CSLB Class A — General Engineering (Trade Exam) — All Questions

Soil with water freely seeping from the trench wall is classified as which type?

• a.Type B
• b.Type A
• c.Stable rock
• d.Type C✓

Submerged soil or soil from which water is freely seeping is Type C.Cal. Code Regs. tit. 8, 1541.1 App. A

What is the maximum slope for a 15-foot-deep excavation in Type B soil?

• a.2:1
• b.3/4:1
• c.1/2:1
• d.1:1✓

Type B soil allows a maximum slope of 1H:1V for excavations less than 20 feet deep.Cal. Code Regs. tit. 8, 1541.1 App. B

An 8-foot-deep excavation in Type A soil has an unsupported vertical lower portion. How tall may that vertical portion be?

• a.8 feet
• b.3-1/2 feet✓
• c.18 inches
• d.5 feet

In Type A soil, excavations 8 feet or less deep with unsupported vertically sided lower portions may have a maximum vertical side of 3-1/2 feet.Cal. Code Regs. tit. 8, 1541.1 App. B

A 4-foot trench in running sand shows raveling. Is a protective system required?

• a.No, because sand drains well
• b.No, because it is under 5 feet
• c.Yes, if the competent person sees cave-in potential✓
• d.Only if the trench is over 100 feet long

The under-5-foot exception applies only when a competent person finds no indication of potential cave-in.Cal. Code Regs. tit. 8, 1541.1

Workers must cross a trench 7 feet deep and 24 inches wide. Are walkways with guardrails required by section 1541(l)?

• a.No, it is under 30 inches wide✓
• b.Yes, for any trench over 5 feet
• c.Yes, for any trench over 6 feet
• d.No, walkways are never required

Walkways or bridges with guardrails are required over excavations more than 6 feet deep and wider than 30 inches; both conditions must be met.Cal. Code Regs. tit. 8, 1541

How often must a competent person inspect an excavation that workers enter?

• a.Daily and after rainstorms✓
• b.Only when first opened
• c.Only after an earthquake
• d.Weekly

Inspections are daily before work and as needed, and after every rainstorm or other hazard-increasing occurrence.Cal. Code Regs. tit. 8, 1541

Before entering a 6-foot trench near buried fuel tanks, what is required?

• a.A spotter at the surface only
• b.A second ladder only
• c.A wider trench bottom
• d.Testing the trench atmosphere✓

Where a hazardous atmosphere could reasonably be expected, such as near stored hazardous substances, the atmosphere is tested before entry into excavations over 4 feet deep.Cal. Code Regs. tit. 8, 1541

A shield sits in a trench with sloped upper walls. How far must its sides extend above the vertical walls?

• a.At least 18 inches✓
• b.At least 6 inches
• c.Flush with the vertical wall
• d.At least 36 inches

Shield sides must extend at least 18 inches above the vertical walls of compound excavations.Cal. Code Regs. tit. 8, 1541.1

Where must the approved design for a trench support system be kept while it is being built?

• a.On the job site✓
• b.At the Cal/OSHA district office
• c.At the engineer's office
• d.With the equipment supplier

At least one copy of the design must be kept at the jobsite during construction of the protective system.Cal. Code Regs. tit. 8, 1541.1

Which members does the Appendix C timber shoring table size?

• a.Crossbraces, uprights and wales✓
• b.Hydraulic cylinders
• c.Sheet piles and tiebacks
• d.Only the uprights

Appendix C selects crossbraces, uprights and, where required, wales for trenches up to 20 feet deep.Cal. Code Regs. tit. 8, 1541.1 App. C

When must sediment be removed from a Type 2 inlet sediment trap on Caltrans work?

• a.Only at the end of the project
• b.When it is completely full
• c.After every working day
• d.When its volume is reduced by about half✓

Caltrans requires removing sediment from a Type 2 inlet sediment trap when its volume has been reduced by approximately one-half.Caltrans Standard Specifications (2025) 13-6

What must surround a covered soil stockpile on a Caltrans job?

• a.A concrete washout
• b.A sediment barrier✓
• c.A chain-link fence
• d.A drainage inlet

Caltrans covers active and inactive soil stockpiles and surrounds them with a linear sediment barrier.Caltrans Standard Specifications (2025) 13-4

Who classifies a tunnel for gas before bidding?

