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Mobile Crane Operator Core Review Questions, Exams of Operating Systems

Hagerstown Community CollegeOperating Systems

Mobile Crane Operator Core Review Questions

Typology: Exams

2024/2025

Available from 06/18/2025

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Mobile Crane Operator Core Review Questions
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1. Distribute over a larger area.: What is the purpose of placing mats or cribbing
under outrigger floats?
2. Upperworks.: Where is the best location for leveling a crane?
3. there is no weight of the crane bearing on any tires: Before leveling a mobile
crane on outriggers, an operator should ensure:
4. Operating a mobile crane with a long boom, on uneven ground, what sup-
port condition should be considered?: Keeping a 90° angle between cylinder rod
and pad.
5. Operating a mobile crane with a long boom, on uneven ground, what sup-
port condition should be considered?: Keeping 90° angle between cylinder rod
and pad.
6. When may blocking (cribbing) be placed under outrigger beams on mobile
cranes?: Never approved.
7. Mobile cranes should be level to within what percent of grade?: 1%
8. Timber crane mats work best when they are:: bolted together.
9. When arriving in the crane at the job site, the operator should first determine
the condition of the:: access roads.
10. What surface listed below would NOT be a good location for assembly or
setup of a mobile crane?: Above underground vaults.
11. Each outrigger pad and its blocking should be sufficient to support?: The
total weight of the crane and its load.
12. How does high wind affect a mobile crane with a long boom?: Introduces
side load onto the boom
13. When is the only time the outrigger beams should be less than fully
extended?: The load chart indicates that this is allowed.
14. What is the primary purpose for a rooster sheave or auxiliary boom point
sheave?: Separate the load hoist lines.
15. Eccentric main boom tip reeving causes which of the following:: twisting of
the main boom.
16. Which type of wire rope listed below is installed on most cranes?: Right
regular lay.
17. The hoist drum flange shall extend a minimum of over the top
layer of wire rope at all times while crane is in operation.: 1/2 inch.
18. Which of the following is classified as a standing wire rope?: Pendant line.
19. When lifting on outriggers, the floats or pads should always be:: secured
to the outriggers cylinder.
20. How many randomly broken wires in a lay length must there be on a mobile
cranes hoist line, before it should be removed from service?: 6
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  1. Distribute over a larger area.: What is the purpose of placing mats or cribbing under outrigger floats?
  2. Upperworks.: Where is the best location for leveling a crane?
  3. there is no weight of the crane bearing on any tires: Before leveling a mobile crane on outriggers, an operator should ensure:
  4. Operating a mobile crane with a long boom, on uneven ground, what sup- port condition should be considered?: Keeping a 90° angle between cylinder rod and pad.
  5. Operating a mobile crane with a long boom, on uneven ground, what sup- port condition should be considered?: Keeping 90° angle between cylinder rod and pad.
  6. When may blocking (cribbing) be placed under outrigger beams on mobile cranes?: Never approved.
  7. Mobile cranes should be level to within what percent of grade?: 1%
  8. Timber crane mats work best when they are:: bolted together.
  9. When arriving in the crane at the job site, the operator should first determine the condition of the:: access roads.
  10. What surface listed below would NOT be a good location for assembly or setup of a mobile crane?: Above underground vaults.
  11. Each outrigger pad and its blocking should be sufficient to support?: The total weight of the crane and its load.
  12. How does high wind affect a mobile crane with a long boom?: Introduces side load onto the boom
  13. When is the only time the outrigger beams should be less than fully extended?: The load chart indicates that this is allowed.
  14. What is the primary purpose for a rooster sheave or auxiliary boom point sheave?: Separate the load hoist lines.
  15. Eccentric main boom tip reeving causes which of the following:: twisting of the main boom.
  16. Which type of wire rope listed below is installed on most cranes?: Right regular lay.
  17. The hoist drum flange shall extend a minimum of over the top layer of wire rope at all times while crane is in operation.: 1/2 inch.
  18. Which of the following is classified as a standing wire rope?: Pendant line.
  19. When lifting on outriggers, the floats or pads should always be:: secured to the outriggers cylinder.
  20. How many randomly broken wires in a lay length must there be on a mobile cranes hoist line, before it should be removed from service?: 6
  1. What is the minimum design factor required for a right regular lay, boom or hoist wire rope?: 3.
  2. On a mobile crane, how many broken wires are permitted at the end connection of a pendant before it must be taken out of service?: 1
  3. Type 1 rotation resistant hoist wire rope has a design factor of:: 5 to 1
  4. It is important to know when lubricating crane hoist wire rope, that the lubricant must:: not hinder visual inspection.
  5. How often is the competent person required to inspect the running wire ropes on a mobile crane?: Each shift.
  6. On mobile cranes, how many broken wires must be present in one strand of one lay for running wire rope to be removed from service?: 3
  7. How many randomly distributed broken wires in rotation-resistant hoist wire rope are considered for replacement?: 2 broken wires in 6 rope diameters.
  8. According to OSHA, what is the minimum number of full wraps of wire rope that must remain on hoist drums in all service conditions?: 2
