NCCCO Mobile Crane Exam.
NCCCO Mobile Crane Exam.
1. What action does a signal person intend the operator to perform if he extends his arm at
shoulder height, makes a fist with his hand, and sticks his/her thumb up?
o a) Boom down
o b) Swing
o c) Boom up
o d) Extend boom
o Answer: c) Boom up
2. When hoisting personnel, within what percentage of level must a telescopic boom crane be in
order for the gross ratings in the load chart to remain valid?
o a) 1%
o b) 2%
o c) 5%
o d) 8%
o Answer: a) 1%
3. The load line of the crane you’re operating contacts an energized power line. There’s no sign
of any other danger, such as fire. What should you do?
o a) Climb down carefully from the crane cab
o b) Jump down, feet together
o c) Stay in the cab until the lines are de-energized
o d) Get as far away from the crane as possible
o Answer: c) Stay in the cab until the lines are de-energized
4. According to OSHA 1926.1413, how many randomly distributed broken wires in rotation-
resistant rope are cause for replacement of the rope?
o a) 1 broken wire in 6 rope diameters
o b) 2 broken wires in 30 rope diameters
o c) 3 broken wires in one strand in one lay
, NCCCO Mobile Crane Exam.
o d) 2 broken wires in 6 rope diameters
o Answer: d) 2 broken wires in 6 rope diameters
5. What is the net capacity of a crane on main boom unless the manufacturer states otherwise?
o a) The capacity listed in the load chart minus the weight of the rigging and all
attachments
o b) The capacity listed in the load chart plus the weight of the rigging and all attachments
o c) The capacity listed in the load chart minus the weight of the rigging and all
attachments not in use
o d) The capacity listed in the load chart minus the weight of the rigging alone
o Answer: a) The capacity listed in the load chart minus the weight of the rigging and all
attachments
6. What is the primary purpose of a load moment indicator (LMI) on a mobile crane?
o a) To measure the wind speed
o b) To indicate the angle of the boom
o c) To prevent the crane from tipping by monitoring the load moment
o d) To measure the length of the boom
o Answer: c) To prevent the crane from tipping by monitoring the load moment
7. Which of the following is NOT a factor in determining the load capacity of a mobile crane?
o a) Boom length
o b) Load radius
o c) Wind speed
o d) Operator’s experience
o Answer: d) Operator’s experience
8. What should be done if a crane’s load chart is missing or illegible?
o a) Operate the crane using estimated capacities
o b) Use a similar crane’s load chart
o c) Do not operate the crane until a proper load chart is available
o d) Operate the crane at half capacity
o Answer: c) Do not operate the crane until a proper load chart is available
9. What is the purpose of the anti-two block device on a crane?
, NCCCO Mobile Crane Exam.
o a) To prevent the boom from extending too far
o b) To prevent the hook block from contacting the boom tip
o c) To measure the load weight
o d) To stabilize the crane during operation
o Answer: b) To prevent the hook block from contacting the boom tip
10. When setting up a crane, what is the minimum distance that must be maintained from power
lines up to 50 kV?
o a) 10 feet
o b) 15 feet
o c) 20 feet
o d) 25 feet
o Answer: a) 10 feet
11. What is the maximum allowable wind speed for lifting operations with most mobile cranes?
o a) 10 mph
o b) 20 mph
o c) 30 mph
o d) 40 mph
o Answer: b) 20 mph
12. Which of the following is a critical lift?
o a) A lift that exceeds 75% of the crane’s rated capacity
o b) A lift that involves multiple cranes
o c) A lift over occupied buildings
o d) All of the above
o Answer: d) All of the above
13. What should an operator do if the crane’s boom starts to oscillate during a lift?
o a) Increase the boom angle
o b) Lower the load slowly
o c) Swing the boom to stabilize it
o d) Stop all crane movements immediately
NCCCO Mobile Crane Exam.
1. What action does a signal person intend the operator to perform if he extends his arm at
shoulder height, makes a fist with his hand, and sticks his/her thumb up?
o a) Boom down
o b) Swing
o c) Boom up
o d) Extend boom
o Answer: c) Boom up
2. When hoisting personnel, within what percentage of level must a telescopic boom crane be in
order for the gross ratings in the load chart to remain valid?
o a) 1%
o b) 2%
o c) 5%
o d) 8%
o Answer: a) 1%
3. The load line of the crane you’re operating contacts an energized power line. There’s no sign
of any other danger, such as fire. What should you do?
o a) Climb down carefully from the crane cab
o b) Jump down, feet together
o c) Stay in the cab until the lines are de-energized
o d) Get as far away from the crane as possible
o Answer: c) Stay in the cab until the lines are de-energized
4. According to OSHA 1926.1413, how many randomly distributed broken wires in rotation-
resistant rope are cause for replacement of the rope?
o a) 1 broken wire in 6 rope diameters
o b) 2 broken wires in 30 rope diameters
o c) 3 broken wires in one strand in one lay
, NCCCO Mobile Crane Exam.
o d) 2 broken wires in 6 rope diameters
o Answer: d) 2 broken wires in 6 rope diameters
5. What is the net capacity of a crane on main boom unless the manufacturer states otherwise?
o a) The capacity listed in the load chart minus the weight of the rigging and all
attachments
o b) The capacity listed in the load chart plus the weight of the rigging and all attachments
o c) The capacity listed in the load chart minus the weight of the rigging and all
attachments not in use
o d) The capacity listed in the load chart minus the weight of the rigging alone
o Answer: a) The capacity listed in the load chart minus the weight of the rigging and all
attachments
6. What is the primary purpose of a load moment indicator (LMI) on a mobile crane?
o a) To measure the wind speed
o b) To indicate the angle of the boom
o c) To prevent the crane from tipping by monitoring the load moment
o d) To measure the length of the boom
o Answer: c) To prevent the crane from tipping by monitoring the load moment
7. Which of the following is NOT a factor in determining the load capacity of a mobile crane?
o a) Boom length
o b) Load radius
o c) Wind speed
o d) Operator’s experience
o Answer: d) Operator’s experience
8. What should be done if a crane’s load chart is missing or illegible?
o a) Operate the crane using estimated capacities
o b) Use a similar crane’s load chart
o c) Do not operate the crane until a proper load chart is available
o d) Operate the crane at half capacity
o Answer: c) Do not operate the crane until a proper load chart is available
9. What is the purpose of the anti-two block device on a crane?
, NCCCO Mobile Crane Exam.
o a) To prevent the boom from extending too far
o b) To prevent the hook block from contacting the boom tip
o c) To measure the load weight
o d) To stabilize the crane during operation
o Answer: b) To prevent the hook block from contacting the boom tip
10. When setting up a crane, what is the minimum distance that must be maintained from power
lines up to 50 kV?
o a) 10 feet
o b) 15 feet
o c) 20 feet
o d) 25 feet
o Answer: a) 10 feet
11. What is the maximum allowable wind speed for lifting operations with most mobile cranes?
o a) 10 mph
o b) 20 mph
o c) 30 mph
o d) 40 mph
o Answer: b) 20 mph
12. Which of the following is a critical lift?
o a) A lift that exceeds 75% of the crane’s rated capacity
o b) A lift that involves multiple cranes
o c) A lift over occupied buildings
o d) All of the above
o Answer: d) All of the above
13. What should an operator do if the crane’s boom starts to oscillate during a lift?
o a) Increase the boom angle
o b) Lower the load slowly
o c) Swing the boom to stabilize it
o d) Stop all crane movements immediately
