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121 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is the purpose of placing mats or cribbing under outrigger floats? |
Distribute the force over a large area |
spread it out |
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Where is the best location for leveling a crane? |
Upperworks |
not lowerworks |
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Before leveling a mobile crane on outriggers, an operator should ensure: |
There is no weight of the crane bearing on any tires |
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Operating a mobile crane with a long boom, on uneven ground, what support condition should be considered? |
Keeping a 90% angle between cylinder rod and pad |
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When may blocking (cribbing) be placed under outrigger beams on mobile cranes? |
Never approved |
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Mobile Cranes should be level to within what percent of grade |
1% |
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Timber crane mats work best when they are: |
Bolted together |
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When arriving in the crane at the job sitr, operator should first determine the condition of the: |
Access roads |
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What surface listed below would NOT be a good location for assembly or setup of a mobile crane? |
Above underground vaults |
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Each outrigger pad and its blocking should be sufficient to support? |
The total weight of the crane and its load |
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How doeshigh wind affect a mobile crane with a long boom? |
Introduces side load onto the boom |
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When is the only time the outrigger beams should be less than fully extended? |
Th load chart indicated that this allowed |
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What is the primary purpose for a rooster sheave or auxiliary boom point sheave? |
Separate the load hoist lines |
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Eccentric main boom tip reeving causes which of the following? |
Twisting of main boom |
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Which type of wire rope listed below is installed on most cranes? |
Right regular lay |
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The hoist drum flange shall extend a minimum of _________ over the top layeer of wire rope at all times while crane is in operation. |
1/2 inch |
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Which of the following is classified as a standing wire rope? |
Pendant line |
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When lifting on outriggers, floats or pads should always be: |
Secured to the outriggers cylinder |
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How many randomly broken wires in a lay length must there be on a mobile cranes hoist line, before it should be removed from service? |
6 |
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What is the minimum design factor required for a right regular lay, boom or hoist wire rope? |
3.5 |
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On a mobile crane, how many broken wires are permitted at theend connection of a pendant before it must be taken out of service? |
1 |
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Type 1 rotation resistant hoist wire rope has a design factor of: |
5 to 1 |
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It is important to know when lubricating crane hoist wire rope, that the lubricant must: |
Not hinder visual inspection |
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How often is the competent person required to inspect the running wire ropes on a mobile crane? |
Each shift |
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On mobile cranes, how many broken wires must be present in one strand of one lay for running wire rope to be removed from service? |
3 |
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How many randomly distributed broken wires in rotation-resistant hoist wire rope are considered for replacement? |
2 broken wires in a 6 rope diameters |
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According to OSHA, what is the minimum number of full wraps of wire rope that must remain on hoist drums in all service conditions? |
2 |
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On whose recommendations should a mobile crane preventative maintenance program be developed |
Crane manufacturer |
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On a mobile crane, the measurement for the load radius is the distance from the center of gravity of the suspended load to the: |
Center of rotation of the crane |
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On a mobile crane, should the load be applied when determining the proper boom angle? |
Yes |
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On a mobile crane range diagram, boom length and boom angle can be used to determine? |
Load radius |
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On a mobile crane, what is the weight of the stowed jib that is deducted in load chart calculations called? |
Effective weight |
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When determining boom tip elevation for a mobile crane, the user could: |
Use range diagram |
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The teerm net capacity is best defined by which of the terms listed below |
Gross capacity minus capacity deductions |
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When lifting off the main boom, how is the effective weight of the fly/jib different in the erected position from that of the stowed position |
Effective weight increases |
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Mobile cranes that are setup on barges, shall have a list chart provided by which of the entities listed below? |
Manfacturer |
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When lifting loads on tires, mobile cranes are rated at what percentage of tipping? |
75% |
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How does the effective weight of a stowed extension relate to the actual weight of the extension? |
Lowered than actual weight |
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When load radius is between radii values, the operator must use the: |
longer radius |
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Why do most crane manufacturer reduce load capacity for duty-cycle operations? |
Side loading forces may occur |
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Why should approved attachments or extra counterweights provided by the manufacturer be placed on the rear of crane? |
They coud cause a backward stability problem |
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A mobile crane's jib is offst 15 degrees versus its original 0 degree offset, but the boom angle remains unchanged. in this situation, the loadradius: |
