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safety test 2 > October 7 > Flashcards

October 7 Flashcards

1
Q

for woodworking machinery, emphasis is placed…

A

upon the importance of maintaining cleanliness around woodworking machinery, particularly as regards the effective functioning of guard and the prevention of fire hazards in switch enclosures, bearings, and motors.

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2
Q

True or False: Push sticks or push blocks shall be provided at the workplace in the several sizes and type suitable for the work to be done

A

True

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3
Q

Abrasive Wheel Machinery: Work Rests

A

On offhand grinding machines, work rests shall be used to support the work. They shall be of rigid construction and designed to be adjustable to compensate for wheel wear. Work rests shall be kept adjusted closely to the wheel with a maximum opening of one-eighth inch to prevent the work from being jammed between the wheel and the rest, which may cause wheel breakage. The work rest shall be securely clamped after each adjustment. The adjustment shall not be made with the wheel in motion

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4
Q

Abrasive Wheel Machinery: Exposure Adjustment

A

Safety guards, where the operator stands in front of the opening, shall be constructed so that the peripheral protecting member can be adjusted to the constantly decreasing diameter of the wheel. The maximum angular exposure above the horizontal plane of the wheel spindle as specified in this section shall never be exceeded, and the distance between the wheel periphery and the adjustable tongue or the end of the peripheral member at the top shall never exceed one-fourth inch.

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5
Q

Inspection of Abrasive Wheel machinery

A

Immediately before mounting, all wheels shall be closely inspected and sounded by the user (ring test) to make sure they have not been damaged in transit, storage, or otherwise. The spindle speed of the machine shall be checked before mounting of the wheel to be certain that it does not exceed the maximum operating speed marked on the wheel. Wheels should be tapped gently with a light nonmetallic implement, such as the handle of a screwdriver for light wheels, or a wooden mallet for heavier wheels. If they sound cracked (dead), they shall not be used. This is known as the “Ring Test”

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6
Q

“Bite”

A

the nip point between any two inrunning rolls

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7
Q

“Calender”

A

a machine equipped with two or more metal rolls revolving in opposite directions and used for continuously sheeting or plying up robber and plastic compounds and for fractioning or coating materials with rubber and plastic compounds - VERTICAL

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8
Q

“Mill”

A

a machine consisting of two adjacent metal rolls, set horizontally, which revolve in opposite directions used for the mechanical working of rubber and plastics compounds

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9
Q

Mills Safety Controls - safety trip control

A

A safety trip control shall be provided in front and in back of each mill. It shall be accessible and shall operate readily on contact. The safety trip control shall be one of the following types or a combination thereof:

  • pressure-sensitive body bar
  • safety tripod
  • safety tripwire cable or wire center cord
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10
Q

Calender Safety Controls - Safety trip, Face

A

A safety tripod, cable, or wire center cord shall be provided across each pair of in-running rolls extending the length of the face of the rolls. It shall be readily accessible and operate whether pushed or pulled. The safety tripping devices shall be located within reach of the operator and the bite.

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11
Q

Calender Safety Controls - Safety Trip, Side

A

On both sides of the calender and near each end of the face of the roll, there shall be a cable or wire center cord connected to the safety trip. They shall operate readily when pushed or pulled

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12
Q

Stopping Limits for calenders and mills - determination of distance of travel

A

All measurements on mills and calenders shall be taken with the rolls running empty at maximum operating speed. Stopping distances shall be expressed in inches of surface travel of the roll from the instant the emergency stopping device is actuated

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13
Q

stopping limits for mills

A

not greater than 1 1/2 percent of the peripheral no-load surface speeds of respective rolls

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14
Q

stopping limits for calenders

A

not greater than 1 ¾ percent of the peripheral no-load surface speeds of the respective calender rolls.

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15
Q

“Press”

A

a mechanically powered machine that shears, punches, forms, or assembles metal or other material by means of cutting, shaping, or combination dies attached to slides. A press consists of a stationary bed or anvil, and a slide (or slides) having a controlled reciprocating motion toward and away from the bed surface, the slide being guided in a definite path by the frame of the press

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16
Q

“Device” for a mechanical power press

A

a press control or attachment that:

  • restrains the operator from inadvertently reaching into point of operation
  • prevents normal operation if the operators hand are inadvertently within point of operation
  • Automatically withdraws the operators hands if the operators hands are inadvertently within the point of operation as the dies close, or
  • Prevents the initiation of a stroke, or stops a stroke in progress, when there is an intrusion through the sensing field by any part of the operators body or by any other object
17
Q

Devices for mechanical power presses include:

A
  • presence sensing devices
  • holdout or restraint devices
  • pull-out devices
  • two hand control devices
  • interlocked press barrier guards
18
Q

