NASCLA Commercial Building Exam Questions and Answers, Exams of Building and Prefabrication

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Questions and Answers

What is the minimum ceiling height for means of Egress? - correct answer ✅Not less than 7 feet 6 inches Emergency Power must illuminate for how long? - correct answer ✅No less than 90 minutes Elevators are required in a building with how many stories? - correct answer ✅More than 3 (or at least 4). What is the size of the refuge space for one wheel chair? - correct answer ✅30 inches by 48 inches Each area of refuge shall be separated from the remainder of the story by what? - correct answer ✅Smoke Barrier What is the minimum width of a door? - correct answer ✅32 Inches The minimum clear opening height of doors shall be no less than (at least) - correct answer ✅80 inches

Questions and Answers

Which direction should a hinge door swing when the building occupies more than 50 people or is classified as Group "H"? - correct answer ✅In the direction of egress The force for pushing or pulling open interior swinging egress non fire doors shall not exceed how many pounds? - correct answer ✅No more than 5LBS Clear opening below a door should be no more than - correct answer ✅4 inches Panic hardware is required when - correct answer ✅There are more than 50 possible occupants The maximum unlatching force of panic or fire hardware should not exceed how many pounds? - correct answer ✅15lbs Stairway width for less than 50 people is - correct answer ✅36 inches Stairway width for more than 50 people - correct answer ✅44 inches

Questions and Answers

Handrails should extend passed the top riser by - correct answer ✅12 inches Maximum handrail width is - correct answer ✅2 inches Where handrails are not continuous between flights, the handrails should extend horizontally how many inches? - correct answer ✅12 inches Clear space between handrail and wall - correct answer ✅1 1/ Required guards shall not have an opening how large? - correct answer ✅4 inches Corridor width chart can be found in what book? - correct answer ✅2018 IBC (Thick blue book) page 287 Emergency escape and rescue openings shall have the bottom of the opening not greater than how many inches? - correct answer ✅44 inches measure from floor

Questions and Answers

Accessible parking Spaces chart can be found where? - correct answer ✅2018 IBC Page 308 Net Free Ventilating area shall not be less than - correct answer ✅1/150th of the area of the space ventilated (Page 321 IBC) The spacing of the ties or fastenings for exterior metal veneer shall not exceed how many inches? - correct answer ✅24 inches Lap siding should have minimum lap of how many inches? - correct answer ✅1 and 1/4 inches Metal flashing on walls, roof intersections, no less than how thick? - correct answer ✅0. What class assemblies are most effective against severe fire test? - correct answer ✅Class A Asphalt shingles should only be used on roof slopes - correct answer ✅Of two units vertical in 12 units horizontal (17%)

Questions and Answers

Valley lining material thickness chart can be found where? - correct answer ✅IBC 351 Wood Shake and Wood shingle exposure table - correct answer ✅IBC 352 Minimum Slope of a roof is - correct answer ✅1/4 : 1 Allowable deflection table can be found - correct answer ✅IBC 363 A geotechnical investigation must be conducted when: - correct answer ✅When backfilling more than 12inches under a footer The grade away from a building must be - correct answer ✅5% for at least 10 feet Dampproofing must be applied from where? - correct answer ✅Footer to above grade

Questions and Answers

Where should a foundation drain be placed? - correct answer ✅Top of the drain at least 6 inches above the top of the footing, filter fabric over stone Sandy, silty sand, clayey, table - found where? - correct answer ✅434 IBC Backfill compressive strength has to be what PSI? - correct answer ✅At least 2000 PSI Minimum Depth of footings below undisturbed ground surface should be how deep? - correct answer ✅12 inches Minimum width of footing is - correct answer ✅12 inches Flange projections shall not exceed what dimension? - correct answer ✅14 times the minimum thickness of metal and flange width shall not be less than 80% of the depth of the section How thick should a vapor barrier be below a slab? - correct answer ✅6 mil (0.006) lapped at least 6 inches

