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CCO PRACTICE EXAM Study for
Crane Questions with Detailed Verified
Answers
Question: When working on rubber, cranes are rated at what percentage of
tipping:
a) 70%
b) 75%
c) 80%
d) 85%
Answer: 75%
Question: 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
Answer: there is a load chart for this operation
Question: 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
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d) 85% of the main chart
Answer: on rubber chart
Question: 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
Answer: increase the crane's stability when operating over front or back
Question: What quadrant produces the least amount of ground pressure on
a lattice crawler:
a) corner
b) side
c) front
d) rear
Answer: side
Question: 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
Answer: to the top end fittings
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Question: 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
Answer: secured to the outriggers
Question: 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
Answer: refer to the manufacturer's working area diagram
Question: 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
Answer: point where the outriggers touch the ground
Question: The purpose of placing mats or cribbing under outrigger floats is
to:
a) get the tires off the ground
CCO PRACTICE EXAM Study for
Crane Questions with Detailed Verified
Answers
Question: When working on rubber, cranes are rated at what percentage of
tipping:
a) 70%
b) 75%
c) 80%
d) 85%
Answer: 75%
Question: 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
Answer: there is a load chart for this operation
Question: 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
, Page | 2
d) 85% of the main chart
Answer: on rubber chart
Question: 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
Answer: increase the crane's stability when operating over front or back
Question: What quadrant produces the least amount of ground pressure on
a lattice crawler:
a) corner
b) side
c) front
d) rear
Answer: side
Question: 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
Answer: to the top end fittings
, Page | 3
Question: 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
Answer: secured to the outriggers
Question: 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
Answer: refer to the manufacturer's working area diagram
Question: 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
Answer: point where the outriggers touch the ground
Question: The purpose of placing mats or cribbing under outrigger floats is
to:
a) get the tires off the ground