increases |
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What is the difference between an anti-two-block warning device and an anti-two-blockprevention device? |
Warning device only warns, but prevention devices will stop the functions. |
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How can the LMI's boom length or load radius reading be verified? |
Actual measurements |
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On mobile cranes, what does the boom angle indicator show the operator? |
Angle of boom to horizontal |
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What is the device called that automatically stops the boom whenit rears the cranes maximum angle? |
Boom hoist limiting |
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When the number of layer of wire rope on a drum increases the: |
Allowable line pull decreases |
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On amobile crane, sideloading of the boom could be caused by which of the following? |
Starting or stopping the swing too rapidly |
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Which person listed below, has the responibility for determining the correct weight of a load? |
Lift Director |
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What must an operator do when an operator leaves the controls of the crane of an edxtended period of time? |
Apply all brakes and dogs, and leave the load suspended |
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Abruptly stopping a rapid swing on a long-boom mobile crane will will produce what effect? |
Collaspsing the boom |
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When should a tag line be used, during the hoisting of material? |
When the rotation of the load would be dangerous |
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What percentage of the rated capacity of a mobile crane must be used when lifting with two cranes attached to the same load? |
75% |
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When lifting a load with two mobile cranes, it is very important to: |
Keep the hoist line of both cranes vertical |
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if lifting a load with two mobile cranes of different rated capacities, the crane with the larger rated capacity should: |
be hooked at a distance closer to the loads center of gravity |
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When determining the position to a mobile crane should be left in over night, high winds in the forecast the operator should: |
follow manufacturers recommendations |
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When performing a multiple crane lift it is importsny for the operator's of each crane to understand that: |
The weight may increase if the other crane lands the load |
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When lifting loads that are submerged under water with a mobile crane, what is one of the conditions that the operator should be familiar with? |
Load will increase when lifting the load out of the water |
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When lifting over water with personnel platform, what are the occupants of the platform required to wear? |
A flotation device |
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If a mobile crane is NOT set-up level and the operator swings the load from the high side to low side, what effect will that have on the radius? |
the radius increases |
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Increasing the distance from the crane's center of gravity to the tipping axis will have what effect on a mobile crane? |
Increases stability |
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Backward stability of a mobile crane is tested in which configuration listed below? |
Basic boom at maximum angle no load |
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What is the minimum pith diameter used for sheaves in q boom hoist reeving system using rotation resistant rope? |
Not less than 18 times rope diameter |
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When can capacity altering modifications be made to mobile cranes? |
When permission is given by the crane manufacturer |
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A cranee is at the point of instability when the crane's leverage on the load equals: |
100% of the cranes leverage on the crane |
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Who must determine maximum speed for a mobile crane to travel with a suspended load? |
A competent person |
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Deflection of the boom while operating a mobile crane will increase? |
Load radius |
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A sudden start or stop of the hoisting function while operating a mobile crane can produce a: |
Dynamic load |
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When traveling with a suspended load on a mobile crane climbing an incline, the load should be carried in which direction? |
Uphill |
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Which mobile crane boom configuration can cause the most hazardous side-loading condition for the crane |
Long boom with minimum radius |
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When preparing to hoist a load, the load block hook should be positioned: |
Directly above the load's center of gravity |
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When making a lift on outriggers, the maximum ground-bearing pressure occurs in which boom position? |
Over the corner |
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When personnel platforms are hoisted with a mobile crane with a mobile crane what item listed below |
an anti two-block device |
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Personnel platforms suspended on the hook of a mobile crane, must |
50% |
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When proof testing a personnel platform to 125% of its rated capacity, how long must the platform be suspended? |
5 minutes |
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Which of the following correctly states the requirements for hooks used to hoist employees on crane-supported personnel platform? |
Hooks shall have a latch that closes and locks |
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OSHA permits hoisting of personnel by a crane as long as the employer can show: |
There is no less hazardous or practicable way |
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Before lifting an occupied personnel platform on a jobsite the crew must ensure they perform which of the following? |
All of the above |
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Before lifting an occupied personnel platform on a jobsite , which of the following applies? |
Allof the above |
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Which of the follwing standards or regulations governs the lifting of personnel in construction? |
OSHA 1926.1431. |
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According to OSHA 1926.1431, whish device listed below must be attached to the crane? |
