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NCCCO Mobile Crane Operator Practice Exam 2025, Exams of Engineering

Duke UniversityEngineering

This practice exam prepares you for the NCCCO mobile crane certification with 40 multiple-choice questions. It covers crane operation, safety regulations, load chart interpretation, and hand signals. Each question includes the correct answer, aiding study. Topics include crane setup, load handling, power line safety, wire rope inspection, and personnel hoisting. Assess your knowledge of safety procedures and operational guidelines to ensure you're ready for certification. This tool helps demonstrate competence in mobile crane operation and adherence to industry best practices.

Typology: Exams

2024/2025

Available from 06/02/2025

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NCCCO MOBILE CRANE PRACTICE EXAM WITH
SOLUTIONS ALL CORRECT AND 2025 REVISED
GRADED A+.
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?
a. Boom down
b. Swing
c. Boom up
d. Extend boom - Solution c.
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?
a. 1%
b. 2%
c. 5%
d. 8% - Solution a.
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?
a. Climb down carefully from the crane cab
b. Jump down, feet together
c. Stay in the cab until the lines are de-energized
d. Get as far away from the crane as possible - Solution c.
4. According to OSHA 1926.1413, how many randomly distributed broken
wires in rotation-resistant rope are cause for replacement of the rope?
a. 1 broken wire in 6 rope diameters
b. 2 broken wires in 30 rope diameters
c. 3 broken wires in one strand in one lay
d. 2 broken wires in 6 rope diameters - Solution d.
5. What is the net capacity of a crane on main boom unless the
manufacturer states otherwise?
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NCCCO MOBILE CRANE PRACTICE EXAM WITH

SOLUTIONS ALL CORRECT AND 2025 REVISED

GRADED A+.

  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? a. Boom down b. Swing c. Boom up d. Extend boom - Solution c.
  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? a. 1% b. 2% c. 5% d. 8% - Solution a.
  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? a. Climb down carefully from the crane cab b. Jump down, feet together c. Stay in the cab until the lines are de-energized d. Get as far away from the crane as possible - Solution c.
  4. According to OSHA 1926.1413, how many randomly distributed broken wires in rotation-resistant rope are cause for replacement of the rope? a. 1 broken wire in 6 rope diameters b. 2 broken wires in 30 rope diameters c. 3 broken wires in one strand in one lay d. 2 broken wires in 6 rope diameters - Solution d.
  5. What is the net capacity of a crane on main boom unless the manufacturer states otherwise?

a. The capacity listed in the load chart minus the weight of the rigging and all attachments b. The capacity listed in the load chart plus the weight of the rigging and all attachments c. The capacity listed in the load chart minus the weight of the rigging and all attachments not in use d. The capacity listed in the load chart minus the weight of the rigging alone

  • Solution a.
  1. What may happen to a properly rigged load when lifted off the ground unless the operator takes account of boom deflection? a. It could swing out away from the crane b. It could swing in towards the crane c. It could raise absolutely vertically d. It could shift in its rigging - Solution a.
  2. What Standard Method hand signal is being illustrated? a. Swing b. Stop c. Emergency Stop d. Travel - Solution a.
  3. Who should an operator respond to a "stop" signal from? a. Appointed signal person only b. Project manager only c. Superintendent only d. Anyone - Solution d.
  4. Which area do truck cranes without a 5th outrigger generally have no lifting capacity unless the manufacturer states otherwise? a. The side b. The rear c. The front d. The outriggers - Solution c.
  5. What is the definition of "operating radius?" a. The distance from the base of the boom to the center of the load b. The distance from the front of the crane to the center of gravity of the load
  1. What is the preferred method of installing wire rope from a reel onto a hoist drum? a. The rope runs from the top of the reel to the bottom of the drum b. The rope runs from the bottom of the reel to the top of the drum c. The rope runs from the top of the reel to the top of the drum d. There is no preferred method - Solution c.
  2. Over which quadrant are truck crane capacities usually greater? a. Over the front. b. Over the rear. c. Over the front right outrigger. d. Over the side. - Solution b.
  3. According to OSHA, which accessible area of an operating crane must always be barricaded? a. The swing radius of the crane b. The carbody or chassis c. The swing radius of the rear of the rotating superstructure d. The distance between the car body or chassis and the boom tip - Solution c.
  4. What is the OSHA regulation governing cranes in construction? a. 1910. b. 1926. c. 1926. d. 1910.184 - Solution b.
  5. Under which circumstance is a crack in the windshield of a crane cab okay? a. As long as it causes no visible distortion that would interfere with safe operations b. As long as it is less than 6 inches long c. As long as the windshield is replaced on the next annual inspection d. It is never okay - Solution a.
  6. Under which circumstance does OSHA permits hoisting of personnel by crane? a. As long as the prevailing wind speed is less than 35 mph b. As long as there is no less hazardous or practicable way c. As long as all personnel have CPR training

d. As long as no aerial work platform is available - Solution b.

  1. Unless the manufacturer states otherwise, what crane capacity chart is appropriate when a crane is set up with 3 of its 4 outriggers extended and the fourth is retracted? a. On-outrigger chart b. On-rubber chart c. On-outrigger chart minus 20% d. On-rubber chart plus 20% - Solution b.
  2. According to OSHA, while hoisting personnel, the total load must not exceed what percentage of the crane's rated capacity?" a. 45% b. 50% c. 75% d. 85% - Solution b.
  3. When is side loading of crane booms permitted? a. When the operator says it's OK b. So long as no jib is installed c. Only when the outriggers are fully extended d. Only with freely suspended loads - Solution d.
  4. What is indicated if an operator makes two audible signals when moving a crane? a. He/she intends to stop b. He/she intends to back up c. He/she intends to go ahead d. He/she intends to stop (emergency) - Solution c.
  5. When may blocking (cribbing) be placed under outrigger beams? a. When beams cannot be extended all the way out b. To increase capacity c. To improve stability d. Never - Solution d.
  6. What is the result of placing timber blocking under the tips of the tracks on a crawler crane? a. Decreases the permitted capacity of the crane b. Makes the crane more stable
  1. How should the wheels of a crane be positioned when it is set up for working on outriggers? a. Just touching the ground b. As high as possible off the ground c. Just high enough off the ground to relieve the tires of crane weight d. Firmly on the ground to support the crane - Solution c.
  2. What happens to ground bearing pressure if you move a crawler crane from soft ground to harder ground? a. It increases b. It decreases by a third c. It remains the same d. It decreases by half - Solution a.
  3. When may a swivel be used with rotation resistant wire rope? a. Always b. Never c. If the rope manufacturer approves d. If the operator decides it's OK - Solution c.
  4. What should you do on pick and carry operations? a. Keep the boom as short as possible b. Keep the load as high above the ground as possible c. Ensure the load is as far from the carrier/carbody as possible d. Use maximum boom length - Solution a.
  5. What boom position would cause the greatest ground pressure when lifting with crawler cranes? a. Over the right side b. Over the end c. Over the corner d. over the left side - Solution c.
  6. Where should the hook be positioned when preparing to hoist a light load? a. Slightly to the side you're planning to swing to b. Slightly to the side opposite you plan to swing to c. Directly above the load's center of gravity d. Above the edge of the load closest to the crane - Solution c.
  1. According to OSHA 1926.1408, what minimum clearance must be maintained between any part of the crane/load and 850kV energized overhead power lines. a. 25 ft. b. 30 ft. c. 35 ft. d. 45 ft. - Solution d.
  2. How many parts of line are required to hoist a 36,500 lb. load if the maximum allowable line pull is 9,000 lb.? a. 3 b. 4 c. 5 d. 6 - Solution c.
  3. What determines the amount of deduction required for an erected jib that is not being used? a. The actual weight of the jib b. The effective weight of the jib c. Nothing, since the jib is not in use d. The difference between the crane's actual weight and its effective weight
  • Solution b.
  1. What capacity should you use when the boom length of the crane falls between the lengths listed in the load chart? a. The next longest boom length b. The next shortest boom length c. A length estimated between the lengths in the chart d. The next longest or the next shortest boom length, whichever is the lower capacity - Solution d.
  2. When is it okay to temporarily bypass a crane's overload warning system? a. When a supervisor tells you to b. When the load to be lifted exceeds the capacity in the chart c. Never d. During assembly/disassembly operations - Solution d.
  3. What happens to the leverage of the load on a crane as the boom is being lowered?

a. clear of sledge hammers b. out from under the boom c. on top of boom holding pendants d. in sight of the operator - Solution b.

  1. When may a crane be overloaded? a. When the supervisor says it's OK b. Never c. When testing the crane d. When proof testing a man basket - Solution c.
  2. When can the operator leave the crane? a. Break time b. End of the shift c. After securing the crane d. When a storm is coming - Solution b.
  3. When can a crane be side loaded? a. Dragging a load b. With a freely suspended load c. Never d. Pile-driving - Solution b.
  4. The deflection of a boom will cause the load to? a. side load the boom b.decrfrease the radius c. increase the radius d. have no effect - Solution c.
  5. When should tag lines be used? a. Always b. Always, except when the use of the tagline become hazardous c. Ehen the rotation of the load becomes hazardous d. When the operator cant see the load - Solution c.
  6. What shall be in the operators cab during crane operations? a. load charts b. Inspection reports c. Hand signal chart d. The crane log - Solution a.
  1. Which of the following is considered duty cycle work? a. Pile- driving b. Setting trusses c. Clam - Shell digging d Unloading trucks - Solution c.
  2. When doing cycle work, the load chart must be reduced by how much? a. 50% b. 20% c. 30% d. none - Solution b.
  3. Which components are not parts of the boom? a. Lacing b. Cords c. Cross members d. Heel pins - Solution d. Where must the operator's manual be kept during crane operations? - Solution The operator's manual must be kept in the cab at all times. According to ASME B30.5, what are the minimal requirements to meet crane operatorqualifications? - Solution Physical, Written Test, Practical Test What hand signal must be obeyed at all times? - Solution Stop When removing pins or bolts from a boom assembly, workers shall remain _________________. - Solution out from under the boom When may a crane be overloaded? - Solution Never When can the operator leave the crane? - Solution After securing the crane When can a crane be side loaded? - Solution With a freely suspended load

A long boom crane at a short radius and out of level by 300 can see a reduction incapacity by as much as: - Solution 50% Crane stability is based on - Solution lever principle What is the OSHA standard for cranes in construction industry? - Solution 29 CFR-1926. Subpart CC What are the requirements to be a crane inspector? - Solution Same as operator What percentage of the crane chart is considered a critical lift? - Solution 75% A multi crane lift shall require - Solution Critical lift plan, reduction of gross capacity by 25% and one designated person in charge. When doing a pick and carry, tire pressure must - Solution meet manufacturer's specifications The load chart is matched to the crane by: - Solution Serial number Where do you find recommended reeving for the hoist lines? - Solution Owner's manual Not extending telescoping boom sections equally; what may occur? - Solution Longer section collapse What are the broken wire removal requirements for rotation resistant wire rope? - Solution 2 broken wires in 6 diameters or 4 in 30 diameters How should wire rope be inspected during a frequent inspection? - Solution Visually What is the object of rope lubrication? - Solution A and B What is the design factor for rotation resistant rope used as a hoist line? - Solution 5:

The load hoist drum flange shall be _________________. - Solution 1/ in. or higher over the top layer of rope With the hook in the extreme low position, how many wraps shall remain on the load hoist drum? - Solution 2 Load hoist sheaves and boom tip sheave shall have pitch diameters not less than times the nominal diameter of the rope used. - Solution 18 Per ANSI B30.5, when operating near high voltage line of 250 KV the minimum clearance is ___________________. - Solution 20 FT Per ANSI B30.5, when in transit under power lines of 350 KV the minimum clearance is? - Solution 16 FT