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Construction safety > cranes and derricks part 2 > Flashcards

cranes and derricks part 2 Flashcards

1
Q

All belts, gears, pulleys, or any other moving parts must be _____ to prevent possible worker contact.

A

guarded

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2
Q

All cranes must have an _____ on hand for the crane in use.

A

operators manual

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3
Q

Minimum clearances between energized power lines and crane operations:

A
  1. No closer than 10 feet - up to 50 kV

2. Over 50 kV – 10 feet plus 0.4 inches for each 1kV over 50 kv

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4
Q

Where cranes must operate in proximity to energized power lines, What to things must be done?

A
  1. Lines must be deenergized and visibly grounded at the point of work
  2. Insulating barriers must be erected to prevent physical contact with the lines
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5
Q

An observer must be designated if it is difficult for operator to determine ____ clearances by visual means

A

power line

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6
Q

All overhead wires must be considered _____ unless line owner or utility indicates it is not and it has been visibly grounded.

A

energized

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7
Q

Should the crane contact power lines, the operator must _______ if it is at all safe to do so.

A

stay in the crane

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8
Q

If the operator MUST leave the cab due to imminent danger, they must jump free and clear, without _____.

A

touching the crane

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9
Q

If in contact with a high voltage power line, the power companies recommend the operator ____ the feet as they move away from the crane

A

hops or shuffles

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10
Q

Two rules for hammerhead tower cranes

A
  1. Employees required to work on the horizontal boom (load jib) must be protected from falls by guardrails or personal fall arrest equipment
  2. Buffers must be provided at both ends of the travel of the trolley
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11
Q

Overhead & Gantry Cranes five rules to follow

A
  1. An audible alarm system must be provided for each traveling mechanism
  2. Does not apply to floor operated units
  3. Rail sweeps must be provided
  4. Rated load capacities must be plainly marked on each side of crane
  5. If more than one hoisting unit, each load block must be marked with rated load and be visible from ground or floor
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12
Q

Crane Suspended Personnel Platforms use is prohibited unless.

A
  1. Conventional means of reaching work site would be more hazardous – or
  2. Not possible because of structural design or work site conditions
  3. If used, must be designed by a qualified engineer or qualified person competent in structural design
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13
Q

In Crane Suspended Personnel Platforms hoist drum must have ____________. Free fall is prohibited.

A

controlled load lowering system

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14
Q

Platform for Crane Suspended Personnel platforms must be equipped with:

A
  1. Guardrail system (per subpart M)
  2. Grab rail inside perimeter of platform
  3. Plate or marking indicating weight of platform and rated load capacity
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15
Q

When working with crane suspended personnel platforms, hoisting of _____ must be performed in a slow, controlled manner.

A

Personnel

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16
Q

When working with Suspended Personnel platforms, cranes must be equipped with _______ or system which deactivates hoisting action.

A

anti-two blocking device

17
Q

When working with suspended personnel platforms, safety latch on hook must be able to positively close & lock the _______.

A

throat opening

18
Q

When dealing with Crane Suspended Personnel Platforms, a trial lift must be completed as follows:

A
  1. Unoccupied platform loaded to anticipated lift weight
  2. Perform immediately before placing personnel in platform
  3. Repeat whenever crane is moved to new location or returned to a previous location
19
Q

When dealing with Crane Suspended Personnel Platforms, a pre-lift meeting must be attended by the

A
  1. crane operator
  2. signal person
  3. person responsible for task to be performed
20
Q

When dealing with Crane Suspended Personnel Platforms, a meeting to review OSHA requirements regarding platform use ______.

A

Must be held at each new work location.

21
Q

Why do cranes overturn?

A

Improper set up

22
Q

What are the two categories in Ground/Crane Condition that cause crane overturn? This accident makes up for what percent of crane overturn?

A

1.Ground unstable
2.Crane and/or ground not level
This accounts for 31%

23
Q

What are the two categories in Outrigger Deployment that cause crane overturn? What percent of crane overturn is caused y this accident.

A
  1. Outriggers improperly deployed
  2. Inadequate blocking/cribbing
    This accounts for 22%
24
Q

What are the two most common factors that cause Overloading? What percent of accidents are caused by overloading?

A
  1. Load weight greater than thought
  2. Load chart/computer ignored or misinterpreted
    16% of accidents are caused by this.
25
Q

What are the two most common factors that cause Operator Error? What percent of accidents are caused by this?

A
  1. Inexperience/unfamiliarity with equipment
  2. Dynamic loading(sudden starts/stops)
    31% of accidents are caused by this.
26
Q

Helicopter operations four rules

A
  1. Must comply with FAA regulations
  2. Must have pre-lift briefing daily
  3. Cargo hook must have emergency release
    mechanism
  4. Constant communication between pilot &
    ground signalman
    maintained in manner
    predetermined
27
Q

Material Hoists, Personnel

Hoists, and Elevators four rules to follow.

A
  1. Maximum operating loads & speeds must
    be posted
  2. All operations must follow manufacturer’s
    specifications
  3. Entrances to hoist ways must be guarded
  4. Secondary arresting device required on all
    hoists & elevators
28
Q

Personnel hoist. The only
person who should be able
to open the door to each
floor is the ____.

A

hoist operator

29
Q 
Poor set up. Employees
should never be allowed
to \_\_\_\_\_\_ to catch a ride on
the hoist due to the fall
hazard. Doorways must
be arranged so that only
the hoist operator can
open the door to the
building.
A

walk outside the building

30
Q

Base-Mounted Drum Hoists three rules to follow.

A 
1. Design, construction, inspection,
operation & maintenance must meet
manufacturer requirements
2. All controls must be within easy reach of
operator
3. All exposed moving parts must be
guarded
31
Q

Four rules for conveyors.

A
  1. Must meet ANSI B20.1-1957
  2. Must have shutoff device at operator station &
    start-up alarm
  3. All moving parts must have contact guards
  4. Lockout/tagout required during maintenance
    or repairs or during any hazardous operations
32
Q

Conveyors must meet ___.

A

B20.1-1957

33
Q

All conveyors must have ___ at operator station &

start-up alarm

A

shutoff device

34
Q

When dealing with conveyors moving parts must have ____.

A

contact guards

35
Q

When dealing with conveyors ____ required during maintenance

or repairs or during any hazardous operations

A

Lockout/tagout

36
Q

How often must a crane must be inspected

by the competent person?

A

Daily

37
Q

How many broken wires are allowed within

one lay of running ropes?

A

6 wires

38
Q

What device is required on cranes that

hoist personnel?

A

Anti Two Blocking Device

39
Q

How far must crane operations be from

power lines at 50 KV?

A

10 feet

Construction safety (24 decks)

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