  9. On whose recommendations should a mobile crane preventative maintenance program be developed?: Crane manufacturer.
  10. On a mobile crane, the measurement for the load radius is the distance from the center of gravity of the suspended load to the:: center of rotation of the crane.
  11. On a mobile crane, should the load be applied when determining the proper boom angle?: Yes.
  12. On a mobile cranes range diagram, boom length and boom angle can be used to determine?: Load radius.
  13. On a mobile crane, what is the weight of the stowed jib that is deducted in load chart calculations called?: Effective weight.
  14. When determining boom tip elevation for a mobile crane, the user could:- : use the range diagram.
  15. The term net capacity is best defined by which of the terms listed below?- : Gross capacity minus capacity deductions.
  16. When lifting off the main boom, how is the effective weight of the fly/jib different in the erected position from that of the stowed position?: Effective weight increases.
  17. Mobile cranes that are setup on barges, shall have a list chart provided by which of the entities listed below?: Manufacturer.
  18. When lifting loads on tires, mobile cranes are rated at what percentage of tipping?: 75%.
  19. How does the effective weight of a stowed extension relate to the actual weight of the extension?: Lower than the actual weight.
  1. When determining the position to a mobile crane should be left in night, with high winds in the forecast the operator should:: follow manufacturers recommendations.
  2. When performing a multiple crane lift it is important for the operator's of each crane to understand that:: the weight may increase if the other crane lands the load.
  3. When lifting loads that are submerged under water with a mobile crane, what is one of the conditions that the operator should be familiar with?: Load will increase when lifting the load out of the water.
  4. When lifting over water with a personnel platform, what are the occupant of the platform required to wear?: A flotation device.
  5. If a mobile crane is NOT set-up level and the operator swings the load from the high side to the low side, what effect will that have on the radius?: The radius increase.
  6. Increasing the distance from the crane's center of gravity to the tipping axis will have what effect on a mobile crane?: Increase stability.
  7. Backward stability of a mobile crane is tested in which configuration listed below?: Basic boom at maximum angle with no load.
  8. What is the minimum pitch diameter used for sheaves in a boom hoist reeving system using rotation resistant wire rope?: Not less than 18 times rope diameter.
  9. When can capacity altering modifications be made to mobile cranes?: - When permission is given by the crane manufacturer.
  10. A crane is at the point of instability when the crane's leverage on the load equals:: 100% of the load's leverage on crane.
  11. Who must determine maximum speed for a mobile crane to travel with a suspended load?: The competent person.
  12. Deflection of the boom while operating a mobile crane will increase?: Load radius.
  13. A sudden start or stop of the hoisting function while operating a mobile crane can produce a:: dynamic load.
  14. When traveling with a suspended load on a mobile crane climbing an incline, the load should be carried in which direction?: Uphill.
  15. Which mobile crane boom configuration can cause the most hazardous side-loading condition for the crane?: Long boom with minimum radius.
  16. When preparing to hoist a load, the load block hook should be positioned:- : directly above the load's center of gravity.
  17. When making a lift on outriggers, the maximum ground-bearing pressure occurs in which boom position?: Over the corner.
  1. when personal platforms are hoisted with a mobile crane what item listed below must be provided?: An anti two-block device.
  2. Personnel platforms suspended on the hook of a mobile crane, must not exceed what percentage of a crane's capacity at any given radius?: 50%
  3. When proof testing a personnel platform to 125% of its rated capacity, how long must the platform be suspended?: 5 minutes.
  4. Which of the following correctly states the requirements for hooks used to hoist employees on a crane-supported personnel platform?: Hooks shall have a latch that closes and locks.
  5. OSHA permits hoisting of personnel by a crane as long as the employer can show:: there is no less hazardous or practicable way.
  6. Before lifting an occupied personnel platform on a jobsite the crew must ensure they perform which of the following?: All the Above: a) Must attend a pre-lift meeting. b) Must fully deploy all outriggers. c) Must perform a trial lift.
  7. Before lifting an occupied personnel platform on a jobsite, which of the following applies?: All the Above: a) Must use 50% of cranes rated capacity. b) Must trial lift anticipated load weight. c) Must ensure rigging is dedicated to platform only.
  8. Which of the following standards or regulations governs the lifting of personnel in construction?: OSHA 1926.
  9. According to OSHA 1926.1431, which device listed below must be attached to the crane?: Anti-two-block.
  10. According to OSHA 1926.1431, which of these hoist options is prohibited?- : Hoist free fall.
  11. Inside the personnel platform except for gates, how much of the perimeter must contain a grab rail for the occupants?: 100%
  12. AcCording to OSHA 1926.1431, during personnel platform hoisting operations, access gates shall NOT Swing in which direction?: Outward.
  13. oSHA 1926.1431 states that tag lines must be used:: when necessary to control platform.
  14. According to OSHA 1926.1431, while hoisting a personnel platform, what weather condition listed below will promptly discontinue the operation?: Dan- gerous.
  15. While hoisting employees in a personnel platform, direct communication must be maintained between the signal person and who?: Operator.

