Power-horse Library

The crane is out of level, you release the swing break, the boom swings downhill, your: - ANSWER Load radius increases Blocking can be placed under the ends of tracks to: - ANSWER Increase the cranes stability when Operating over front or back What quadrant produces the least amount of ground pressure on a lattice crawler: - ANSWER Side On lattice boom crane's fitted with power load Lowering , a heavy load should be lowered by using the: - ANSWER Power Load-lowering feature and the foo...

If the operator is setting up the crane alone, which of the following is required? A. Overhead power lines must be at least 10ft over the boom B. Wind speed cannot exceed on the Beaufort C. The red cones designating the work zone must be set up D. Stabilizers shall be visible to the operator when extending and setting - ANSWER D. Stabilizers shall be visible to the operator when extending and setting Before the boom is un-stowed from the transport position which of the following is mos...

Splices in rall tracks shall have - ANSWER Smooth Joints Hydraulic systems should have their proper fluid level checked - ANSWER Daily If power fails during operations, the following shouldn't apply - ANSWER Do your best to finish moving load where it was designated to go If load is undetermined who is to find out if load weight does not exceed crane rating at radius at which the load is to be lifted - ANSWER Person responsible for lift Where should climbing instructions be kept - A...

Crane configuration includes: A. reeving, boom length, counterweight, on outriggers, on rubbers, extensions or jibs stowed or mounted, off sets, wire rope type or construction B. hoist drum speeds, line pull, wire rope size and rigging C. load charts, LMI, axle weights and center of gravity D. drum rotation indicator, anti-two block, axle lock outs, and positive house lock - ANSWER A How does the operator determine the manufacturers recommended rope for the crane? A. count the sheav...

Where is the best location for leveling a crane? - ANSWER Upperworks When determining the "gross load" the best method is: - ANSWER Get an accurate load weight and add the rigging. By order of hitch strength, which is the correct answer? - ANSWER Basket, vertical, choker What is the purpose of using a jib? - ANSWER Increase height When taking a side strain on a boom, what concerns the operator most? - ANSWER Boom damage You should always have at least how many wraps on a hoist d...

When making a multiple crane lift, it is important for the operator to understand that: - ANSWER The weight may increase if the other crane lands the load If a crane is not set-up level and the operator swings a load from the high side to the low side, the load radius will: - ANSWER Increase Most crane manufacturers reduce load capacity for duty-cycle operations because: - ANSWER Side loading forces may occur On who's recommendations should a preventative maintenance program be set-up?...

Distribute over a larger area. - ANSWER What is the purpose of placing mats or cribbing under outrigger floats? Upperworks. - ANSWER Where is the best location for leveling a crane? there is no weight of the crane bearing on any tires - ANSWER Before leveling a mobile crane on outriggers, an operator should ensure: Operating a mobile crane with a long boom, on uneven ground, what support condition should be considered? - ANSWER Keeping a 90° angle between cylinder rod and pad. Opera...

The term "Superstructure or Upper works" refers to the area of the crane: - ANSWER Above the swing circle A crane must be level within _______% for the load chart ratings to be valid? - ANSWER 1% On what principle is crane stability based? - ANSWER Leverage What would be the effect of moving the tipping axis closer to the cranes center of gravity? - ANSWER Reduced stability Which of the following matches the appropriate load chart to a particular crane? - ANSWER Serial number Wh...

To provide protection in the crane's work area, barriers MUST be erected in accessible areas: A. Within machinery housing C. Within maximum radius D. In landing area - ANSWER B.Within the equipment's rotating structure All of the following can cause a two-block condition EXCEPT: A. Extending the boom B. Lowering the boom C. Hoisting up with the winch - ANSWER D. Raising the boom When rotation of the load may be hazardous, the operator must B. Use a longer radius C. Caution ...

The part of the load chart governed by stability is based on what percentage of capacity while a crawler crane is working over the side quadrant? - ANSWER A. 75% The most unstable working quadrant for a crawler crane is the; - ANSWER Side The lattice boom is designed to take winds of up to 20 mph. from the side plus a full rated load, plus a direct side load equal to what percent of the rated load? - ANSWER 2% What type of capacity is listed on a crane load chart? - ANSWER Static If ...