Anti-two-block |
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According to OSHA 1926. 1431, which of these hoist options is prohibited? |
Hoist free fall |
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Inside the personnel platform except for gates, how much of the perimeter must contain a grab rail for the occupants? |
100 percent |
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According to OSHA 1926. 1431, during personnel platform hoisting operations, access gates shall NOT swing in which direction? |
Outward |
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OHSA 1926.1431 states that tag lines must be used: |
When necessary to control platform |
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According to OHSA 1926. 1431, while hoisting a personnel platform, what weather condition listed below will promptly discontinue the operation? |
Dangerous |
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While hoisting employeesin a personnel platform, direct communication must be maintained between the signal person and who? |
Operator |
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According to OSHA 1926. 1431. at what wind speed must a qualified persontobe consulted? |
20 mph |
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If working near power lines and using a tag line, which type of rope is least conductive to electricity? |
Polypropylene |
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When working near power line with a mobile crane, where does OHSA require caution stickers be installed on all equipment? |
At operators station and 5 on the outside of the equipment |
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According to OSHA table T, what is the minimum clearence for 133kv powerlines? |
10 feet |
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According to OSHA, when working near power lines when is a dedicated spotter required? |
When crane operator is unstable to see the warning line of signs |
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According to OHSA's table T, what clearance should a mobile crane IN TRANSIT |
16 feet |
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According to OHSA when is it safe to hoist loads with a mobilecrane below energized power line? |
When the fully extended boom can't reach the prohibited zone |
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According to OSHA1926. 1408, when operating near high voltage power lines, what clearance shall be required when the rating of the lines is 275kV? |
20 feet w/encroachment precautions |
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according toOSHA 1926. 1411, when yiu encounter power lines with a voltage of 44 kV and the crane is TRAVELING, according to TABLE T, what is the minimum required clearance? |
6 |
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According toOSHA 1926. 1408, the minimum clearance between any part of the crane and power line rated 50 kV or below shall be: |
10 feet w/encroachment precautions |
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According to OSHA 1926. 1408, for power lines rated 110kV, the minimum clearance between the crane and any lines shall be? |
15 feet w/encroachment precautions |
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The term "jib offset" can be expressed as the jib angle to which moblie crane component listed below? |
Boom |
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On a mobile crane the term "part's of line" refers to which item listed below? |
The number of lines running thur the load block and boom point sheaves |
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According to OHSA, mobilecrane load block hooks must not have a twist in excess of: |
10 degrees |
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According to OSHA,mobile crane load block hooks must not have a throat opening in excess of: |
15% of its original size |
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What is the design factor for grade 80 chain slings? |
4 |
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What grade alloy steel chain should be used for hoisting slings? |
80 |
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LOads rigged using a basket hitch should be to prevent slippage |
Balanced |
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When slings encounters harpedges on loads to be lifted, riggers shall ensure that slings are: |
Protected or padded |
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According to OSHA, quadruple sling bridle rating are the same as: |
Triple sling bridle ratings |
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When correctly installing U-bolt type wire clips, the U portion of the clip shall be on: |
The dead or short end |
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Which statement listed below is correct about basic load rigging? |
As horizontal load angle decreases, stress increases |
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The approximate percentage of strength of choker, vertical, and basket hitches respectively are: |
75%, 100%, 200% |
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According TO ASME which of the following listed below shall NOT be used for the suspension sytem on suspended personnel platforms? |
Synthetic web bridle |
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When rigging a bundle of pipe or tubing, which of the following would provide the best bontact between sling and load? |
Double wrap choker |
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What is the angle between the top of the load and the sling leg referred to in sling load charts? |
Horizontal sling angle |
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when installing a wedge socket, it must be attached with the load line pulling in a straight line from the: |
Pin |
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For any signal other than emergency stop, who is permitted to give hand signals to the crane operator during a lift? |
A qualified signal person |
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What is the first element of voice signals given to crane operator prior to the lift? |
Function and direction |
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according to OSHA, each series of voice signals contain how many elements? |
Three |
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When directing a crane using voice signals the transmission must be through a channel that is: |
Dedicated |
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Before commencing lifting operations, the operator and signal person must contact and identify each other when using which form of communication? |
Basic signals |
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According to OSHA where must a signal chart be posted? |
On the equipment or in the area of the hoisting opeations |
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How many auduble travel signals are there? |
3 |
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