• a.The tunneling contractor
• b.The local fire department
• c.Cal/OSHA's Division✓
• d.The pipe manufacturer

The owner submits geological information and the Division classifies the tunnel before bidding and underground work.Cal. Code Regs. tit. 8, 8422

What kind of drilling fluid may be used for directional boring on Caltrans work?

• a.No fluid of any kind
• b.An oil-based mud
• c.A water-based fluid✓
• d.Diesel fuel as a lubricant

Mineral slurry or wetting solution may lubricate the tool and stabilize the hole; it must be water based.Caltrans Standard Specifications (2025) 20-2.07

An operator marks a gas line with two marks showing the pipe's outside edges. How far does the tolerance zone extend?

• a.24 inches from the midpoint
• b.12 inches from each mark
• c.36 inches from each mark
• d.24 inches from each mark✓

When the marks show the width of the installation, the tolerance zone is 24 inches from each outside marking.Gov. Code 4216

An excavator gouges a sewer force main during trenching. When must the regional notification center be told?

• a.Only if it leaks
• b.Within 10 working days
• c.Within 48 hours✓
• d.At the end of the project

Damage to any subsurface installation is reported to the operator immediately and to the regional notification center within 48 hours.Gov. Code 4216.4

A new water main will run parallel to a line carrying disinfected tertiary recycled water. What minimum horizontal separation applies?

• a.10 feet
• b.4 feet✓
• c.2 feet
• d.25 feet

New water mains are at least 4 feet horizontally from, and one foot above, parallel lines carrying disinfected tertiary recycled water or storm drainage.Cal. Code Regs. tit. 22, 64572

How far must a new water main be from the nearest edge of a septic leach field?

• a.10 horizontal feet
• b.25 horizontal feet✓
• c.100 horizontal feet
• d.4 horizontal feet

New water mains may not be within 25 horizontal feet of a cesspool, septic tank, leach field or seepage pit.Cal. Code Regs. tit. 22, 64572

How far in advance is the engineer notified of a pressure test on Caltrans work?

• a.7 days
• b.48 hours✓
• c.2 hours
• d.10 days

Caltrans requires notifying the engineer at least 48 hours before performing a pressure test.Caltrans Standard Specifications (2025) 20-2.01A(4)(b)

How soon after mixing must slurry cement backfill be placed?

• a.Within 24 hours
• b.Within 8 hours
• c.Within 4 hours
• d.Within 1 hour✓

Slurry cement backfill is placed within 1 hour of mixing; nothing is placed on top for at least 4 hours.Caltrans Standard Specifications (2025) 19-3.03F

What must be done at the end of each day with the ends of installed corrugated PVC pipe that were not backfilled?

• a.Cover them each day✓
• b.Cut them back 2 feet
• c.Leave them open to drain
• d.Fill them with sand

Caltrans requires covering the ends of installed corrugated PVC pipe that were not backfilled at the end of each day.Caltrans Standard Specifications (2025) 64-2.03

A trench 6 feet deep has a ladder at one end only. A worker is at a spot 40 feet from it along the trench. What does Cal/OSHA's egress rule say?

• a.It is not met, because ladders must be spaced 100 feet apart on a trench
• b.It is met, because 6 feet is under the 10-foot depth that triggers the rule
• c.It is not met, because more than 25 feet of lateral travel is required✓
• d.It is met, because trenches over 4 feet need one ladder at the end of the run

Trenches 4 feet or deeper need a safe means of egress located so employees travel no more than 25 feet laterally. Not "It is met, because trenches over 4 feet need one ladder at the end of the run": one ladder does not satisfy a travel-distance limit. Not "It is met, because 6 feet is under the 10-foot depth that triggers the rule": egress starts at 4 feet in depth. Not "It is not met, because ladders must be spaced 100 feet apart on a trench": no such spacing is stated; the limit is travel distance.Cal. Code Regs. tit. 8, 1541(c)(2)

Excavated spoil is stacked at the edge of a 6-foot trench. Without retaining devices, how close to the edge may the spoil and equipment be kept?

• a.At least 2 feet back from the edge✓
• b.Anywhere on the site if the soil is Type A
• c.At the edge, if the pile is under 3 feet
• d.At least 10 feet back from the edge

Materials and equipment must be kept at least 2 feet from the edge, or retaining devices must be used. Not "At the edge, if the pile is under 3 feet": height does not remove the setback rule. Not "At least 10 feet back from the edge": the stated distance is smaller. Not "Anywhere on the site if the soil is Type A": soil type does not change the setback.Cal. Code Regs. tit. 8, 1541(j)(2)

Among Types A, B and C, which soil allows the steepest maximum slope for an excavation under 20 feet deep?

