Master Plumber (UPC/IPC) — All Questions

On a large project, what does a performance bond guarantee?

• a.That the contractor will receive a completion bonus for the project
• b.Nothing; performance bonds are not used in construction contracts
• c.That any workers' on-the-job injuries will be fully covered
• d.That the work will be completed per the contract✓

A performance bond guarantees the owner that the project will be completed per the contract; if the contractor defaults, the surety arranges completion or pays damages up to the bond. It is distinct from a bid bond and from insurance covering injuries. Large and public jobs commonly require it.Contract law

A plumber has completed 60 percent of an $80,000 contract. What amount is earned for progress billing to date?

• a.$60,000, using 75 percent complete instead of 60 percent
• b.$32,000, which is the 40 percent still remaining to complete
• c.$4,800, off by a factor of ten in the percentage
• d.$48,000✓

Earned to date = 60% x $80,000 = $48,000, which is the basis for the progress invoice (less any retainage). Progress billing ties payment to the percentage of work completed. Overbilling ahead of completed work can trigger disputes and lien issues.Business math

Upon receiving payment, a contractor is often asked to sign what document?

• a.A brand-new permit application for the completed scope of work
• b.A form transferring ownership of the property to the contractor
• c.A document that voids the workmanship warranty entirely
• d.A lien waiver✓

A lien waiver (conditional or unconditional, partial or final) releases the contractor's lien rights up to the amount paid, giving the owner clear title for that portion. It does not waive warranty obligations or transfer property. Waivers are exchanged as payments are made through the project.Contract/lien law

Many construction contracts specify how disputes are resolved outside court. What is a common example?

• a.A clause naming the building official as the binding arbitrator
• b.A mediation or arbitration clause✓
• c.A clause forbidding any dispute from ever arising on the project
• d.A clause banning both litigation and arbitration of all disputes

Contracts frequently include alternative-dispute-resolution clauses requiring mediation or binding arbitration before or instead of litigation, to resolve disputes faster and privately. The AHJ is not a private dispute arbitrator. Such clauses are enforceable and shape how claims are pursued.Contract law

What must be done with the permit card once a plumbing permit is issued?

• a.Keep it locked away safely in the contractor's main office
• b.Discard it right after the permit has been issued by the AHJ
• c.Surrender it permanently to the inspector at the first inspection
• d.Post it visibly at the jobsite✓

The permit (job) card must be posted at the site and kept available so inspectors can record approvals and the public can verify the work is permitted. Inspectors sign off each stage on the card. Failing to post it can delay inspections.Permit administration

A jurisdiction charges a sewer capacity fee of $30 per drainage fixture unit. A building has 120 DFU. What is the fee?

• a.$360, off by a factor of ten in the multiplication
• b.$36,000, off by a factor of ten the other direction
• c.$3,600✓
• d.$150, adding the two numbers instead of multiplying them

Capacity fee = $30 x 120 DFU = $3,600. Utility capacity/impact fees are often tied to the drainage fixture-unit load a building imposes on the public system. An accurate DFU count is needed both for pipe sizing and for the correct fee.Sewer/impact fees

During plan review, when is a backwater valve flagged as required?

• a.Only after the certificate of occupancy has already been issued
• b.For fixtures below the upstream sewer manhole level✓
• c.Backwater valves are never a subject of any plumbing plan review
• d.Backwater valves are not a code item and are never required

Plan review checks for backwater-valve protection where fixtures drain below the level of the next upstream manhole and could be flooded by a sewer surcharge, per UPC/IPC. Only the low fixtures drain through the valve so upper fixtures are not blocked when it closes. Catching this at review avoids field changes.Plan review

How is the water meter size determined for a new building?

• a.No coordination with the water utility is needed for the meter
• b.By coordinating demand with the water purveyor✓
• c.The plumbing contractor sets the water rates and the meter size
• d.Any meter size will fit any building without further consideration

Meter and service sizing is coordinated with the water purveyor based on the calculated peak demand (fixture units converted to gpm) and available main pressure. The utility owns the meter and tap and confirms the size. The contractor does not set utility rates or unilaterally choose the tap.Coordination

What does a contractor's general liability insurance primarily cover?

