Reference no: EM132868873

Question 1
On a telescoping boom crane, the actual operating radius is typically greater than the radius calculated from the main boom section angle (to horizontal) and the boom length.

• True
• False

Question 2
On a lattice boom crane, the pendant cables raise and lower the boom.

• True
• False

Question 3
Your group leader asked you to determine the minimum required boom length for a Link-Belt 60-ton telescoping boom truck crane, to lift a 9-ton load from the delivery truck at a 20 ft radius and place it at twice the distance. Assume that the load chart provided is correct for the crane's configuration, and that load transfer to the ground is not an issue. The crane will be equipped with a 500 lbs hook block.

• 30 ft
• 35.5 ft
• 40 ft
• 80 ft
• 90 ft

Question 4

What do the shaded areas in a crane's load chart typically signify?

• The need for additional counterweight
• The use of a higher capacity hook block
• The rated load is limited by structural or hydraulic system considerations
• None of these answers

Question 5

Crane lift charts present the maximum safe lift load for the crane's least stable lift quadrant (i.e. lower bound), independent of whether the lift movement will swing through that quadrant.

• True
• False

Question 6

You're working in an industrial plant and have to lift a pre-fabricated, modular process unit into place amongst other active process equipment. There are job-site space constraints that will impact the crane's configuration:
• A maximum operating radius of 35 ft (the closest possible crane position to the load's placement location);
• A height restriction that will limit the maximum boom length to 70 ft (which you'll need); and
• Limited crane access requiring the crane's outriggers to be in a fully retracted position.

To compensate for the retracted outrigger position, the crane will be configured with a 9,600 lbs counterweight.
Carefully review the provided crane load charts. Using the applicable load chart, determine the maximum safe lift load for the job-site constraints.

• 9,700 lbs
• 28,800 lbs
• 29.200 lbs
• Not enough information to answer

Question 7

If a crane equipped with a 5-ton counterweight has a tipping load of 45 tons at a pick radius of 30 ft, will the tipping load increase or decrease if the crane is re-positioned closer to the pick location?

• Increase
• Decrease

Question 8
Hydraulic (telescoping boom) cranes have an advantage over crawler lattice and tower cranes in their mobility between project sites, faster setup, and very low operating cost.

• True
• False

Question 9
Review the project scenario shown in the accompanying image. A crawler lattice crane is proposed to place a 30-ton, 10 ft tall load onto the top of the structure shown. The planned crane configuration and rigging is shown, and the rigging will attach to the top of the load. You've been tasked with determining the required boom head height, so that a minimum boom length can be selected. Assume a 5 ft vertical clearance distance as the load passes over the top edge of the structure. What is the minimum required boom point height (distance) above the crawler track working platform grade to accomplish the lift?

• 80 ft
• 90 ft
• 95 ft
• 100 ft
• Not enough information provided to answer

Question 10

Simply the presence and use of wood cribbing mats on a crane lift, is sufficient in itself to assume safe crane load transfer to the ground and no need for design evaluation.

• True
• False

Question 11
Tower cranes offer high lift heights, good operating radii, and high lift capacity when compared with mobile cranes.

• True
• False

Question 12
A mobile crane is equipped with a 10,500 lbs counterweight and 1,500 lbs of rigging equipment. The crane's load chart indicates a maximum safe lift load of 22.75 tons for the crane's planned configuration (operating radius, boom length, outrigger extension). What is the maximum net weight (nearest 0.1 tons) possible for a picked load in this scenario?

Question 13
If a 20-ton load is to be lifted by the hook block setup shown in the accompanying image, calcu the required hoist line pull force necessary to lift the load.

• 2 tons (1) 5 tons
• 6.7 tons
• 10 tons
• Not enough information provided to answer

Question 14
Based on the image below, what is the rigger communicating to the crane operator?

• Set the load down
• Lower the boom
• Lower the load
• Those sunglasses aren't working for you

Question 15
Select all answers below that represent a critical crane lift factor.

• Two cranes simultaneously lifting the same load
• Moving a load that is lifted by a crane on one end, and supported by the ground on the other end during the move
• Lift made out of the view of the crane operator 111 All of these answers

Attachment:- Means and methods.rar