Two-hand trips for mechanical power presses

A

a two-hand trip shall have the individual operators hand controls protected against unintentional operation and have the individual operators hand controls arranged by design and construction and/or separation to require the use of both hands to trip the press and use a control arrangement requiring concurrent operation of the individual operators hand controls

19
Q

Break system monitoring for mechanical power presses

A

When required by this section, the brake monitor shall be so constructed as to automatically prevent the activation of a successive stroke if the stopping time or braking distance deteriorates to a point where the safety distance being utilized does not meet the requirements

20
Q

Point of operation devices (in mechanical power presses) shall protect the operator if the operators hands are inadvertently places in the point of operation by:

A
  • preventing and/or stopping normal stroking of press
  • Preventing the operator from inadvertently reaching into the point of operation, or withdrawing his hands
  • Preventing the operator from inadvertently reaching into the point of operation at all times
  • Requiring application of both of the operators hands to machine operating controls and locating such controls at the “safety” distance from the point of operation
  • Enclosing the point of operation before a press stroke can be initiated and maintaining this closed condition until motion has ceased.
21
Q

Inspection and maintenance of mechanical power presses

A
  • it shall be the responsibility of the employer to establish and follow a program of periodic and regular inspections of his power presses to ensure that all their parts, auxiliary equipment, and safeguards are in a safe operating condition and adjustment. The employer shall maintain a certification record of inspection
  • each press shall be inspected and tested no less than weekly to determine the condition of the clutch/brake mechanism, antirepeat feature and single stroke mechanism. Necessary maintenance or repair or both shall be performed and completed before the press is operated.
22
Q

Reports of injuries to employees operating mechanical power presses

A

the employer SHALL, within 30 days of the occurrence, report to either OSHA or the State agency administering a plan all point of operation injuries to operators or other employees

23
Q

Presence Sensing Device Initiation (PSDI) for mechanical power presses

A
  • presence sensing devices can be used for both guarding and initiation of machine action
  • Presence sensing device must meet strict guidelines
24
Q

Prime-mover guards: Flywheels

A
  • flywheels located so that any part is 7 feet or less above floor or platform shall be guarded
  • wherever flywheels are above working areas, guards shall be installed having sufficient strength to hold the weight of the flywheel in the event of a shaft or wheel mounting failure
25
Q

Guarding Horizontal Shafting

A

All exposed parts of a horizontal shafting 7 feet or less from floor or workplace platform, excepting runways used exclusively for oiling, or running adjustments, shall be protected by a stationary casing enclosing shafting completely or by a trough enclosing sides and top or sides and bottom of shafting as location requires

26
Q

Projecting Shaft Ends

A

shall present a smooth edge and end and shall not project more than ½ the diameter of the shaft unless guarded by non-rotating caps or safety sleeves

27
Q

Horizontal Belts Requirements

A

where both runs of horizontal belts are 7 feet or less from the floor level, the guard shall extend to at least 15 inches above the belt or to a standard height, except that where both runs of a horizontal belt are 42 inches or less from the floor, the belt shall be fully enclosed in accordance with paragraphs (m) and (o) of this section

28
Q

Sprockets and Chains

A

All sprocket wheels and chains shall be enclosed unless they are more than 7 feet above floor or platform. Where the drive extends over other machine or working areas, protection against falling shall be provided

29
Q

Openings for oiling in gears, sprockets, and chains

A

When frequent oiling must be done, openings with hinged or sliding self-closing covers shall be provided. All points not readily accessible shall have oil feed tubes if lubricant is to be added while machinery is in motion

30
Q

Keys, Setscrews, and other projections requirements

A

All projecting keys, setscrews, and other projections in revolving parts shall be removed or made flush or guarded by metal cover. This subparagraph does not apply to keys or setscrews within gear or sprocket casing or other enclosures

31
Q

Standard Guards - General Requirements - Materials - standard conditions shall be met by the use of the following materials:

A

expanded metal, perforated or solid sheet metal, wire mesh on a frame of angle iron, or iron pipe securely fastened to floor or to frame of machine

32
Q

all metal should be :

A

free from burns and sharp edges

33
Q

Approved Materials: (when to use and not to use wood guards)

A

Wood guards may be used in the woodworking and chemical industries , in industries where the presence of fumes or where manufacturing conditions would cause the rapid deterioration of meta guards; also in construction work and in locations outdoors where extreme cold or extreme heat make metal guards and railings undesirable. In all other industries, wood guards shall not be used

34
Q

Robots and guarding

A
  • robots may activate without warning and move “unpredictably”
  • robots can travel rapidly within their reach envelope
  • accidents are most likely during programming, servicing, and maintenance (since during production operations no person should be in the work envelope)
35
Q

Robotic Safety

A
  • hazards associated with robots are better understood and awareness is higher than in the past:
    • “hard-wired” E-stops
    • pressure sensitive flooring
    • light curtains
    • interlocked fencing
    • minimize “hard” obstacles within the work envelope

safety test 2 (8 decks)

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