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CCO PRACTICE EXAM Study for Crane
Questions and Answers (Expert Solutions)
Q: When working on rubber, cranes are rated at what percentage of tipping:
a) 70%
b) 75%
c) 80%
d) 85%, 🗹🗹: 75%
Q: When a crane is working "on outriggers" the only time they should be less than fully
extended is when:
a) working alongside the highway and cannot block a lane
b) you are handling light loads
c) the main boom is being lifted
d) there is a load chart for this operation, 🗹🗹: there is a load chart for this operation
Q: A truck crane set up with the outriggers extended and set, and tires touching the
ground, the operator should refer to what load chart:
a) intermediate chart
b) over the front chart
c) on rubber chart
d) 85% of the main chart, 🗹🗹: on rubber chart
Q: Blocking paced under the ends of crawler tracks will:
a) increase the crane's stability when operating over front or back
b) increase the crane's stability when operating over side
c) stop crane from traveling unexpectedly
d)stop crane from sliding unexpectedly, 🗹🗹: increase the crane's stability when
operating over front or back
Q: What quadrant produces the least amount of ground pressure on a lattice crawler:
a) corner
b) side
c) front
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d) rear, 🗹🗹: side
Q: During assembly where should you attach slings to lift boom sections:
a) to the top of main chords
b) to the top end fittings
c) 2 feet from end of section
d) center of boom section, 🗹🗹: to the top end fittings
Q: When a lattice boom truck crane is set up on outriggers, the floats or pads should
always be:
a) large enough to support two times the applied load
b) with the tires firmly on the ground
c) secured to the outriggers
d) placed on the mats, 🗹🗹: secured to the outriggers
Q: A truck crane operating with outriggers fully extended and set, but does not have a
front outrigger, the operator should:
a) operate over the front with caution
b) refer to the manufacturer's working area diagram
c) block under the bumper to provide more stability
d) only operate over the front at a 50% reduction of the load chart, 🗹🗹: refer to the
manufacturer's working area diagram
Q: When a crane is operating on properly set outriggers, the tipping axis is located at the:
a) radius of the counterweight
b) center pin of the crane
c) boom heel pins
d) point where the outriggers touch the ground, 🗹🗹: point where the outriggers
touch the ground
Q: The purpose of placing mats or cribbing under outrigger floats is to:
a) get the tires off the ground
b) distribute the downward force of the float over a larger area
c) allow the float to be level
d) raise the operator's cab for better vision, 🗹🗹: distribute the downward force of
the float over a larger area
Q: A crane loses stability when its leverage on the load is:
a) less than a load's leverage on the crane
CCO PRACTICE EXAM Study for Crane
Questions and Answers (Expert Solutions)
Q: When working on rubber, cranes are rated at what percentage of tipping:
a) 70%
b) 75%
c) 80%
d) 85%, 🗹🗹: 75%
Q: When a crane is working "on outriggers" the only time they should be less than fully
extended is when:
a) working alongside the highway and cannot block a lane
b) you are handling light loads
c) the main boom is being lifted
d) there is a load chart for this operation, 🗹🗹: there is a load chart for this operation
Q: A truck crane set up with the outriggers extended and set, and tires touching the
ground, the operator should refer to what load chart:
a) intermediate chart
b) over the front chart
c) on rubber chart
d) 85% of the main chart, 🗹🗹: on rubber chart
Q: Blocking paced under the ends of crawler tracks will:
a) increase the crane's stability when operating over front or back
b) increase the crane's stability when operating over side
c) stop crane from traveling unexpectedly
d)stop crane from sliding unexpectedly, 🗹🗹: increase the crane's stability when
operating over front or back
Q: What quadrant produces the least amount of ground pressure on a lattice crawler:
a) corner
b) side
c) front
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d) rear, 🗹🗹: side
Q: During assembly where should you attach slings to lift boom sections:
a) to the top of main chords
b) to the top end fittings
c) 2 feet from end of section
d) center of boom section, 🗹🗹: to the top end fittings
Q: When a lattice boom truck crane is set up on outriggers, the floats or pads should
always be:
a) large enough to support two times the applied load
b) with the tires firmly on the ground
c) secured to the outriggers
d) placed on the mats, 🗹🗹: secured to the outriggers
Q: A truck crane operating with outriggers fully extended and set, but does not have a
front outrigger, the operator should:
a) operate over the front with caution
b) refer to the manufacturer's working area diagram
c) block under the bumper to provide more stability
d) only operate over the front at a 50% reduction of the load chart, 🗹🗹: refer to the
manufacturer's working area diagram
Q: When a crane is operating on properly set outriggers, the tipping axis is located at the:
a) radius of the counterweight
b) center pin of the crane
c) boom heel pins
d) point where the outriggers touch the ground, 🗹🗹: point where the outriggers
touch the ground
Q: The purpose of placing mats or cribbing under outrigger floats is to:
a) get the tires off the ground
b) distribute the downward force of the float over a larger area
c) allow the float to be level
d) raise the operator's cab for better vision, 🗹🗹: distribute the downward force of
the float over a larger area
Q: A crane loses stability when its leverage on the load is:
a) less than a load's leverage on the crane