Questions and Answers

Chimney termination is at least how far above the highest point of the roof? - correct answer ✅3 feet What plan is submitted to the engineer? - correct answer ✅Design (construction documents) Steel Joist placement plans do not require what - correct answer ✅Seal and signature of the joist manufacturer Trusses spanning more than how many feet require an engineer? - correct answer ✅60ft Underlayment should be a minimum of how thick? - correct answer ✅1/4in thick At what height do you need a permit for a retaining wall? - correct answer ✅4ft What occupancy classification is a hospital? - correct answer ✅I-

Questions and Answers

Who is authorized to serve a notice of violation or revoke permit? - correct answer ✅The Building Official Fire box should be placed how far above finished floor? - correct answer ✅42-48inches Minimum temperature when applying SFRM is what - correct answer ✅40 Degrees for 24 hours Parapet shall not be less than how tall above the point where the roof surface and wall intersect? - correct answer ✅30 inches Smoke barriers most be how thick? - correct answer ✅2.5mm (.10in) Shaft enclosures shall have a fire resistance rating of not less than how long? - correct answer ✅2 hours where connecting 4 stories or more A manual actuation device shall be located at or near egress how far from cooking area? - correct answer ✅10-20ft

Questions and Answers

Back flow preventer valves shall be monitored how? - correct answer ✅Tamper Switch Automatic sprinklers installed over kiosks, displays, booths, that exceed how many feet? - correct answer ✅4ft Sprinklers below deck or balcony hang maximum distance of - correct answer ✅14inches Before you occupy a structure, what fire safety must be completed? - correct answer ✅Fire protection systems tested and approved Minimum critical radiant flux is - correct answer ✅Not less than Class 1 in groups I-1 and I- Wood finished flooring can be directly embedded to fireblock - correct answer ✅ Cabinets should remain unlocked except where? - correct answer ✅I-3 (prisons)

Questions and Answers

Portable fire extinguisher should be placed where - correct answer ✅Within 30ft from commercial cooking equipment Max weight of a fire extinguisher - correct answer ✅40lbs, installed so top is not 5ft above floor Ionization smoke alarms shall not be installed how many feet from a permanently installed cooking appliance? - correct answer ✅20ft Smoke alarms shall be installed NOT less than how many horizontal feet from opening of bathroom - correct answer ✅3ft Where should smoke alarms receive power from? - correct answer ✅Primary power from building wiring with a battery backup Fire alarm boxes should be located where? - correct answer ✅No more than 5ft from entrance to exit How high should a fire alarm be placed? - correct answer ✅Lever of box 42-48 inches from floor

Questions and Answers

Group H with 50 or more people shall not be provided - correct answer ✅With a latch or lock (except panic hardware or fire hardware). Stairways within dwellings and exterior stairways shall have an illumination level on tread runs not less than - correct answer ✅1 foot candle (11 lux) Which roof assembly is most effective against severe fire exposure? - correct answer ✅Class A Roofing, shingle, shake, metal, charts can be found in - correct answer ✅IBC Cladding / Roofing Ice Barriers should be installed where - correct answer ✅Not less than 24 inches inside exterior roof line Chimney termination: - correct answer ✅3ft above where chimney passes through 2ft Higher than any portion within 10ft Sheathing span and loads: - correct answer ✅32/16 (Roof/Subfloor)

Questions and Answers

Preservative treated wood shall bear what - correct answer ✅Quality Mark of inspection agency Fasteners, connectors, in contact with preservative wood shall be coated in what - correct answer ✅Hot Dip Zinc galvanized steel, stainless steel, bronze, or copper Joists can be how far off ground - correct answer ✅18 inches (Non treated) Wood girder can be how far off ground - correct answer ✅12 inches (Treated) Untreated wood is permitted where - correct answer ✅When wood is continuously and entirely below ground water level or submerged in fresh water Foundation Plates: Bolts should be placed not more than how many feet on center? - correct answer ✅6ft

