NCCCO MOBILE CRANE QUESTION AND CORRECT ANSWER

NCCCO MOBILE CRANE QUESTION AND CORRECT ANSWER 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 - CORRECT ANSWER-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% - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-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 - CORRECT ANSWER-a. 6. 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 - CORRECT ANSWER-a. 7. What Standard Method hand signal is being illustrated? a. Swing b. Stop c. Emergency Stop d. Travel - CORRECT ANSWER-a. 8. Who should an operator respond to a "stop" signal from? a. Appointed signal person only b. Project manager only c. Superintendent only d. Anyone - CORRECT ANSWER-d. 9. 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 - CORRECT ANSWER-c. 10. 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 c. The distance from the center of rotation of the crane to the center of the load d. The distance from the center of rotation of the crane to the center of gravity of the load - CORRECT ANSWER-d. 11. What applies to the capacities below the bold line shown on a load chart? a. They are based on the structural strength of the crane b. They must not be used c. They are based on the stability of the crane d. They should only be used if the crane is set up on outriggers - CORRECT ANSWERc. 12. In which quadrant are rough terrain crane capacities generally greater? a. Over the front b. Over the rear c. Over the right side d. Over the left side - CORRECT ANSWER-a. 13. According to federal requirements, under what conditions is it okay for a person to ride the headache ball? a. When there is no other way to gain access b. When the lift has been approved by an engineer c. When other means would be more dangerous d. It is never okay - CORRECT ANSWER-d. 14. By what percentage do most manufacturers require a crane's load chart capacity to be reduced by for duty cycle operations such as high-volume concrete placement? a. 10%. b. 15%. c. 20%. d. 30%. - CORRECT ANSWER-c. 15. From which two points should the boom be measured? a. From the base of the boom to the center of the boom tip sheave b. From the boom hinge pins to the boom tip c. From the boom hinge pins to the center of the boom tip sheaved. d. From the base of the boom to the boom tip - CORRECT ANSWER-c. 16. 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 - CORRECT ANSWER-c. 17. 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. - CORRECT ANSWER-b. 18. 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 - CORRECT ANSWER-c. 19. What is the OSHA regulation governing cranes in construction? a. 1910.180 b. 1926.1400 c. 1926.556 d. 1910.184 - CORRECT ANSWER-b. 20. 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 - CORRECT ANSWER-a. 21. 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 - CORRECT ANSWER-b. 22. 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% - CORRECT ANSWER-b. 23. 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% - CORRECT ANSWER-b. 24. 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 - CORRECT ANSWER-d. 25. 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) - CORRECT ANSWER-c. 26. 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 - CORRECT ANSWER-d. 27. 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 c. Reduces the capacity of the crane d. Makes the crane less stable - CORRECT ANSWER-b.