• a.Type C, at 1 1/2:1
• b.Type B, at 1:1
• c.Type A, at 3/4:1✓
• d.The three share the same slope

Appendix B gives 3/4:1 for Type A, 1:1 for Type B and 1 1/2:1 for Type C, written horizontal to vertical, so Type A is steepest. Not "Type B, at 1:1": 1:1 is flatter than 3/4:1. Not "Type C, at 1 1/2:1": 1 1/2:1 is the flattest of the three. Not "The three share the same slope": each type has its own maximum slope.Cal. Code Regs. tit. 8, 1541.1 App. B

A sediment filter bag has no metal frame and is deeper than 18 inches. What must it include under the Caltrans specification?

• a.A second bag nested inside it to act as a liner against sediment
• b.Lifting loops, dump straps and a restraint cord✓
• c.A buried steel anchor cage
• d.A solid liner that blocks flow

Such a bag must include lifting loops, dump straps and a restraint cord to keep the sides of the bag away from the catch basin walls. Not "A second bag nested inside it to act as a liner against sediment": nesting a second bag is not what the specification calls for. Not "A solid liner that blocks flow": each bag must have a high-flow bypass, so a solid liner defeats it. Not "A buried steel anchor cage": no buried cage is required.Caltrans Standard Specifications (2025) 13-6.02C

A truck leaves soil on the paved street at a job entrance. Within what time must Caltrans work remove tracked material?

• a.Before the next rain
• b.6 hours✓
• c.1 week
• d.24 hours

Material tracked onto the surfacing must be removed within 6 hours. Not "24 hours": this is longer than the stated limit. Not "1 week": a week lets the material reach storm drains. Not "Before the next rain": the specification gives a fixed time limit.Caltrans Standard Specifications (2025) 13-7.01

When must sediment be removed from a sediment filter bag on Caltrans work?

• a.When it rains hard enough that the bag fills with water
• b.Not during the job, since the bag filters the sediment and holds it for good
• c.When the bag is full or the restraint cords are no longer visible✓
• d.At the end of the project, during the final site cleanup

Sediment is removed from a filter bag if it becomes full or if the restraint cords are no longer visible. Not "At the end of the project, during the final site cleanup": sediment is removed during the work. Not "Not during the job, since the bag filters the sediment and holds it for good": the bag is maintained. Not "When it rains hard enough that the bag fills with water": the trigger is the bag's fill state.Caltrans Standard Specifications (2025) 13-6.03A

How far ahead must the engineer be notified before dewatering activity discharges on Caltrans work?

• a.No notice if the water looks clear
• b.At least 5 minutes
• c.At least 32 hours✓
• d.At least 10 days before the discharge

The contractor notifies the engineer at least 32 hours in advance of dewatering activity discharges. Not "At least 5 minutes": far too short for the engineer to respond. Not "At least 10 days before the discharge": this exceeds the stated notice. Not "No notice if the water looks clear": the specification requires notice regardless of appearance.Caltrans Standard Specifications (2025) 13-2.03

A temporary check dam and an erosion control blanket are to go in the same ditch. Which is installed first?

• a.The blanket✓
• b.The check dam
• c.Neither, since they cannot share a ditch
• d.Whichever the crew has on site

If a check dam is placed in the same area as a blanket, the blanket is installed before the dam. Not "The check dam": the dam goes in after the blanket. Not "Whichever the crew has on site": the specification sets an order. Not "Neither, since they cannot share a ditch": the specification covers placing both in the same area.Caltrans Standard Specifications (2025) 13-6.03B

How are fiber roll stakes driven for a Type 1 temporary check dam on Caltrans work?

• a.Above the roll so the rope can slide off the top of the stake
• b.Until the stake top is flush with the ground surface
• c.Until the notch is even with the top of the roll✓
• d.Two inches into the soil, so the roll can be moved easily

Notched stakes are driven until the notch is even with the top of the fiber roll. Not "Until the stake top is flush with the ground surface": the notch, not the stake top, sets the depth. Not "Two inches into the soil, so the roll can be moved easily": this would not hold the roll against flow. Not "Above the roll so the rope can slide off the top of the stake": rope laced over the roll is held by the notch.Caltrans Standard Specifications (2025) 13-6.03B

Which discharge-related event requires Caltrans work to notify the engineer within 6 hours?