Questions and Answers

How many bolts per sill plate? - correct answer ✅At least 2. Each located not more than 12in from end of plate End of each Joist shall have at least how many inches of bearing? - correct answer ✅1 1/2 inches Notches on the end of joists shall not exceed - correct answer ✅1/4 joist depth Notches on top or bottom of Joist shall not exceed - correct answer ✅1/6 joist depth Notches in joist should not be located where - correct answer ✅Middle 3rd of joist Notches at end of rafters or ceiling joist shall not exceed - correct answer ✅1/4 joist depth Purlin Max: - correct answer ✅2x4 (4ft) 2x6 (6ft)

Questions and Answers

Skylights are set at what angle - correct answer ✅Less than 45 degrees Horizontal plane mounted less than 4 inches Glazing adjacent to door within 24inches or bottom of exposed edge less than 60 inches above walking surface shall be considered - correct answer ✅A hazardous location Glazing adjacent to stairways and ramps: Less than 60 inches is: - correct answer ✅A hazardous location Number of elevator cars in a hoist-way: - correct answer ✅No more than 4 elevator cars enclosed in single hoist- way Where two or more elevators are controlled by a common operating system, all elevators should automatically transfer to standby power within how long of normal power failure? - correct answer ✅60 seconds Escalators should have a clear width of - correct answer ✅32 inches

Questions and Answers

Plumbing systems should not be located where? - correct answer ✅In elevator equipment rooms Where should automatic sprinkler systems not be installed? - correct answer ✅Machine Rooms Elevator Machinery Spaces Control Rooms Elevator hoist ways What is the minimum sqft of an enclosed fire service access elevator lobby? - correct answer ✅150sqft with a dimension not less than 8ft AISI Standards for Cold Form Steel can be found: - correct answer ✅IBC 614 A walkway shall be provided in front of every construction site with a minimum width of how many feet? - correct answer ✅4ft What should pedestrian traffic be protected by where the walkway extends into the street? - correct answer ✅Directional Barricades

Questions and Answers

Covered walkways should have a clear height of how many feet? - correct answer ✅8ft Protection of adjoining property notice should be made at least how many days prior to scheduled start date of excavation? - correct answer ✅10 days Who assumes all obligations prescribed as employer obligations under the standards contained in OSHA? - correct answer ✅Prime Contractor The common drinking cup is - correct answer ✅Always prohibited Emergency evac plans: 10 or less employees the plan can be communicated how? - correct answer ✅Orally Safety nets should extend how far beyond edge of work surface? - correct answer ✅8ft span Within 25ft of working ledge

Questions and Answers

Safety belt lanyard shall be a minimum of how thick? - correct answer ✅1/2in nylon Max length for safety lanyard - correct answer ✅6ft Nominal breaking strength of lanyard is - correct answer ✅5400lbs Nominal dimensions of a 2x4 are - correct answer ✅2x One 2A rated fire extinguisher is required for every _____ sqft - correct answer ✅3000sqft Travel distance from any point of the protected area to nearest extinguisher is - correct answer ✅100ft max No more than how many gallons of combustible liquid should be stored in a room outside of an approved storage cabinet? - correct answer ✅25 gallons

Questions and Answers

What size access way must be within 200ft of each pile of containers - correct answer ✅12ft access way Safety devices: Valves should be arranged to afford free vent to the outer air with discharge of at least how many feet horizontally away from the building? - correct answer ✅5ft Tarps or coverings should be kept how far from combustible material? - correct answer ✅10ft Materials stored inside building under construction shall not be placed within how many feet of any hoist way or inside floor opening - correct answer ✅6ft Materials stored inside building under construction shall not be placed within how many feet of any exterior wall which does not extend above the top of the material stored - correct answer ✅10ft Bagged materials shall be stacked by stepping back the layers and cross keying the bags at least how many bags high? - correct answer ✅10 bags

Questions and Answers

When Masonry blocks are stacked higher than how many feet, the stack should be tapered back - correct answer ✅One half block per tier above the 6ft level Lumber piles should not exceed how many feet when reached with machinery - correct answer ✅20ft Lumber piles should not exceed how many feet when reached manually

correct answer ✅16ft Rigging equipment for material handling should be inspected - correct answer ✅Prior to use on each shift Wire rope should not be used if: - correct answer ✅In any length of 8 diameters, the total number of visible broken wire exceeds 10% of the total number of wires Switches: All hand held power tools must be operated with what? - correct answer ✅An on / off switch

