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42 Cards in this Set
- Front
- Back
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What effect does the proper use of mats, blocking or cribbing, and outriggers or crawlers have to the suitability of the supporting surface.
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Better distributes and lessens loads on the supporting surface
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Pre-operational inspections are necessary and required:
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To enhance cranes safety by discovering discrepancies prior to operating
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When assembling or dismantling lattice booms, it is safe to work under the boom:
a. If there is tension on the boom pendant line b. To remove the bottom pins only c. As long as the sections are blocked |
NONE
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Why use mats or cribbing?
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To reduce ground pressure
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When installing the boom pins, the pin should be pointing:
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Out away from boom center
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The proper way to calibrate a boom angle indicator is:
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Using a level, raise the boom to horizontal and set the indicator at 0 degrees.
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During disassembly of a long boom, the hog lines are connected at the maximum cantilever
point and the boom is slightly lifted off the ground. Which pins are to be removed next? |
The bottom pins ahead of the cantilever point
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When assembling a crane you can lift the boom sections by rigging the chokers around?
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None
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Where is the best location for leveling a crane?
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Upperworks
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During setup how do you determine machine clearances (counterweight, boom, and outrigger)?
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Measure for correct distance
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What is not a good location for crane setup?
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Above utilities
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All hazards and potential problems should be discovered during the:
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Pre-lift site inspection
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When setting up a crane in an area that has public access you should barricade:
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The working radius
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Blocking can be placed under the ends of tracks to:
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increase the crane’s stability when operating over front or back.
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On a lattice boom crawler crane, the main boom length is measured from the:
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center of the boom heel pins to the center of the boom tip sheave.
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When blocking under a mobile crane outrigger float, the block should be:
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Parallel and tightly spaced
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The percentage of mobile crane accidents caused by improper crane setup is:
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Over 50%
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When preparing to set up a mobile crane for operation, the following steps must be taken by
the operator: a. Check ground condition for stability b. Check overhead clearance c. Check swing clearance |
All of the above
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A pin-connected lattice boom is being dismantled. After connecting the equalizer (bridle) to
the connecting lugs on the boom, which boom connecting pins should be removed first? |
Lower connection pins, located at and ahead of the equalizer.
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The bearing pressure of a modern mobile crane on outriggers can vary anywhere from:
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200 psi to over 1,000 psi
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Your crawler crane is on a barge, it is necessary to:
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secure the crane to the barge.
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When assembling a lattice boom on most crawler cranes using inserts of different lengths,
which insert section generally should be closest to the boom foot? |
10 ft
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When a lattice boom truck crane is lifting on outriggers, the floats or pads should always be:
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secured to the outriggers.
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Manufacturer specifications permit only a certain amount of boom to be suspended out past
the connection point of the pendants during assembly or disassembly of the boom. The portion of boom that is suspended in this way is called the: |
cantilever length.
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When lattice boom is being disassembled or shortened, it is extremely important to:
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never touch any pin on any boom section located between the pendant attachment points and the crane.
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When installing a pin-connected lattice boom on a mobile crane you should always:
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use the boom hoist pawl to hold the boom.
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Before making a lift on outriggers, an operator should always:
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Extend the outriggers completely and be sure the tires are clear of the ground and stabilizer pads are on firm ground.
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The purpose of placing mats or cribbing under outrigger floats is to:
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distribute the downward force of the float over a larger area.
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Operating a crane with a long boom, on uneven ground, you should
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block under the pad and keep a 900 angle between cylinder rod and pad.
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When operating a RT and extending outriggers from the upper, you should:
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make visual contact or post a signalperson.
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Blocking (cribbing) may be placed under outrigger beams:
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Never
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Timber blocking placed under the tips of the tracks on a crawler crane will:
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make the crane more stable
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When handling boom sections, the best place for slings to be attached is:
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at the pin connection points at the ends of the top chords
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When setting a crane up on outriggers, the wheels of the crane should:
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be just high enough off the ground to relieve the tires of crane weight
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You’re setting the crane up in a confined area and you cannot fully extend your fourth
outrigger. Your crane does not have a load chart for intermediate extension working. In such a situation you should use the capacities in the: |
on-rubber load chart
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Jib backlash how much?
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5 degrees
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How is site access and usability identified and evaluated?
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Job site inspection, taking measurements and comparing measurements to crane specs
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According to ANSI B30.5 personnel platform lifts should not be made with wind in excess
of: |
15 mph
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When lifting personnel in a manbasket using 6 X 19 wire rope, the minimum safety factor
is? |
7
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Before lifting an occupied personnel basket for the first time on a job:
a. You must make a pre-lift meeting b. Outriggers must be fully deployed c. You must make a trial lift |
All of the above
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When personnel platforms are lifted with a telescopic crane:
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a two block damage prevention system is provided.
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What is the safety factor required when using non-rotating wire rope and lifting personnel in
a manbasket? |
10 OSHA
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