Quiz 12 Welding and Cutting
Fire prevention precautions
Fire watchers are additional personnel assigned to a work area when normal _________ are not sufficient
All of the above
Any current-carrying parts that pass through the outer surfaces of the jaws of a manual electrode holder must
Discharged
Contaminated air exhausted from a working space must be _______ clear of source of intake air
True
Cylinders must be moved by tilting and rolling them on their bottom edges
True
Drums, containers, or hollow structures that have contained toxic or flammable substances must be filled with water or thoroughly cleaned, ventilated, and tested before they are use for welding, cutting, or heating
True
Employees performing any type of welding, cutting, or heading must be protected by suitable eye protective equipment
Be easily distinguishable from each other
Fuel gas and oxygen hoses must
Must not
Full or empty cylinders _____ be used as rollers or supports
that are equal to or exceed
Ground return cables must have safe current-carrying capacitiees __________ the specified maximum output capacity of the arc welding or cutting unit it services
False
In confined spaces, ventilation must be provided in the form of oxygen
Must not be interchangeable
Oxygen and fuel hoses
Ultraviolet light from the welding arc
Ozone (O3) is produced by
True
Preservative coatings must be considered highly flammable when scrapings burn with extreme rapidity
either A or B
The frames of arc welding and cutting machines may be grounded through
False
Torches may be lit by either fricition lighters or matches
All of the above
Torches must be
True
Under normal circumstances when toxic materials and confined space welding is not required, welding may be performed without respiratory equipment.
When scrapings burn with extreme rapidity
Under what circumstances are preservative coatings considered highly flammable?
True
When a welder enters a confined space through a small opening, an attendant must be present and stationed outside to lend assistance when rescue is necessary.
Thoroughly training employees and supervisors
Which of the following can reduce common hazards found in welding and cutting operations?
Vertical
When cylinders are transported by powered vehicles, they must be secured in a _______ position.
Fire hazards within the vicinity must be moved
When objects that are to be welded, cut, or heated are not readily moved to a designated location, which of the following precautions must be taken?
True
Fire watchers are employees who at times must be assigned to guard against fire while the actual welding, cutting, or heating operation is being performed
All of the above
Which of the following are safe practices for welding, cutting, or heating in confined spaces?
All of the above
Which of the following can cause hazards in welding, cutting, or heating?
True
For quick closing, valves of fuel gas cylinders should not be opened more than 1 and 1/2 turns
True
Artificial cooling of the metal surrounding the heating area may be used to limit the size of the area required to be cleaned.
False
Cables may not be spliced together
False
Clogged torch tip openings do not need to be cleaned with suitable cleaning wires, drills, or other devices designed for such purpose.
Lung irritation
Common side effects of exposure to high concentrations of cadium fumes include
any of the above
Hoisted cylinders must be secured on a
Must be able to safely handle the maximum rated current required by the electrodes : Capacity of manuel electrode holders Must be specifically designed for arc welding and cutting : Manuel electrode holders Must be fully insulated against the maximum voltage encountered to ground : Cutter grips Must use only approved manuel electrode holders : Employees
Match each of the following to the correct responsibility and click submit
By not opening these more than 1 and 1/2 turns, this enables quick closing : Valves of gas cylinders When needed, this must be left in position on the stem of the valve while the cylinder is in use so that they fuel gas flow can be shut off quickly : Special wrench At least one special wrench must always be available for immediate use when working with these : Manifolded or coupled cylinders This may be placed on top of an in-use fuel gas cylinder that may damage the safety device or interfere with the quick closing of the valve : Nothing
Match the following definitions to the relevant terms
The practie of slightly opening then closing the valve before a regulator is connected
The term "cracking refers to
Air line respirators
When sufficient ventilation cannot be obtained without blocking the means of access, employees in the confined space shall be protected by
dip electrode holders in warm water after each use
Which of the following is not a safe practice for arc welding?
Tile and roll along the bottom edge
Which of the following is the proper way to move a cylinder by hand?