• a.Identifying a discharge that is causing or could cause water pollution✓
• b.A holiday shutdown of the job that lasts for two or more days
• c.A delivery of fiber rolls to the job site for the next phase
• d.A change of crew foremen on the day shift or the night shift

The contractor notifies the engineer within 6 hours when it identifies discharges that are causing or could cause water pollution. Not "A delivery of fiber rolls to the job site for the next phase": a delivery is not a discharge. Not "A change of crew foremen on the day shift or the night shift": personnel changes carry no such notice. Not "A holiday shutdown of the job that lasts for two or more days": a shutdown is not a discharge event.Caltrans Standard Specifications (2025) 13-2.03

Which systems may be used as a temporary concrete washout on Caltrans work?

• a.A pit dug beside a creek bank or ditch
• b.A storm drain inlet, if flushed with water
• c.A pile of sand and straw bales at the curb
• d.A washout facility, a portable washout or a washout bin✓

The specifications list a temporary concrete washout facility, a portable temporary washout or a temporary washout bin. Not "A storm drain inlet, if flushed with water": washout water may not be sent to a drain. Not "A pit dug beside a creek bank or ditch": a pit by a watercourse risks discharge. Not "A pile of sand and straw bales at the curb": sand does not contain washout water.Caltrans Standard Specifications (2025) 13-9.01A

On Caltrans work, how must active soil stockpiles be protected before a forecasted storm?

• a.Pushed into the nearest ditch to carry the runoff off the site along the road
• b.Left bare to let water drain through the pile and avoid ponding at the toe
• c.Watered to keep the surface wet and prevent dust from blowing away from the pile
• d.Covered with stabilization material or a temporary cover and ringed with a linear sediment barrier✓

The specifications cover active and inactive soil stockpiles and surround them with a linear sediment barrier. Not "Left bare to let water drain through the pile and avoid ponding at the toe": bare stockpiles erode in rain. Not "Pushed into the nearest ditch to carry the runoff off the site along the road": that sends the soil into drainage. Not "Watered to keep the surface wet and prevent dust from blowing away from the pile": water on a stockpile adds runoff and does not stabilize it.Caltrans Standard Specifications (2025) 13-4.03C(3)

Which operation 30 inches or larger is excepted from the Tunnel Safety Orders?

• a.A bore shorter than 60 feet in length, such as a service stub
• b.A bore in rock, where no one can enter the casing or the pit
• c.A bore under a public road or highway right of way
• d.A utility natural gas pipeline bore where no one bodily enters the bore✓

The orders do not apply to utility natural gas pipelines under PUC or federal pipeline safety jurisdiction where a person does not bodily enter the bore. Not "A bore under a public road or highway right of way": road location does not create an exception. Not "A bore shorter than 60 feet in length, such as a service stub": length is not an exception. Not "A bore in rock, where no one can enter the casing or the pit": soil or rock type is not an exception.Cal. Code Regs. tit. 8, 8403(a)(2)

A vertical shaft is planned 25 feet deep and employees may enter it. Which rules govern it?

• a.The Tunnel Safety Orders, from the shaft's inception✓
• b.The scaffold orders for elevated work, since a shaft is a deep structure
• c.Article 6, the excavation rules for trenches under 20 feet
• d.No Cal/OSHA rules apply to shafts that are dug by the owner

All shaft excavations intended to exceed 20 feet in depth where employees may enter are covered, and a shaft is a shaft from its inception. Not "Article 6, the excavation rules for trenches under 20 feet": shafts intended to exceed 20 feet are under the tunnel orders. Not "No Cal/OSHA rules apply to shafts that are dug by the owner": the tunnel orders name shafts expressly. Not "The scaffold orders for elevated work, since a shaft is a deep structure": shafts are not scaffolds.Cal. Code Regs. tit. 8, 8403(a)(4)

Which tunnel classification applies where there is little likelihood of encountering gas?

• a.Potentially gassy
• b.Gassy
• c.Extrahazardous
• d.Nongassy✓

Nongassy is applied to tunnels with little likelihood of encountering gas during construction. Not "Gassy": gassy applies where gas is likely or above 5 percent of the LEL. Not "Extrahazardous": that applies at 20 percent of the LEL or after gas ignition. Not "Potentially gassy": that applies where there is a possibility of flammable gas.Cal. Code Regs. tit. 8, 8422(b)

At what reading is a tunnel considered extrahazardous based on flammable gas measured at least 12 inches from any surface?