• a.Employee on-the-job injuries, which are its main coverage purpose
• b.Only the contractor's own hand tools and equipment on the job
• c.Third-party bodily injury and property damage✓
• d.Nothing of substance; the coverage is optional and rarely used

General liability covers claims by third parties for bodily injury or property damage caused by the contractor's operations, such as water damage from a failed connection. Employee injuries are covered by workers' compensation, a separate policy. Both are typically required to hold a license.Business law

Why do contractors add a contingency to a bid?

• a.Contingencies are never added to any construction bid or estimate
• b.To deliberately ignore all project risk when preparing the bid
• c.So the contractor can bill unlimited extras without any notice
• d.To cover unforeseen conditions and risk✓

A contingency is a reasonable allowance in the estimate for unforeseen conditions (hidden damage, code surprises) so the contractor is not driven to a loss by normal uncertainty. It is separate from change orders, which cover owner-directed scope changes. Sound estimating quantifies and prices risk.Estimating

A plumber works 8 hours of overtime at 1.5 times a $40 base rate. What is the overtime labor cost?

• a.$320, using the straight base rate with no overtime premium
• b.$240, taking only the premium portion of the overtime pay
• c.$600, applying a double-time multiplier instead of time-and-a-half
• d.$480✓

Overtime cost = 8 hr x $40 x 1.5 = $480. Overtime is paid at the premium multiplier (here time-and-a-half) above the base rate, per wage-and-hour law. Estimating labor must account for premium hours so the bid covers actual payroll.Business math

How are capital equipment purchases (such as a service van) generally treated for the business?

• a.Never deductible in any form as a business operating cost
• b.Provided free of charge to contractors by the licensing board
• c.Depreciated over the useful life✓
• d.Expensed only in the year the equipment is eventually sold off

Capital equipment is a business asset whose cost is recovered through depreciation over its useful life, rather than expensed all at once (subject to tax rules that may allow accelerated write-offs). This spreads the cost against the revenue it helps generate. Consumables, by contrast, are expensed as used.Business practice

What is the master plumber's core supervisory duty on a permitted job?

• a.No responsibility at all for the work performed by the crew members
• b.Responsibility only for the work done with the master's own hands
• c.Ensure all work under the license meets code✓
• d.Responsibility that shifts entirely to the AHJ after permit issuance

As the responsible licensee, the master must ensure that the work of every journeyman, apprentice, and subcontractor under the permit meets the approved plans and code. This oversight is the reason the master, not each individual worker, holds the permit. The AHJ inspects but does not assume that responsibility.Responsibility

How can a consumer pursue a complaint against a licensed plumbing contractor?

• a.There is no recourse of any kind against a licensed contractor
• b.OSHA handles all consumer complaints about plumbing workmanship
• c.The only possible option is to file a lawsuit in civil court
• d.File a complaint with the licensing board✓

Consumers can file a complaint with the licensing board, which can investigate and impose discipline (fines, suspension, revocation) and sometimes order restitution or a bond claim. This is in addition to any civil suit. OSHA addresses worker safety, not consumer complaints about workmanship.Consumer protection

What is the consequence of performing plumbing work while the master license has lapsed?

• a.A five-year automatic grace period covers all lapsed licenses
• b.Lapsed-license work is fully allowed if the plumber is experienced
• c.There is no penalty of any kind for working on a lapsed license
• d.It is unlicensed work subject to penalties✓

Working on a lapsed or expired license is performing unlicensed work, a violation that can bring fines, disciplinary action, and voided permits, regardless of the plumber's experience. Renewal (with any required CE) must be completed before work continues. Experience does not substitute for a current license.Licensing

Before a protective system is selected for a trench, who classifies the soil, and on what basis?

