Multiple Choice Fall Exam

NCCCO Telescopic Boom Crane- Multiple Choice Fall Exam Review Questions and Answers 100% Pass When working on rubber, cranes are rated at what percentage of

tipping:

• 70%
• 75%
• 80%
• 85% - Answer>>75%

When a crane is working "on outriggers" the only time they should

be less than fully extended is when:

• working alongside the highway and cannot block a lane
• you are handling light loads
• the main boom is being lifted
• there is a load chart for this operation - Answer>>there is a

load chart for this operation A truck crane set up with the outriggers extended and set, and tires touching the ground, the operator should refer to what load

chart:

• intermediate chart
• over the front chart
• on rubber chart
• 85% of the main chart - Answer>>on rubber chart

Blocking paced under the ends of crawler tracks will:

• increase the crane's stability when operating over front or back
• increase the crane's stability when operating over side 1 / 2

• stop crane from traveling unexpectedly

d)stop crane from sliding unexpectedly - Answer>>increase the crane's stability when operating over front or back What quadrant produces the least amount of ground pressure on

a lattice crawler:

• corner
• side
• front
• rear - Answer>>side

During assembly where should you attach slings to lift boom

sections:

• to the top of main chords
• to the top end fittings
• 2 feet from end of section
• center of boom section - Answer>>to the top end fittings

When a lattice boom truck crane is set up on outriggers, the floats

or pads should always be:

• large enough to support two times the applied load
• with the tires firmly on the ground
• secured to the outriggers
• placed on the mats - Answer>>secured to the outriggers

A truck crane operating with outriggers fully extended and set, but

does not have a front outrigger, the operator should:

• operate over the front with caution
• refer to the manufacturer's working area diagram
• block under the bumper to provide more stability
• only operate over the front at a 50% reduction of the load chart
• Answer>>refer to the manufacturer's working area diagram

When a crane is operating on properly set outriggers, the tipping

axis is located at the:

• / 2