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20 Cards in this Set

  • Front
  • Back

This is not a mobile construction crane...

Gantry

The width between the crawler tracks affects the _______ of a crawler crane.

Stability

Truck cranes can climb a job site ramp of up to _____ percent grade.

40

Rough terrain carriers should travel at speeds of about ____miles per hour or below...

30

The boom base of a crane is sometimes called the ______

Boom butt

The part of a crane used to balance the load is a _______

Counterweight

A lattice boom is supported by a network of wire ropes or lines called ______

Pendants

Boom torque caused by running the lift line near one side of the boom ________

will cause sheave and line wear

The weight bearing capacity of compacted sand and gravel is ___ pounds per square inch

110

The weight bearing capacity of cemented sand and gravel is ___ psi

135

The weight bearing capacity of compacted clay is ___ psi

54

The ground pressure under an outrigger can be much greater than that under a track on similar lifts due to

the smaller bearing surface

A wheeled crane is considered to be operating on ___ when in a pick and carry mode

Rubber

A point on an object around which the weight is concentrated is the ____

center of gravity

Lifts over the ____ of the crane are not permitted with most truck mounters cranes

front

The boom angle is the angle between the boom center line and ______

horizontal

Dragging a load along the ground will cause ____

side loading

A critical lift plan must include all of the following except the ____

tipping fulcrum

Cranes have brakes that can hold ____ times the rated load

1.5

When loading a crane on a low boy, flat bed trailer, or railroad flat car, carry the boom at a _____

low angle and uphill