• a.1 percent of the LEL
• b.5 percent of the LEL
• c.100 percent of oxygen
• d.20 percent of the LEL✓

A concentration of 20 percent of the LEL of flammable gas at least 12 inches from any surface is an extrahazardous trigger. Not "5 percent of the LEL": that is the gassy trigger. Not "1 percent of the LEL": below the gassy trigger. Not "100 percent of oxygen": oxygen concentration is not the trigger.Cal. Code Regs. tit. 8, 8422(b)(4)

The tunnel's gas classification has been set. What must be done with the notice of it?

• a.Post it prominently at the job site and inform all personnel✓
• b.Post it after the first gas reading is taken inside the tunnel
• c.File it with the owner and keep it off the site until the job ends
• d.Give it to the foreman, with no posting for the other crews

The notice of classification and special conditions must be prominently posted at the tunnel job site and all personnel informed. Not "File it with the owner and keep it off the site until the job ends": the rule requires posting at the site. Not "Give it to the foreman, with no posting for the other crews": all personnel must be informed. Not "Post it after the first gas reading is taken inside the tunnel": the classification applies from the start of underground work.Cal. Code Regs. tit. 8, 8422(c)

During jack and drill work, what may be done to locate or remove obstructions in the pavement, if authorized?

• a.Small holes may be cut in the pavement✓
• b.The whole lane may be removed without approval
• c.Holes may be cut wherever the crew likes, without notice
• d.Nothing, because pavement may not be cut or drilled

If authorized, small holes may be cut in the pavement to locate or remove obstructions. Not "The whole lane may be removed without approval": the specification allows small holes if authorized. Not "Nothing, because pavement may not be cut or drilled": small holes may be cut if authorized. Not "Holes may be cut wherever the crew likes, without notice": the cutting requires authorization.Caltrans Standard Specifications (2025) 20-2.07C(2)(c)

How far ahead must the engineer be notified before jack and drill activities start on Caltrans work?

• a.At least 2 business days before starting✓
• b.No notice is required
• c.Notice on the day after drilling starts
• d.At least 30 calendar days

The contractor notifies the engineer at least 2 business days before starting jack and drill activities. Not "At least 30 calendar days": far longer than the stated notice. Not "No notice is required": the specification sets a notice period. Not "Notice on the day after drilling starts": notice comes before the activity starts.Caltrans Standard Specifications (2025) 20-2.07C(2)(c)

A bore pit crew notices the drilling fluid is softening the road subgrade. What does the Caltrans specification say about water?

• a.Add cement to the drilling fluid so the soft subgrade stiffens up
• b.Use more water to lubricate the bore and keep the tool cool
• c.Do not use excessive water that will soften the subgrade or undermine the pavement✓
• d.Water is not regulated in bores under the specification

The specification says not to use excessive water that will soften the subgrade or undermine the pavement. Not "Use more water to lubricate the bore and keep the tool cool": excess water is what damages the subgrade. Not "Water is not regulated in bores under the specification": the specification limits water near pavement. Not "Add cement to the drilling fluid so the soft subgrade stiffens up": no such step is called for.Caltrans Standard Specifications (2025) 20-2.07C(2)(c)

A new supply line carries raw water to be treated for drinking. What separation from a water main applies?

• a.It may share the main's trench with spacers between the pipes
• b.At least 4 feet horizontally and 1 foot below the water main✓
• c.At least 10 feet horizontally and 1 foot above
• d.No separation is required

New supply lines conveying raw water are installed at least 4 feet horizontally from, and one foot below, any water main. Not "At least 10 feet horizontally and 1 foot above": that is the sewage-line rule for a new water main. Not "It may share the main's trench with spacers between the pipes": a shared trench is not allowed for these lines. Not "No separation is required": a separation is stated.Cal. Code Regs. tit. 22, 64572(c)

From which part of each pipe are the minimum water main separation distances measured?

• a.The trench centerlines of the two pipe trenches
• b.The nearest outside edge of each pipe barrel✓
• c.The pipe joints nearest to each other along the run
• d.The pipe centerlines of the two pipes in the trench

The minimum separation distances are measured from the nearest outside edge of each pipe barrel. Not "The pipe centerlines of the two pipes in the trench": the rule measures edge to edge. Not "The pipe joints nearest to each other along the run": joints are not the reference points. Not "The trench centerlines of the two pipe trenches": trenches are not the reference points.Cal. Code Regs. tit. 22, 64572(g)

How far must a new water main be from the nearest edge of a sanitary landfill?

