NASCLA ACCREDITED EXAM 2023-2024 ACTUAL EXAM 250
QUESTIONS AND CORRECT DETAILED ANSWERS WITH
RATIONALES (VERIFIED ANSWERS)
When masonry blocks are stacked higher than 6 feet, the stack shall be tapered back
how far? - Back one-half block per Tier above the 6-foot level
Used lumber shall have what withdrawn before stacking? - Nails
How shall lumber be stacked? - On level and solid supported sills, and stable and self
supporting
Lumber piles shall not Exceed? - 20 feet in height provided that lumber to be handled
manually shall not be stacked more than 16 feet high
Wire rope shall not be used if? - In any length of eight diameters, the total number of
visible broken wires exceeds 10 percent of the total number of wires, or if rope shows
other signs of excessive wear, corrosion, or defect
Waste materials - when materials are dropped more than 20 feet to any point lying
outside the exterior walls of the building what is needed? - An enclosed chute of wood,
or equivalent material, shall be used. Enclosed chute is a slide, closed in on all sides,
through which material is moved from a high place to a lower one
All other hand-held powered tools such as circular saws, chain saws, and percussion
tools without positive accessory holding means, shall be equipped with what? - A
constant pressure switch that will shut off the power when the pressure is released
Compressed air shall not be used for cleaning purposes except when? - Where reduced
to less than 30 p.s.i and then only with effective chip guarding and personal protective
equipment which meets the requirements. The 30 psi requirement does not apply for
concrete form, mill scale and similar cleaning purposes
Who shall be allowed to operated a powder-actuated tool? - Only employees who have
been trained in the operation of the particular tool in used
All employees using abrasive wheels shall be protected by? - Eye protection equipment
Guarding, all portable, power-driven circular saws shall be equipped with what? -
Guards above and below the base plate or shoe. The upper guard shall cover the saw
to the depth of the teeth, except for the minimum arc required to permit the base to be
tilted for bevel cuts. The lower guard shall cover the saw to the depth of the teeth,
except for the minimum arc required to allow proper retraction and contract with the
,work. When the tool is withdrawn from the work, the lower guard shall automatically and
instantly return to the covering position.
Valve protection caps shall not be used for lifting cylinders from one vertical position to
another. - Bars shall not be used under valves or valve protection caps to pry cylinders
loose when frozen. Warm, not boiling, water shall be used to thaw cylinder loose
What are 4 types of Steel Decking? - Composite, Roof, Cellular, and Form
What are the lengths of Full sheets of Steel Decking? - 12", 18", 24", 30", or 36". All are
usually less than 40"
Who has full responsibility for Safety on a construction site? - The prime contractor
Who is responsible to ensure workers have appropriate eye protection? - The employer
Safety belt lanyard shall be a minimum of? - 1/2 inch nylon, w/ max length to provide for
a fall of no greater than 6ft. The rope shall have a nominal breaking strength of 5,400
lbs.
When should safety nets be provided? - When workplaces are more than 25 feet above
ground or water surface or where use of ladders, scaffolds, catch platforms, temporary
floors, safety lines, or safety belts are impractical
What are the different types of Safety Equipment? - Head, Eye and Face, and
Respiratory protection. Safety belts, lifelines, lanyards, and safety nets
Where should quantities of flammable liquid in excess of 25 gallons be stored in that is
acceptable or approved? - Acceptable wooden storage and Approved metal storage
cabinets. Cabinets shall be labeled in conspicuous lettering "Flammable-Keep Away
from Open Flames"
LP-Gas storage outside of buildings for containers waiting use shall be located from the
nearest building or group of buildings in accordance to? - 1. 500 lbs or less - 0ft
2. ***501 to 6,000 lbs - 10ft
3. 6,001 to 10,000 lbs - 20ft
4. Over 10,000 lbs - 25ft
Clearance and mounting of temporary heating devices are? - 1. Room heater,
circulating type - 12" sides, 12" rear, 18" chimney connector
2. ***Room heater, radiant type - 36" sides, 36" rear, 18" chimney connector
How far shall heaters used in the vicinity of the combustible tarpaulins, canvas, or
similar coverings be located from the coverings? - 10 feet from coverings
, Material stored inside buildings under construction shall not be placed with what
distances? - 6 feet of any hoistway or inside floor openings, ***not within 10 feet of
exterior wall which does not extend above the top of the material stored
Bagged materials shall be stacked by stepping back the layers and cross-keying the
bags at least by how many bags high? - 10 bags high
Brick stacks shall not be more than? - 7 feet in height
When a loose brick stack reaches a height of 4 feet, it shall be tapered back by how
many inches? - 2 inches in every foot of height above the 4-foot level
How should compressed air be secured? - In an upright position at all times except, if
necessary, for short periods of time while cylinders are actually being hoisted or carried
What distance shall Oxygen cylinders in storage be separated from fuel-gas cylinders or
combustible materials (especially oil or grease)? - A minimum distance of 20 ft (6.1m) or
by non-combustible barrier at least 5 ft (1.5m) high having fire-resistance rating of a
least one-half hour.
Inside of buildings, how shall Gas cylinders be stored? - In a well protected, well-
ventilated, dry location, at least 2 ft (6.1m) from highly combustible materials such as oil
or excelsior. Cylinders should be stored in definitely assigned places away from
elevators, stairs, or gangways. Assigned storage places shall be located where
cylinders will not be knocked over or damaged by passing or falling objects, or subject
to tampering by unauthorized persons. Cylinders shall not be kept in unventilated
enclosures such as lockers and cupboards.
How shall a regulator to a cylinder valve be connected? - The valve shall be opened
slightly and closed immediately. (The action is generally termed "cracking" and is
intended to clear the valve of dust or dirt that might otherwise enter the regulator.) The
person cracking the valve shall stand to one side of the outlet, not in front of it. The
valve of fuel gas cylinder shall not be cracked where the gas would reach welding work,
sparks, flame, or other possible sources of ignition.
All hose in use, carrying acetylene, oxygen, natural or manufactured fuel gas, or any
gas or substance which may ignite or enter into combustion, or be in any way harmful to
employees shall? - Be inspected at the beginning of each working shift. Defective hose
shall be removed from service.
When the arc welder or cutter has occasion to leave his work or to stop work for any
appreciable length of time, or when the arc welding or cutting machine is to be moved,
what should happen? - The power supply switch to the equipment shall be opened.
