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1. Science 2. Engineering 3. Civil Engineering NASCLA Sample Exam Questions With Correct Answers 2026 Which of the following is included in a company's general overhead costs? Performance Bonds Withholding Taxes Costs for equipment purchase and rentals The company's administrative expenses - Correct Answer-The company's administrative expenses What is the purpose of ventilating unconditioned spaces? To control moisture Dehumidification Control oxygen levels Temperature Control - Correct Answer-To control moisture Oxygen Cylinders shall be stored: Separate from fuel gas cylinders a minimum of 10 ft Separate from fuel gas cylinders a minimum of 20 ft In a centrally located air tight closet In a storage locker - Correct Answer-Separate from fuel gas cylinders a minimum of 20 ft What size diameter anchor bolts should open web joists have at each end? 11/2" 21/2" 31/2" 4 1/2" - Correct Answer-2 1/2" When should duplex nails be used? When building concrete forms When framing walls When constructing cabinets When applying shingles - Correct Answer-When building concrete forms Where would the contractor find details of wall penetrations that are to be constructed as a part of the project? Technical specifications Supplemental conditions General conditions Bid request documents - Correct Answer-Technical specifications Trades that typically have the most stringent and specialized coordination requirements for project closeout are : Concrete and masonry Mechanical and electrical Drywall and painting 2 feet 2.5 feet - Correct Answer-2 feet When storing steel joists at a job site they should be Protected from weather Close to the area where they are being used Vertical, right side up Vertical, laid flat, or as shipped - Correct Answer-Vertical, laid flat, or as shippied An installed truss has a 20 foot span and a depth of 6 feet. What is the maximum amount it can be out of plumb? 1.5 inches 1.75 inches 2 inches 2.5 inches - Correct Answer-1.5 inches What does the term retainage mean? Amount not yet paid to a subcontractor by the primary contractor The amount remaining to be billed on a project The value of work that has been rejected by the owner A percentage of the progress payment withheld by the owner - Correct Answer-A percentage of the progress payment withheld by the owner The space between the insulation and the roof sheathing of a sloped ceiling shall be a minimum of how much? No space 1/2 inch 1 inch 1 1/2 inch - Correct Answer-1 in Whenever polyethylene is used under a slab as a moisture barrier, its joints should overlap a minimum of how many inches 2 4 6 8 - Correct Answer-6 Roughly how much construction waste would be generated during the new construction of 25000 square foot office space? 10000 pounds 25000 pounds 50000 pounds 100000 pounds - Correct Answer-100000 pounds The EPA requires a contractor to create a storm water pollution plan when which of the following is true? When a project disturbs one or more acres When a project disturbs two or more acres When the project will have runoff entering public water systems When the project is publicly funded - Correct Answer-When a project disturbs one or more acres 75 persons - Correct Answer-50 persons Wallboard inspections must be made when? Before the joints are taped. At the same time as the framing inspection When fasteners and joints have been covered After the building is ready for occupancy - Correct Answer-Before the joints are taped. Which of the following would be an acceptable condition for a contractor to refuse to perform work on a project and not be a breach of contract? A site condition that prohibits the subcontractor from performing the work A progress payment that was more than three days late The project schedule was extended by a change order The contractor failed a building inspection - Correct Answer-A site condition that prohibits the subcontractor from performing the work What method of disbursement account would be the most appropriate for a large construction company? Establish a general ledger account with numbers starting in the 500s Establish a general ledger account with number starting in the 300s Establish a separate journal for disbursements and payroll Establish a combined journal for disbursements and payroll - Correct Answer- Establish a separate journal for disbursements and payroll Who is responsible for the maintenance of personal protective equipment when employees provide their own? The employee The employer The equipment manufacturer OSHA - Correct Answer-The employer According to OSHA a radiant type temporary room heater used in a confined. space must have how much clearance from the sides and rear of the space? 12 inches 18 inches 24 inches 36 inches - Correct Answer-36 inches The owner will require documentation that provides information as to how the project was actually constructed. Which of the following is provided by the contractors for this purpose? As built drawings Certificate of substantial completion Unconditional lien release Project logs - Correct Answer-As built drawings Who has the authority to change or adjust a shoring method of an excavation? An employee The contractor A competent person None is required 2 to 3 days 4 to 5 days At least 7 days - Correct Answer-4 to 5 days Which type of masonry joint finish is the most effective at preventing damage from freezing? Extruded Flush Concave Raked - Correct Answer-Concave When constructing a light weight curtain wall, what shall be between the building insulation and the external panels? Air gap Steel mullions Moisture barrier Vapor retarders - Correct Answer-Air gap Which one of the following has the greatest impact on determining how to safely manage traffic control at a job site? The building codes Site layout Size of equipment OSHA requirements - Correct Answer-Site layout A project schedule of values shows Task A worth $12000, task B worth $8500, and task C worth $25000. Task A is 18 percent complete, Task B is 2 percent complete, Task C is 7 percent complete. How much should the progress payment be? $12000 $5600 $4080 $1750 - Correct Answer-$4080 Guard rails and personal fall arrest systems shall be provided whenever platforms and walk ways cannot feasibly be how wide? 12 inches 18 inches 24 