Nevada A General Engineering Contractor Examination

Per NDEP WTS-22, what is the minimum septic-tank capacity for an individual sewage disposal system?

• A500 gallons
• B750 gallons
• C1,000 gallons
• D1,500 gallons

Per NDEP WTS-22, what is the minimum horizontal separation from a septic tank to a water-supply well?

• A50 feet
• B100 feet
• C150 feet
• D200 feet

Using the commonly applied Ten States / Recommended Standards self-cleansing criterion, what is the minimum design slope of an 8-inch gravity sanitary sewer?

• A0.20 percent
• B0.28 percent
• C0.40 percent
• D1.00 percent

A commercial occupancy is assigned 1,200 gallons per day of domestic sewage. Using the NDEP WTS-22 formula for flows up to 1,500 gallons per day, what septic-tank capacity is required?

• A1,200 gallons
• B1,500 gallons
• C1,800 gallons
• D2,025 gallons

Unless an approved special crossing is detailed, what is the standard minimum horizontal separation between a potable water main and a sanitary sewer?

• A5 feet
• B10 feet
• C18 feet
• D25 feet

Where a potable water main must cross a sanitary sewer, the water main is typically required to have at least how much vertical clearance above the sewer?

• A6 inches
• B12 inches
• C18 inches
• D36 inches

Thrust blocks or other approved restraint are required on a pressure water main at which locations?

• AOnly at fire hydrants
• BOnly on pipe larger than 12 inches
• CAt bends, tees, reducers, dead ends, and other points where flow changes direction or sto…
• DOnly where the main is installed above grade

Under AWWA C600 practice commonly specified on Nevada water mains, a new ductile-iron pressure line is hydrostatically tested at about 1.5 times working pressure, and not less than which pressure and duration?

• A100 psi for 30 minutes
• B125 psi for 1 hour
• C150 psi for 2 hours
• D250 psi for 4 hours

Unless the drawings or frost depth require more cover, DIPRA installation practice for buried ductile-iron water mains commonly uses a minimum cover of about how much?

• A12 inches
• B18 inches
• C24 inches
• D36 inches

After a new potable water main passes its pressure test, which AWWA standard governs disinfection before the line is placed in service?

• AAWWA C105 polyethylene encasement
• BAWWA C600 installation of ductile-iron mains
• CAWWA C651 disinfection of water mains
• DAWWA C900 PVC pressure pipe

In corrosive soils, DIPRA practice protects buried ductile-iron pipe with which method?

• ACoal-tar enamel only on the joints
• BLoose polyethylene encasement (AWWA C105)
• CA 6-inch concrete cap over the pipe
• DZinc paint on the interior lining

On a long potable transmission main, combination air-release / vacuum valves are placed primarily at which locations?

• AEvery bell-and-spigot joint
• BLow points and creek crossings only
• CHigh points and other locations where air can collect or a vacuum can form
• DOnly next to fire hydrants

An 8-inch inside-diameter water main flows at 4 feet per second. What is the approximate discharge? (Q = AV; 1 cfs ≈ 449 gpm)

• A314 gpm
• B450 gpm
• C627 gpm
• D880 gpm

How many gallons of water are contained in 500 feet of 12-inch inside-diameter pipe? (use 7.48 gallons per cubic foot)

• A1,470 gallons
• B2,200 gallons
• C2,940 gallons
• D3,740 gallons

A pressure gauge on a water main reads 80 psi. What is the equivalent static head of water? (1 psi ≈ 2.31 feet of water)

• A35 feet
• B80 feet
• C148 feet
• D185 feet

Per NFPA 30 (2018), a flammable liquid (Class I) has a closed-cup flash point below which temperature?

• A73 degrees Fahrenheit
• B100 degrees Fahrenheit
• C140 degrees Fahrenheit
• D200 degrees Fahrenheit

Per NFPA 30 (2018), diesel fuel with a flash point of about 125°F is which liquid class?

• AClass IA
• BClass IB
• CClass II
• DClass IIIB

Per ASME B31.8 (2018), what design factor F is used for steel gas transmission pipe in a Location Class 1 area?

• A0.40
• B0.50
• C0.60
• D0.72

Under APWA Uniform Color Code used with Nevada One-Call markings, which color identifies gas, oil, steam, and other gaseous or petroleum materials?

• ARed
• BYellow
• CBlue
• DGreen

Per ASME B31.8 (2018), Location Class 1 is a 1-mile sliding window that contains how many buildings intended for human occupancy (counted within 220 yards of the pipeline centerline)?

• A10 or fewer
• BMore than 10 but fewer than 46
• C46 or more
• DAny area with a four-story building

Per ASME B31.8 (2018), what design factor F applies to steel gas transmission pipe in a Location Class 3 area?

• A0.40
• B0.50
• C0.60
• D0.72

The Barlow hoop-stress formula used in ASME B31.8 steel pipe design is which of the following?

• AS = 2P / Dt
• BS = PD / 2t
• CS = 2t / PD
• DS = Pt / 2D

For a new steel gas-transmission segment in Location Class 3 or 4, ASME B31.8 hydrostatic strength tests are typically run to at least what multiple of MAOP?

• A1.10 times MAOP
• B1.25 times MAOP
• C1.40 times MAOP
• D2.00 times MAOP

Per NFPA 30, a diked area around aboveground tanks must have a volumetric capacity not less than which of the following?