• a.A competent person, using site tests and conditions✓
• b.An off-site engineer who never actually visits the excavation
• c.No one; soil classification is not required before trench work
• d.It is based on the trench depth alone, with no soil analysis

OSHA 1926 Subpart P requires a competent person on site to classify soil as Type A, B, or C using visual and manual analysis, because the class sets the allowable slope and shoring. Depth alone does not determine soil type. The classification can change after rain or with layered soils.29 CFR 1926 Subpart P

What is the maximum allowable slope for Type A soil using simple sloping?

• a.0.75 to 1✓
• b.0.5 to 1
• c.1 to 1
• d.1.5 to 1

OSHA App B to Subpart P allows Type A soil to be sloped no steeper than 0.75:1 (horizontal:vertical), about 53 degrees. Type B is 1:1 (45 degrees) and Type C is 1.5:1 (about 34 degrees). The more stable the soil, the steeper the permitted slope.29 CFR 1926 App B

A trench 8 ft deep in Type A soil is sloped at 0.75 to 1. How far back does the top extend beyond the bottom on each side?

• a.4 ft, using a 0.5-to-1 slope steeper than the code allows
• b.6 ft✓
• c.8 ft, using a 1-to-1 Type B slope instead of Type A
• d.12 ft, using a 1.5-to-1 Type C slope instead of Type A

Horizontal run = slope ratio x depth = 0.75 x 8 = 6 ft on each side, per OSHA App B. Steeper Type A slopes need less width than Type B (1:1, 8 ft) or Type C (1.5:1, 12 ft) at the same depth. The soil class therefore drives excavation width and spoil space.29 CFR 1926 App B

Benching as a protective method has a soil-type restriction. In which soil is benching NOT permitted?

• a.Type A soil, the most stable of the soil classifications
• b.Type B soil, an intermediate stability soil classification
• c.Type C soil✓
• d.Benching is banned entirely in every soil type and depth

OSHA prohibits benching in Type C soil because it is too unstable to hold vertical bench faces; benching is allowed only in Type A and B soils. Type C must be sloped, shored, or shielded instead. Using the wrong method for the soil class is a leading cause of cave-ins.29 CFR 1926 App B

How far back from a trench edge must excavated spoil and materials be kept?

• a.Right at the edge is acceptable if the spoil pile is small
• b.5 ft from the edge
• c.At least 2 ft✓
• d.1 ft from the edge

OSHA 1926.651 requires spoil piles, equipment, and materials to be set back at least 2 ft from the trench edge, or be retained, so their surcharge load does not collapse the wall or roll in on workers. On deeper or unstable trenches a greater setback may be needed. The competent person confirms it.29 CFR 1926.651

When a trench box (shield) is used, what rule governs the workers?

• a.The shield eliminates the need for any ladder egress from the trench
• b.They may work outside the shield if they move quickly enough
• c.The shield replaces the need to classify the soil beforehand
• d.They must stay within the shield's protection✓

OSHA requires workers to stay within the protected zone of a trench shield; the box protects only the space it encloses. Workers must not be in the trench outside the box or while it is being moved. Egress (a ladder within 25 ft) is still required, and soil is still classified to rate the shield.29 CFR 1926.652

How often must a competent person inspect an excavation for hazards?

• a.Daily before each shift, and after rain or hazards✓
• b.Only one time, at the very start of the excavation work
• c.Once a week is sufficient for any open excavation on the site
• d.Inspections of the excavation are not required by the standard

OSHA 1926.651 requires a competent person to inspect excavations, adjacent areas, and protective systems daily before each shift and after any event (like rain) that could increase hazards. If a hazard is found, workers are removed until it is corrected. Conditions change quickly in open ground.29 CFR 1926.651

Water is accumulating in a trench where a plumber must work. What does OSHA require?

