CCO PRACTICE EXAM QUESTIONS AND
ANSWERS RATED A+
When working on rubber, cranes are rated at what percentage of tipping:
a) 70%
b) 75%
c) 80%
d) 85% - CORRECT ANSWER-75%
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 - CORRECT 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:
a) intermediate chart
b) over the front chart
c) on rubber chart
d) 85% of the main chart - CORRECT ANSWER-on rubber chart
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 - CORRECT 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:
a) corner
b) side
c) front
d) rear - CORRECT ANSWER-side
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 - CORRECT ANSWER-to the top end fittings
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 - CORRECT 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:
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 - CORRECT
ANSWER-refer to the manufacturer's working area diagram
ANSWERS RATED A+
When working on rubber, cranes are rated at what percentage of tipping:
a) 70%
b) 75%
c) 80%
d) 85% - CORRECT ANSWER-75%
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 - CORRECT 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:
a) intermediate chart
b) over the front chart
c) on rubber chart
d) 85% of the main chart - CORRECT ANSWER-on rubber chart
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 - CORRECT 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:
a) corner
b) side
c) front
d) rear - CORRECT ANSWER-side
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 - CORRECT ANSWER-to the top end fittings
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 - CORRECT 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:
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 - CORRECT
ANSWER-refer to the manufacturer's working area diagram