• A25 percent of the largest tank
• BThe largest tank in the diked area
• CThe sum of every tank in the yard
• DTwo times the largest tank plus rainfall

Unless rock excavation or a road crossing requires more, ASME B31.8 normal-excavation cover for gas transmission pipe in Location Class 2, 3, or 4 is typically how much to the top of pipe?

• A12 inches
• B18 inches
• C24 inches
• D36 inches

A steel gas-transmission pipe has outside diameter 20 inches, SMYS 52,000 psi, design factor F = 0.50 (Class 3), and joint and temperature factors of 1.00. For an internal design pressure of 1,000 psi, what wall thickness does t = PD / (2 × SMYS × F) require?

• A0.192 inch
• B0.240 inch
• C0.385 inch
• D0.500 inch

A 1-mile sliding window along a gas-transmission route now contains 52 dwellings intended for human occupancy within 220 yards of the centerline. Per ASME B31.8, what location class and design factor apply?

• AClass 1, F = 0.72
• BClass 2, F = 0.60
• CClass 3, F = 0.50
• DClass 4, F = 0.40

A tack coat is applied on an asphalt paving job primarily to do which of the following?

• AWaterproof the subgrade before placing aggregate base
• BBond a new hot-mix lift to the existing pavement or previous lift
• CCure a freshly rolled surface overnight
• DReplace compaction of the surface course

In the absence of a superelevation or special drainage detail, the typical finished cross slope (crown) of a paved travel lane is about which of the following?

• A0.5 percent
• B2 percent
• C6 percent
• D12 percent

The usual roller train on a hot-mix asphalt mat, in order, is which of the following?

• AFinish roller, breakdown roller, then pneumatic intermediate
• BBreakdown (initial) roller, intermediate roller, then finish roller
• CPneumatic roller only, after the mat cools below 150°F
• DVibratory breakdown after the finish roller to close the texture

Hot-mix asphalt compaction should generally be completed before the mat cools below about which temperature?

• A225°F
• B175°F to 185°F
• C120°F
• D90°F

A 12-foot-wide lane is paved 400 feet long at 2.5 inches compacted thickness. Using 145 pounds per cubic foot for compacted hot-mix, how many tons are required (no waste)?

• A36 tons
• B54 tons
• C73 tons
• D109 tons

A prime coat differs from a tack coat in that prime is applied to which surface?

• AExisting asphalt immediately before an overlay
• BFreshly rolled hot-mix to seal the surface
• CUntreated aggregate base or a prepared subgrade to waterproof and bind fines
• DSteel bridge decks only

Field density of a Superpave or Marshall hot-mix surface course is commonly specified as a percentage of which reference density?

• AStandard Proctor maximum dry density of the aggregate only
• BTheoretical maximum specific gravity (Rice, Gmm), typically about 92 to 96 percent
• CBulk specific gravity of the coarse aggregate only
• DUnit weight of water at 62.4 pounds per cubic foot

A compacted hot-mix lift should generally be at least about how thick relative to the nominal maximum aggregate size?

• AEqual to the nominal maximum size
• BAbout 1.5 times the nominal maximum size
• CAbout 3 times the nominal maximum size
• DAt least 12 times the nominal maximum size

Longitudinal joint segregation and a coarse, open texture along a paver edge are best prevented by which field practice?

• AStarving the screed and running the hopper empty between trucks
• BKeeping the hopper, slat conveyors, and augers uniformly charged and overlapping the cold…
• CDumping mix in piles ahead of the paver and blading it to grade
• DRolling the joint only after the adjacent lane has cooled below 150°F

A 24-foot roadway is paved 800 feet long at 2.5 inches compacted thickness. Using 145 pounds per cubic foot, how many tons of hot-mix are required (no waste)?

• A145 tons
• B232 tons
• C290 tons
• D435 tons

How many square yards will 180 tons of compacted hot-mix cover at 2 inches thickness if the mix weighs 145 pounds per cubic foot?

• A827 square yards
• B1,240 square yards
• C1,655 square yards
• D2,480 square yards

A 12-foot lane is paved for 1 mile (5,280 feet) at 2 inches compacted thickness. Using 145 pounds per cubic foot, what is the required hot-mix tonnage (no waste)?

• A383 tons
• B511 tons
• C766 tons
• D1,021 tons

Soil compacted on the dry side of the Proctor curve is usually more difficult to densify because it is below which value?

• AThe liquid limit
• BThe plastic limit
• COptimum moisture content
• DThe shrinkage limit

Compared with the standard Proctor test, the modified Proctor test uses which of the following?

• ALess compactive energy and a higher optimum moisture
• BThe same energy but a larger mold only
• CGreater compactive energy, usually producing a higher maximum dry density and a lower opt…
• DNo moisture-density curve

Embankment and structural fill on Nevada highway and utility work are most often accepted at not less than which relative compaction?

• A85 percent of maximum dry density
• B90 percent of maximum dry density
• C95 percent of maximum dry density
• D100 percent of the wet density of the borrow pit

A cut yields 3,200 bank cubic yards of soil that swells 20 percent when loaded. How many loose cubic yards must the trucks haul?

• A2,560 LCY
• B3,200 LCY
• C3,840 LCY
• D4,000 LCY

A nuclear density gauge reports wet density and moisture. Relative compaction is computed from which pair of values?

• AWet density divided by the Proctor maximum dry density
• BField dry density (wet density / (1 + moisture decimal)) divided by the Proctor maximum d…
• CMoisture content divided by optimum moisture
• DGauge count rate divided by the standard count only