• a.Enter wearing rubber boots and simply continue the work anyway
• b.Do not enter until the water hazard is controlled✓
• c.Ignore the standing water because it poses no additional hazard
• d.Standing water in a trench actually increases the wall stability

OSHA prohibits work in trenches with accumulating water unless the hazard is controlled by dewatering, diversion, or special support and monitoring by a competent person. Water saturates and destabilizes the walls, raising cave-in risk. Standing water also hides hazards and can rise quickly.29 CFR 1926.651

Before excavating for a sewer or water line, what must be done about underground utilities?

• a.Have them located and marked (call 811) first✓
• b.Locating buried utilities before excavation is entirely optional
• c.Dig first, and only check for utilities if a line is struck
• d.Underground utilities locate and mark themselves automatically

One-call/811 damage-prevention laws require notifying utilities so they mark buried lines before excavation, and OSHA 1926.651 requires determining the location of underground installations. Striking a gas, electric, or water line can be fatal. Hand-digging (potholing) is used near marked lines.Utility damage prevention

What must a permit-required confined-space entry permit document before entry?

• a.Tested atmosphere, personnel, and rescue provisions✓
• b.Only the calendar date on which the entry will take place
• c.Only the names of the entrants who will go into the space
• d.Nothing needs to be documented before a confined-space entry

OSHA 1910.146 requires the entry permit to record atmospheric test results, the entrant(s) and attendant, hazards, control measures, and rescue arrangements before entry. The permit is the documented go/no-go authorization. Incomplete permits are a common finding when confined-space incidents are investigated.29 CFR 1910.146

In what order must a confined-space atmosphere be tested before entry?

• a.Flammability first, then oxygen, then the toxic contaminants
• b.Toxics first, then oxygen, then flammable gases and vapors
• c.Any order at all is acceptable when testing the atmosphere
• d.Oxygen, then flammables, then toxics✓

OSHA 1910.146 requires testing in the sequence oxygen, flammability, then toxicity, because meters for flammability and toxics rely on a normal oxygen level to read correctly. An oxygen-deficient or enriched atmosphere would give false flammability readings. The space is re-tested during occupancy.29 CFR 1910.146

What oxygen concentration range is acceptable for confined-space entry?

• a.16 percent to 25 percent, a wider range than OSHA allows
• b.Exactly 21 percent only, with no tolerance in either direction
• c.10 percent to 30 percent, far outside the acceptable limits
• d.19.5 percent to 23.5 percent✓

OSHA 1910.146 sets the acceptable oxygen range at 19.5% (deficient below) to 23.5% (enriched above). Below 19.5% causes impairment and unconsciousness; above 23.5% dramatically increases fire risk. Readings outside this range require ventilation and retesting before entry.29 CFR 1910.146

At what level of flammable atmosphere must workers evacuate a confined space?

• a.10 percent of the lower explosive limit (LEL)✓
• b.50 percent of the LEL is acceptable to keep working in the space
• c.There is no flammability action level for confined-space work
• d.Only at 100 percent of the LEL, right at the explosive threshold

OSHA treats 10% of the LEL as the action/evacuation threshold for a confined space, providing a wide safety margin below the explosive range. A rising reading signals an accumulating flammable atmosphere from sewer gas or solvents. Ventilation must reduce it before work resumes.29 CFR 1910.146

Hydrogen sulfide (H2S) is a common sewer hazard. Why is odor unreliable at dangerous levels?

• a.H2S is always strongly detectable by odor at every concentration
• b.H2S has a sweet, pleasant smell that warns workers effectively
• c.H2S is completely harmless and needs no atmospheric monitoring
• d.At high levels it deadens the sense of smell✓

H2S has a rotten-egg odor at low levels but paralyzes the sense of smell at higher, more dangerous concentrations, so workers cannot rely on odor. It is also flammable and rapidly lethal. Continuous instrument monitoring, not smell, protects entrants in sewers and manholes.Confined space hazard

How must ventilation be handled during confined-space work in a sewer or manhole?