• a.100 horizontal feet✓
• b.25 horizontal feet
• c.10 horizontal feet
• d.500 horizontal feet

The rule bars mains within 100 horizontal feet of a sanitary landfill, wastewater pond or hazardous waste disposal site. Not "25 horizontal feet": that distance applies to septic tanks and leach fields. Not "10 horizontal feet": that is the sewage-line separation. Not "500 horizontal feet": this exceeds the stated setback.Cal. Code Regs. tit. 22, 64572(f)

What does Caltrans require of trench beds for culverts?

• a.Bearing the pipe on its bells, with the barrel left clear of the bed
• b.A single rock under the middle of the barrel to hold the pipe grade
• c.Shaping them to fit the bottom and give uniform support along the whole length✓
• d.Leaving the trench floor rough so the pipe grips the soil

Trench beds are shaped to fit the culvert's bottom and provide uniform support along its entire length. Not "Leaving the trench floor rough so the pipe grips the soil": uneven support concentrates loads at points. Not "Bearing the pipe on its bells, with the barrel left clear of the bed": the barrel must bear, not the bells. Not "A single rock under the middle of the barrel to hold the pipe grade": point support cracks pipe.Caltrans Standard Specifications (2025) 19-3.03H

How must the spigot be seated in a gasketed plastic pipe joint under Caltrans work?

• a.Inserted until the pipe end touches the back of the gasket
• b.Inserted until the factory insertion line meets the bell edge✓
• c.Pushed until the pipe will not move by hand further
• d.Left half-inserted so the joint can flex when the soil settles

The spigot end goes into the bell until the factory-provided insertion line lines up with the bell edge. Not "Pushed until the pipe will not move by hand further": over-insertion can damage the bell. Not "Left half-inserted so the joint can flex when the soil settles": a partly inserted joint can leak. Not "Inserted until the pipe end touches the back of the gasket": the stop is the insertion line, not the gasket.Caltrans Standard Specifications (2025) 64-2.03C

In Caltrans Method A pressure testing of an irrigation supply line, what pressure is used?

• a.Whatever the pump can deliver
• b.125 psi✓
• c.300 psi
• d.12.5 psi

The pipeline is placed under 125 psi for Method A. Not "12.5 psi": a tenth of the specified pressure. Not "300 psi": the working pressure rating of valves, not the test. Not "Whatever the pump can deliver": the test uses a specified pressure.Caltrans Standard Specifications (2025) 20-2.01A(4)(b)(ii)

During Method A testing, how long must the pressure gauge remain in place?

• a.It may be removed once the first period passes
• b.Until the pump is switched on again
• c.For the first 5 minutes of the test
• d.Until each test period is complete✓

The pressure gauge must remain in place until each test period is complete. Not "For the first 5 minutes of the test": the gauge stays through the whole test. Not "Until the pump is switched on again": the pressure source is removed for the test. Not "It may be removed once the first period passes": it stays until each test period ends.Caltrans Standard Specifications (2025) 20-2.01A(4)(b)(ii)

What accuracy must the pressure gauge have for Method A testing?

• a.Within 20 psi of the true pressure at the gauge
• b.Within 2 percent of 1,000 psi at full scale
• c.Within 2 psi, calibrated from 0 to 200 psi✓
• d.No calibration is needed if the gauge is new

The gauge is calibrated from 0 to 200 psi in 5 psi increments and accurate within a tolerance of 2 psi. Not "Within 20 psi of the true pressure at the gauge": too loose to read a 5 psi drop. Not "Within 2 percent of 1,000 psi at full scale": this is not the stated range. Not "No calibration is needed if the gauge is new": the specification requires calibration.Caltrans Standard Specifications (2025) 20-2.01A(4)(b)(ii)

Water supply lines on a bridge are tested as one unit. How far beyond the casing at each end do the unit's limits run?

• a.0 feet, ending at the casing
• b.50 feet
• c.5 feet✓
• d.1 inch

The unit limits are 5 feet beyond the casing at each end of the bridge, with each end capped using caps rated for the test pressure. Not "50 feet": far beyond the stated limit. Not "0 feet, ending at the casing": the unit extends past the casing. Not "1 inch": a trivial distance, not the stated limit.Caltrans Standard Specifications (2025) 20-2.13A(1)(d)