10 feet
• D12 feet

A listed flexible gas appliance connector serving an industrial water heater under the 2018 UPC shall not exceed what maximum length?

• A3 feet
• B6 feet
• C10 feet
• DThere is no length limit if the connector is listed

Per 2018 UPC Section 1210.1.6, underground industrial fuel-gas piping shall have a minimum cover of 12 inches, increased to 18 inches where external damage is likely. If 12 inches of cover cannot be provided, the acceptable installation is to:

• ALeave PE pipe at 6 inches of cover if a tracer wire is provided
• BInstall the pipe in a conduit or bridge (shield) it
• CWrap steel pipe with duct tape and bury it at 8 inches
• DReduce cover to 6 inches for any metallic pipe

Per 2018 UPC Section 1211.2, CSST industrial fuel-gas piping shall be bonded to the electrical service grounding electrode system with a copper bonding jumper not smaller than:

• A10 AWG copper
• B8 AWG copper
• C6 AWG copper
• D4 AWG aluminum only

Using the 2018 UPC longest-length method, a 1-inch industrial gas branch 30 feet from the meter on a system whose most remote appliance is 120 feet from the meter is sized from which table column?

• AThe 30-foot column, because that is the branch length
• BThe 75-foot column, averaging the two lengths
• CThe 120-foot column, because the entire system is sized from the longest run
• DThe 10-foot column, because the branch is short

Metallic industrial fuel-gas pipe installed underground shall be:

• ABare mill steel, because soil protects the pipe
• BProtected by an approved coating or wrapping; field wrap is limited to fittings and short…
• CGalvanized only, with no additional coating required in any soil
• DPainted with latex after backfill

Industrial fuel-gas piping shall not be installed in which of the following locations?

• AA dedicated, ventilated mechanical room
• BA chimney, flue, dumbwaiter, elevator shaft, or air-handling duct used for other than the…
• CAn accessible pipe chase used only for piping
• DAn outdoor rack on listed supports