• a.Maintained continuously while the space is occupied✓
• b.Ventilate one time before entry and then shut the fan off
• c.Ventilation of an occupied confined space is not necessary
• d.Ventilate only if the workers happen to notice a strong odor

OSHA 1910.146 requires continuous forced-air ventilation during occupancy where hazardous atmospheres can develop, along with ongoing monitoring. A single pre-entry purge is not enough because gases can accumulate again from the sewer flow. Loss of ventilation is cause to evacuate.29 CFR 1910.146

What rescue method is preferred for a worker in a permit-required confined space?

• a.An untrained coworker entering the space to pull the victim out
• b.Waiting to call 911 with no other rescue plan in place at all
• c.Non-entry retrieval with a harness and line✓
• d.No rescue plan is needed for a routine confined-space entry

OSHA 1910.146 requires rescue provisions and favors non-entry retrieval (harness, retrieval line, and tripod/winch) so a downed entrant can be recovered without a rescuer entering. Untrained would-be rescuers who enter are a leading cause of multiple-fatality confined-space incidents.29 CFR 1910.146

At what height does OSHA require fall protection in construction work?

• a.10 ft
• b.6 ft above a lower level✓
• c.4 ft
• d.Fall protection is never required for plumbers on a job site

OSHA 1926.501 sets the general construction fall-protection trigger at 6 ft above a lower level, using guardrails, personal fall arrest, or safety nets. Plumbers on roofs, elevated work, or open excavations are covered. Scaffolds use a 10 ft trigger under a different standard.29 CFR 1926.501

An extension ladder reaches a roof to set a vent terminal. How far must it extend above the landing?

• a.6 in above the edge, far short of the required extension
• b.Flush with the roof edge, leaving no handhold at the top
• c.At least 3 ft above the landing✓
• d.1 ft above the edge, which is below the code requirement

OSHA 1926.1053 requires a ladder to extend at least 3 ft above the upper landing (or be secured with a grab rail) so a worker has a handhold when transitioning on and off. Setting the top flush with the edge removes the handhold and invites a fall. The ladder is also set at the 4:1 angle.29 CFR 1926.1053

What PPE is appropriate for handling acidic or caustic drain-cleaning chemicals?

• a.Ordinary cotton work gloves, which are adequate for the acids
• b.Ordinary sunglasses in place of chemical splash goggles
• c.No personal protective equipment at all for short exposures
• d.Chemical-resistant gloves, eye protection, and an apron✓

Acidic and caustic drain cleaners can cause severe chemical burns and eye injury, so hazard-communication and PPE rules call for chemical-resistant gloves, eye/face protection, and an apron. The product's Safety Data Sheet lists the required PPE. Cotton gloves and sunglasses provide no real protection.Hazard Communication

Concentrated sulfuric-acid drain openers pose what hazard, and what must be available?

• a.No hazard at all; these products need no special precautions
• b.Drinking a glass of water neutralizes any chemical exposure
• c.They should be poured into the drain as fast as possible
• d.A violent exothermic reaction; provide flushing water✓

Strong-acid drain cleaners react exothermically with water and other chemicals, releasing heat and splashing, so an eyewash or flushing water and proper PPE are essential. They must be added slowly and never mixed with other cleaners (which can release toxic gas). The SDS gives first-aid steps.Chemical safety

After brazing or soldering (hot work) is finished, how long must a fire watch be maintained?

• a.About 5 seconds after the torch is set down is sufficient
• b.No fire watch is needed after brazing or soldering is complete
• c.The fire watch may leave immediately once the work is done
• d.At least 30 minutes✓

OSHA 1926.352 requires a fire watch during hot work and for at least 30 minutes afterward, because sparks and conducted heat can smolder in hidden combustibles and flare up after the crew leaves. The watch has an extinguisher and monitors the area. Hot-work permits formalize these controls.29 CFR 1926.352

How must oxygen and fuel-gas (acetylene) cylinders be separated in storage?