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  1. Loads rigged using a basket hitch should be to prevent slippage- : Balanced.
  2. When slings encounter sharp edges on loads to be lifted, riggers shall ensure that slings are:: protected or padded.
  3. According to OSHA, quadruple sling bridle ratings are the same as:: triple sling bridle ratings.
  4. When correctly installing U-bolt type wire rope clips, the U portion of the clip shall be on:: the dead or short end.
  5. Which statement listed below is correct about basic load rigging?: As horizontal load angle decreases, stress increases.
  6. The approximate percentage of strength of choker, vertical, and basket hitches respectively are:: 75%, 100% 200%.
  7. According to ASME which of the following listed below shall NOT be used for the suspension system on suspended personnel platforms?: Synthetic web bridle.
  8. When rigging a bundle of pipe or tubing, which of the following would provide the best contact between sling and load?: Double wrap choker.
  9. What is the angle between the top of the load and the sling leg referred to in sling load charts?: Horizontal sling angle.
  10. When installing a wedge socket, it must be attached with the load line pulling in a straight line from the:: pin.
  11. For any sign other than emergency stop, who is permitted to give hand signals to the crane operator during a lift?: A qualified signal person.
  12. Select the correct OSHA Standard Method Hand Signal that m illustration:

Move slowly.:

  1. Select the correct OSHA Standard Method Hand Signal that mat illustration:

Use whipline.:

  1. What is the first element of voice signals given to a crane operator prior to the lift?: Function and Direction.
  2. According to OSHA, each series of voice signals contain how many elements?: Three.

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  1. Select the correct OSHA Standard Method Hand Signal that m illustration:

Lower.:

  1. Select the correct OSHA Standard Method Hand Signal that m illustration:

Swing.:

  1. Select the correct OSHA Standard Method Hand Signal that m illustration:

Lower boom and raise boom.:

  1. Select the correct OSHA Standard Method Hand Signal that m illustration:

Emergency Stop.:

  1. Select the correct OSHA Standard Method Hand Signal that m illustration:

Lower boom.:

  1. Select the correct OSHA Standard Method Hand Signal that ma illustration:

Dog Everything.:

  1. Select the correct OSHA Standard Method Hand Signal that m illustration: