Which parts of machines that use abrasive wheels must be protected by safety guards?
Spindle end, nut, and flange projections
Mounted wheels less than two inches in diameter
Wheel periphery and adjustable tongue
Horizontal plane of the spindle
answer
Machines that use abrasive wheels must have safe guards that protect the spindle end, nut, and flange projections area to prevent injuries.
question
When not in use, hand-held electric power tools should be _____.
Locked
Tagged
Unplugged
Stored
answer
Unplugged
question
Machinery with rotating or reciprocating parts that are within seven feet of the floor or working platform requires what additional equipment?
Reinforced couplings
Shaft projections
Effective guards
Balanced pulleys
answer
Effective guards shall be in place for machinery with rotating or reciprocating parts that are within seven feet of the floor or with a working platform.
question
Compressed air may be used for cleaning only if it is reduced to _____ P.S.I.
30
40
50
60
answer
30
question
If electrical hand tools are equipped with a three-pronged power cord with one wire going to ground, the operator must be protected from electric shock by:
GFCI
Non-conductive PPE
Specific training
Emergency cut-off switch
answer
A ground fault circuit interruptor must be used with all electrical tools to prevent shock in case of a short circuit, or flaw in the tool if the tool is not double insulated by the manufacturer.
GFCI
question
In addition to physical safeguards on all machinery, what else must an effective safeguarding system include?
On-time inspections of all machinery
Hands-on training of management
Instant accident reporting system
Specific and detailed training of workers
answer
To have an effective safeguarding system, specific and detailed training of workers must also be included.
question
Employees using hand and power tools are best protected from hazards by employer-provided _____.
Restrictions
Instructions
PPE
Training
answer
PPE
question
The minimum general safety requirements for machines include all these safeguards EXCEPT:
Prevent contact with dangerous moving parts
Ensure that no objects can fall into moving parts
Create no new hazards or interference
Allow automatic start-up after power failures
answer
Allowing automatic start-up of machines after power failure is not part of a general safety requirement, and may cause severe injuries
question
Why must abrasive grinding wheels be inspected carefully and the spindle speed checked before mounting?
Machine safeguards prevent visual inspection during operations.
Spindle speeds must not exceed maximum operating speed.
Improperly mounted and used wheels can damage equipment.
Improperly mounted and used wheels can explode and cause injury.
answer
Abrasive grinding wheels must be inspected carefully and the spindle speed checked before mounting to avoid improper mounting and to prevent the exploding of used wheels that may cause an injury.
question
Blade guards for both radial and circular table saws must automatically:
Turn off if the power supply fails
Engage the spreader
Adjust to the thickness of the stock
Release while grooving or rabetting
answer
Blade guards must automatically adjust to the thickness of the stock of the material being processed.
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