• a.Laid flat and unsecured on the ground beside the work area
• b.By 20 ft or a rated noncombustible barrier✓
• c.Stored right next to each other for convenient access on the job
• d.Kept close to a heat source so the regulators do not freeze up

OSHA 1926.350 requires oxygen and fuel-gas cylinders in storage to be separated by 20 ft or by a 5 ft noncombustible barrier with a half-hour fire rating. Cylinders are stored upright, secured, and capped, away from heat. Keeping fuel and oxidizer apart limits fire and explosion risk.29 CFR 1926.350

What device prevents flame from traveling back into oxy-fuel torch hoses or regulators?

• a.Simply removing the regulators from the cylinders before use
• b.Flashback arrestors✓
• c.Extra layers of tape wrapped around the hose fittings
• d.No device is needed on an oxy-fuel torch set for brazing

Flashback arrestors on the torch/regulator connections stop a flame front and reverse gas flow from traveling back into the hoses and regulators, preventing an explosion. They complement check valves. This is standard practice for oxy-acetylene brazing of copper and cast iron.Torch safety

Who is permitted to test a backflow-prevention assembly after installation?

• a.A certified backflow-assembly tester✓
• b.Any plumber on the job, whether certified for backflow or not
• c.The building owner, using the assembly's built-in test cocks
• d.Only the code official is allowed to test a backflow assembly

Backflow assemblies must be tested by a certified backflow tester using calibrated gauges, and the passing report is filed with the water purveyor, per UPC/cross-connection-control programs. Certification ensures the tester follows the correct procedure. Installation alone does not prove the device functions.UPC §603 / cross-connection

A threaded hose bibb (sillcock) is a common low-hazard cross-connection. What minimum protection is required?

• a.A hose-bibb vacuum breaker✓
• b.A simple check valve alone, with no atmospheric vent provided
• c.An air gap, which cannot actually be provided at a hose bibb
• d.No protection is required on an ordinary threaded hose bibb

A hose bibb can create backsiphonage if a hose is left in a pool, bucket, or chemical, so a hose-bibb vacuum breaker is required to admit air and break the siphon. It is a simple, code-required device. A plain check valve does not provide the atmospheric vent that prevents backsiphonage.UPC §603 / cross-connection

To prevent scalding at bathing and handwashing fixtures, hot water is typically limited to what temperature?

• a.About 180 F, which would cause severe scalds almost instantly
• b.About 120 F✓
• c.About 100 F as a required maximum at every plumbing fixture
• d.No temperature limit applies to hot water at plumbing fixtures

To prevent scald injuries, plumbing standards limit delivered hot water at bathing and handwashing fixtures to roughly 120 F using tempering or thermostatic mixing valves. Even higher stored temperatures are blended down before delivery. Water above about 120 F can scald quickly, especially children.Scald prevention

How is stored hot water managed to control Legionella while preventing scalds at the tap?

• a.Store the water cold and heat it only at the point of use
• b.Store the water at about 100 F throughout the whole system
• c.Store hot (~140 F) and temper down for delivery✓
• d.Water temperature has no effect on Legionella growth at all

Legionella proliferates in warm water and is suppressed at storage temperatures at or above about 140 F, so systems store hot and use a thermostatic mixing valve to deliver safe ~120 F water. Storing at lukewarm temperatures (near 100 F) instead promotes bacterial growth. This balances scald safety against a real health hazard.Legionella control

Before cutting into an active sanitary drain line, what flammable-gas hazard must be considered?

• a.There is no gas hazard present inside active sanitary drain lines
• b.Methane (sewer gas) is flammable✓
• c.Sewer gas is completely inert and poses no flammability hazard
• d.A torch flame is a safe and accepted way to check for the gas

Sewer systems can contain methane, which is flammable and explosive, along with toxic hydrogen sulfide, so lines are ventilated and ignition sources removed before cutting or hot work near them. A flame must never be used to check for gas. These are the same hazards that make sewers confined spaces.Confined space / gas hazard

What electrical protection is required for portable electric tools on a construction site?

