CCO PRACTICE EXAM QUESTIONS & ANSWERS
100% CORRECT!!
When working on rubber, cranes are rated at what percentage of tipping:
a) 70%
b) 75%
c) 80%
d) 85% - ANSWER75%
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 - ANSWERthere 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 - ANSWERon 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 - ANSWERincrease 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 - ANSWERside
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 - ANSWERpoint where the outriggers touch the
ground
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 - ANSWERdistribute the downward force of the float over
a larger area
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 - ANSWERto 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 - ANSWERsecured to the outriggers
A truck crane operating with outriggers fully extended and set, but does not have a front outrigger,
the operator should:
100% CORRECT!!
When working on rubber, cranes are rated at what percentage of tipping:
a) 70%
b) 75%
c) 80%
d) 85% - ANSWER75%
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 - ANSWERthere 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 - ANSWERon 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 - ANSWERincrease 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 - ANSWERside
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 - ANSWERpoint where the outriggers touch the
ground
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 - ANSWERdistribute the downward force of the float over
a larger area
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 - ANSWERto 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 - ANSWERsecured to the outriggers
A truck crane operating with outriggers fully extended and set, but does not have a front outrigger,
the operator should:
