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29 Cards in this Set
- Front
- Back
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1. One a lattice boom crawler crane, the main boom length is measured from the
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A. Center of the boom heel pins to the center of the boom tip sheave.
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2. What is the main purpose of mid point suspension pendants?
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A. To relieve the load on the bottom when it is being raised.
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3. The main purpose of a gantry or a mast on a crane is:
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C. To increase the crane's leverage on the boom.
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4. What effect does having the crawlers retracted have on a crawler crane with long boom?
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A. Decrease structural capacity.
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5. When using a mobile crane on a barge, the crane's load capacity chart shall be
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B. Replaced by a list chart.
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6. Blocking can be placed under the ends of tracks to
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D. Increase the crane's stability when operating over front or back.
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7. A crawler crane is based on _____stability of static load.
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C. 75%
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8. What quadrant produces the least amount of ground pressure on a lattice crawler?
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A. Side
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9. When a crawler is crane on a barge the list chart must be provided by the
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D. Superintendent.
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10. When operating a crawler crane, the ground pressure will always be highest over the
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A. Corner
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11. Unless working in loose soft soil, a crawler crane should always travel ___on pick and carry operations.
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B. Towards the load
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12. Why use mats of cribbing?
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B. To reduce ground pressure.
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13. Mats are usually ____to hold together.
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A. Bolted
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14. A crawler crane traveling forward is defined as traveling in the direction of
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D. The idler
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15. When disassembling or assembling booms on lattice boom cranes, it is extremely important to
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D. Never touch any pin on any boom section located between the pendant attachment points and the crane.
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16. A crane with 100 foot boom will be operating at a 41-ft. radius. The load chart shows an entry indicating 25,000 lbs. at a 40-ft. radius, followed immediately by an entry listing 21,000 lbs. a 45-ft radius. What is the crane's capacity at the 41-ft. radius?
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A. 21,000 lbs.
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17. A crane requires fourth gear to climb a one-mile hill with a 7% grade. Which of the following is a correct about driving the crane back down the hill?
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C. Either fourth or fifth gear should be used.
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18. On a lattice boom crane, the device that automatically stops the boom when it nears the maximum angle is the
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A. Boom hoist kick-out.
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19. When is it safe to handle loads under power lines?
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D. No part of the crane of load can come closer to the power lines than regulations allow.
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20. Manufacture specifications only permit a certain amount of boom to be suspended out past the connection point of the pendants during assembly or disassembly of the boom. The portion of boom is called the
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B. Cantilever length.
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21. A correct statement about installing a pin-connected lattice boom on mobile crane is that the
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A. Boom hoist pawl should be used during the installation.
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22. On a lattice boom truck crane, boom angle is measured between the centerline of the
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C. Loaded boom and the horizontal.
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23. If the angle from the jib to the ground is changed from 50 degrees to 40 degrees, the operator has
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A. Decreased the capacity of the jib.
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24. When a carrier-mounted lattice boom crane is operating on properly set outriggers, then axis is located at the
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D. Point where the outriggers touch the ground.
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25. Swinging a fixed-length boom to a different quadrant increases the possibility of tipping over backward in a crane that is working on
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C. Tires at a short radius.
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26. When leveling a crane on outriggers, check the level in one direction, then rotate the upper works
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A. 90 degrees and recheck.
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27. When making a lift with a lattice boom crawler crane, ground pressure can be reduced by lifting over the
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D. Side.
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28. Pendant spreader bars on long booms are used to prevent
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A. Main pendants from scrubbing the boom sides.
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29. What effect does having the crawlers retracted have on a crawler crane with a long boom?
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B. Decrease in capacity.
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