NASCLA ACCREDITED EXAM 2023-2024 ACTUAL
EXAM 250 QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) | AGRADE
Where should quantities of flammable liquid in excess of 25 gallons be stored in that is
acceptable or approved? – ….ANSWER….Acceptable wooden storage and Approved
metal storage cabinets. Cabinets shall be labeled in conspicuous lettering “FlammableKeep 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? – ….ANSWER….1. 500 lbs or
less – 0ft
- ***501 to 6,000 lbs – 10ft
- 6,001 to 10,000 lbs – 20ft
- Over 10,000 lbs – 25ft
Clearance and mounting of temporary heating devices are? – ….ANSWER….1. Room
heater, circulating type – 12″ sides, 12″ rear, 18″ chimney connector - ***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? – ….ANSWER….10 feet from coverings
Material stored inside buildings under construction shall not be placed with what
distances? – ….ANSWER….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? – ….ANSWER….10 bags high
Brick stacks shall not be more than? – ….ANSWER….7 feet in height
When a loose brick stack reaches a height of 4 feet, it shall be tapered back by how
many inches? – ….ANSWER….2 inches in every foot of height above the 4-foot level
When masonry blocks are stacked higher than 6 feet, the stack shall be tapered back
how far? – ….ANSWER….Back one-half block per Tier above the 6-foot level
Used lumber shall have what withdrawn before stacking? – ….ANSWER….Nails
How shall lumber be stacked? – ….ANSWER….On level and solid supported sills, and
stable and self supporting
Lumber piles shall not Exceed? – ….ANSWER….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? – ….ANSWER….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? – ….ANSWER….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? –
….ANSWER….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? –
….ANSWER….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? – ….ANSWER….Only
employees who have been trained in the operation of the particular tool in used
All employees using abrasive wheels shall be protected by? – ….ANSWER….Eye
protection equipment
Guarding, all portable, power-driven circular saws shall be equipped with what? –
….ANSWER….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. – ….ANSWER….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
How should compressed air be secured? – ….ANSWER….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)? – ….ANSWER….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? – ….ANSWER….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? – ….ANSWER….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? – ….ANSWER….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? – ….ANSWER….The power supply switch to the equipment shall
be opened.
Lifelines. Where a welder must enter a confined space through a manhole or other
small opening, what should occur? – ….ANSWER….Means shall be provided for quickly
removing him in case of emergency. When safety belts and lifelines are used for this
purpose they shall be so attached to the welder’s body that his body cannot be jammed
in a small exit opening. An attendant with a pre-planned rescue procedure shall be
stationed outside to observe the welder at all times and be capable of putting rescue
operations into effect.
What are 4 types of Steel Decking? – ….ANSWER….Composite, Roof, Cellular, and
Form