inches 32 inches - Correct Answer-18 inches What screw size is to be used to fasten metal decking? Number 8s or 1/8 inch diameter Number 10s or 3/16 inch diameter Number 12s or 1/4 inch diameter Number 14s or 5/16 inch diameter - Correct Answer-Number 12s or 1/4 inch diameter A surveying benchmark is at 88.6 feet. There is a reference stake set 7.8 feet lower than the benchmark. If a ditch is to be excavated to a depth of 875 feet below the reference stake and 20 feet from the reference stake, what is the finished elevation of the bottom of the ditch? When may compressed air be used to clean dust from equipment Only when the pressure is reduced to 50 psi maximum and personal protective equipment is on place Only when the pressure is reduced to 30 psi or less and personal protective equipment is provided. Never Only when the pressure is reduced to less than 45 psi - Correct Answer-Only when the pressure is reduced to 30 psi or less and personal protective equipment is provided Which of the following documents are primarily used by the contractor and architect to monitor quality? Construction drawings Contract addenda Meeting Minutes Submittals, shop drawings, and samples - Correct Answer-Submittals, shop drawings, and samples In order to protect the owner and contractor from lien filings, what document is provided by a subcontractor in exchange for final payment? Partial lien release Unconditional lien release Conditional lien release Notice of completion - Correct Answer-unconditional lien release What does a lien waiver release the owner from? Paying the contractor for extra services Paying twice for services or materials The right to claim a lien Needing to file a notice of commencement - Correct Answer-paying twice for services or materials A renovation project is to begin on a pre-1978 housing project. It will require that more than 2 square feet of painting surface be removed and disturbed. What should the contractor do prior to beginning? -Distribute an EPA pamphlet entitled "Protect your family from lead in your home" to the property owner or adult occupant -Submit a lead abatement notice to the EPA within 5 days of starting the project -Notify the owner and tenants of the project start Inform the local health department of the project schedule - Correct Answer- Distribute an EPA pamphlet entitled " Protect your family from lead in your home" to the property owner or adult occupant Which of the following is not a concern for a precast concrete contractor during a reconstruction meeting? Field layout and verification Developing an erection plan Maintaining anticipated overhead and profit margins Determining site conditions - Correct Answer-Maintaining anticipated overhead and profit margins The international building code states that the minimum thickness of plywood. species group | that may be used for subfloor joists spaced 16 inches on center is : Which one of the following is considered project overhead? Equipment rental Advertising Cost Material Delivery charges Temporary job site office - Correct Answer-Temporary job site office When unloading trusses what should a builder do Lift with chokers Break the banding Unload as close as possible to the building site Lift trusses by the band straps - Correct Answer-Unload as close as possible to the building site Which one of the following is not appropriate eye protection for employees who wear spectacles with corrective lenses? Corrective lenses worn inside goggles Spectacles with lenses that are corrective and protective Corrective spectacles only Protective goggles worn over corrective spectacles - Correct Answer-Corrective spectacles only When an internal combustion engine is used indoors what must be done? The engine must be propane powered The exhaust gases must be vented outside Tt must be an OSHA approved system It is not allowed to do this - Correct Answer-The exhaust gases must be vented outside Which of the following is true regarding elevator floor control buttons -They must be arranged in a standard telephone pattern -They must be located 48 inches above the finished floor maximum -They must be located 52 inches above the finished floor maximum -They must be located 16 inches above the floor minimum and to the right of the door opening - Correct Answer-They must be arranged in a standard telephone pattern if an incident results in the death of a worker, what is the maximum amount of time it must be reported to OSHA? 4hrs 8 hrs 24 hrs 72 hrs - Correct Answer-8 hrs What is the maximum installation interval that foundation plates or sills should be installed? 6 ft 8 ft 10 fe 12 ft - Correct Answer-6 ft What is the most effective method to move material a short distance downgrade? Which gauge of metal stud is the most cost efficient to be used in a non-load bearing partitions? 25 ga 22 ga 20 ga 33 ga - Correct Answer-25 ga What is the suggested angle of repose for shoring compacted sharp sand? 1/231 1:1 11/2:1 2:1 - Correct Answer-1 1/2:1 A deck is required to have a guard rail when? -When the steps to the deck have more than two risers -When the deck is more than 24 inches above grade -When the deck is more than 30 inches above grade -All decks are required to have guard rails - Correct Answer-When the deck is more than 30 inches above grade A job requiring excavating initially calculated to allow for a 10% swell factor for the soil. However during excavation it was found that the soil had a 25% actual swell factor. What effect will this have on the overall project? -There is no effect -This will require more hauling and decrease in efficiency -This will require less hauling and increase in efficiency -The contract will need to be modified with a scope change - Correct Answer-This will require more hauling and decrease in efficiency A non-sliding egress door of a group R-3 occupancy building shall have a maximum threshold height of ? 3/8 inch 1/2 inch 5/8 inch 3/4 inch - Correct Answer-1/2 inch Personal all arrest systems and guardrails shall be installed or provided when walkways and platforms are a minimum of how wide? 12in 18 in 24 in 36 in - Correct Answer-18 in A parking lot with 30 spaces shall have a minimum of how many handicapped spaces? 1 2 3 4 - Correct Answer-2 Which formula describes a balance sheet? -Assets=liabilities+owners equity 