Questions and Answers

All other hand held power tools such as circular saws and chain saws, should be equipped with what - correct answer ✅A constant pressure switch Compressed air shall not be used for cleaning except when reduced to what PSI - correct answer ✅30 PSI Who can use power actuated tools? - correct answer ✅Employees who have been trained in their operation Abrasive wheels: How strong should safety guards be? - correct answer ✅Strong enough to withstand force of the wheel breaking What is the max distance material can be dropped without a chute over an exterior - correct answer ✅20ft When debris is dropped through holes in the floors, the area onto which the material lands should be protected by what - correct answer ✅Barricades 42in high and at least 6ft out (not less than)

Questions and Answers

The following are some of the machines which usually require point of operation guarding - correct answer ✅Power saws Valve protection caps should - correct answer ✅Not be used for lifting cylinders. What water temperature should be used to thaw cylinders loose? - correct answer ✅Warm, not boiling How often should combustible gases or material be inspected? - correct answer ✅Before every working shift Shielding: Where should all arc welding and cutting operations should be shielded by noncombustible or flameproof screens which protects employees - correct answer ✅In the vicinity from the direct rays from the arc General Welding, cutting, heating, may normally be done without what? - correct answer ✅Mechanical ventilation or respiratory protective equipment Welding in confined spaces:

Questions and Answers

How should employees be protected? - correct answer ✅With airline respirators and communication Welding in confined spaces: What device should employees have when accessing a space through a manhole or other small opening? - correct answer ✅Lifeline Fenders are required on pneumatic tied earth moving equipment whose speed exceeds how many MPH? - correct answer ✅15mph All equipment used in sight clearing should have overhead covering of - correct answer ✅Not less than 1/8in steel plate or 1/4in woven wire mesh with no openings greater than 1in What is "Kickout?" - correct answer ✅Accidental release or failure of cross bracing At what depth do you need means of egress (Ladder, stairs ramp) from a trench? - correct answer ✅4ft

Questions and Answers

What is the max lateral travel in a trench to a ladder? - correct answer ✅25ft When should the atmosphere be tested in the excavation? - correct answer ✅Before employees enter an excavation more than 4ft deep What should be tested first in hazardous atmosphere? - correct answer ✅Oxygen How far should equipment be kept from excavation? - correct answer ✅2 feet When and by who should inspections of excavations be made? - correct answer ✅Daily, by a competent person When walkways for employees or equipment are required, what is the maximum depth allowed before guardrails must be erected? - correct answer ✅6ft or more Examinations of excavations of how deep must be performed by a competent person? - correct answer ✅5ft

Questions and Answers

Load per unit area at which a soil will fail in compression - correct answer ✅Unconfined compressive strength At what height should masonry walls be adequately braced to prevent overturning or collapse? - correct answer ✅8ft Employees loading, hooking, or bracing, should never be in what position to a load? - correct answer ✅Underneath At no time should there be more than how many floors or feet of unfinished bolting or welding - correct answer ✅4 floors or 48 feet Stairways and handrails on construction site: Stairways having four or more risers or rising more than 30 inches shall be equipped with - correct answer ✅At least one handrail and

Questions and Answers

One stair rail system along each unprotected side or edge How high must a ladder extend past the upper landing surface? - correct answer ✅3 feet Non self supporting ladders shall be used at an angle that the horizontal distance from the top support to the foot of the ladder is: - correct answer ✅1/4 working length of the ladder What direction should a user be facing when going up or down a ladder? - correct answer ✅Facing ladder The top step or top of a ladder should not be - correct answer ✅Used as a step What is the simplest business structure to form? - correct answer ✅Sole Proprietorship A partnership exists as long as: - correct answer ✅Partners agree it will, and as long as they stay partners