• a.Ground-fault protection only for tools used indoors, never outdoors
• b.Ungrounded extension cords are acceptable for portable tools
• c.GFCI protection✓
• d.No ground-fault protection is needed on a construction job site

OSHA 1926.404 requires GFCI protection (or an assured equipment grounding conductor program) for 120-volt receptacles used with portable tools on construction sites, because wet and grounded conditions raise shock risk. Plumbers around water are especially exposed. Damaged or ungrounded cords must be removed from service.29 CFR 1926.404

Why is extra caution required when using electrical equipment in wet locations?

• a.There is no added electrical risk when working in wet areas
• b.Water insulates the worker and reduces the risk of shock
• c.Ungrounded equipment is actually safer to use near water
• d.Water sharply increases shock and electrocution risk✓

Water lowers body resistance and provides a path to ground, so shock and electrocution risk rises sharply in wet locations; equipment must be grounded and GFCI-protected and cords kept out of standing water. Plumbers routinely work in these conditions. Never assume water insulates against electricity.Electrical safety

What is the safe practice for handling heavy pipe, fittings, or fixtures over about 50 lb?

• a.Always lift alone, regardless of how heavy the item is
• b.There is no weight at which a team lift or aid is needed
• c.Use proper technique and mechanical aids or help✓
• d.Lift quickly using the back to get the movement over with

Manual-handling guidance calls for team lifts or mechanical aids (dollies, hoists) and proper technique (lifting with the legs, keeping the load close) for heavy items to prevent musculoskeletal and back injuries. Cast-iron pipe and fixtures are frequent culprits. Rushing or solo lifting overloaded weights causes chronic injury.Ergonomics / material handling

When cutting cast-iron pipe with a snap (soil-pipe) cutter, what precautions apply?

• a.Snap the pipe by hand instead of using the cutter tool
• b.Face the cutting chain directly with no protection at all
• c.No PPE is needed when using a soil-pipe snap cutter tool
• d.Wear eye protection and avoid pinch points✓

Snap cutters exert high force and can throw chips and pinch or crush hands, so eye protection and careful hand placement are required. The pipe should be supported and the operator positioned to avoid the pinch zone. Cast-iron fragments are sharp and can cause eye injury without protection.Tool safety

Before an employee uses a tight-fitting respirator, what is required?

• a.A medical evaluation and a fit test✓
• b.Any mask may simply be picked up and worn with no preparation
• c.Fit testing is unnecessary for a tight-fitting respirator device
• d.A beard is acceptable at the seal of a tight-fitting respirator

OSHA 1910.134 requires medical clearance and a fit test before an employee uses a tight-fitting respirator, plus training and a written program where respirators are required. Facial hair at the seal prevents an adequate fit and is not permitted with tight-fitting respirators. This ensures it actually protects the wearer.29 CFR 1910.134

What does the OSHA respirable crystalline silica standard require the employer to have?

• a.A written exposure control plan✓
• b.No plan of any kind is required under the silica standard
• c.A plan only for demolition work, not for plumbing tasks
• d.Only a verbal reminder given to workers about the dust hazard

OSHA 1926.1153 requires a written exposure control plan describing silica-generating tasks (cutting concrete, cast iron, masonry), the engineering controls and work practices used, and housekeeping. Water suppression or on-tool dust collection are primary controls. It applies to plumbing tasks that generate silica dust.29 CFR 1926.1153

A plumber suspects asbestos in old pipe insulation during a renovation. What is the correct action?

• a.Stop and use licensed abatement; do not disturb it✓
• b.Ignore it entirely and continue working through the material
• c.Remove it personally and throw it in the regular jobsite trash
• d.Wet it down and toss it out with the ordinary demolition debris

Suspected asbestos-containing materials (pipe lagging, transite, old sheet goods) must not be disturbed by untrained workers; licensed abatement with containment, wetting, and proper disposal and notification is required. Disturbing asbestos releases fibers that cause serious lung disease. Regular trash disposal is unlawful for it.Asbestos safety