NASCLA ACCREDITED EXAM -

NASCLA ACCREDITED EXAM -

EXAM 250 QUESTIONS AND CORRECT DETAILED

ANSWERS WITH RATIONALES (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 "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?

• 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-

• 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 crosskeying 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Used lumber shall have what withdrawn before stacking?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 are 4 types of Steel Decking?Cterm-0omposite, 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