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Cranes > 2020-2021 > Flashcards

2020-2021 Flashcards

1
Q

The first recorded use of cranes is found in the history of Ancient Greece, around the___century

A

Fifth

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2
Q

In first century A.D., treadmills were powered by______

A

Humans

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3
Q

Industrial cranes have____centers of gravity to permit operation in narrow aisles or runways without outriggers.

A

Low

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4
Q

The entire rotating crane structure the lies above the swing circle is referred to as the ______of the crane.

A

Upperworks

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5
Q

When a luffing jib is raised or lowered independently of the boom, the crane’s____ is used as the jib hoist.

A

Auxiliary winch

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6
Q

Carrier mounted telescopic boom cranes are subdivided by the type of____section with which they are equipped

A

Head

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7
Q

The center of gravity is the point in the object around which it’s weight is______.

A

Evenly distributed

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8
Q

A mobile crane is stable when it’s leverage on the load is______the load’s leverage on the crane.

A

Greater than

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9
Q

The leverage the crane exerts on the load changes as it_______.

A

Swings

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10
Q

Unless otherwise indicated, if the actual boom length falls between the values listed in the load chart, use the gross capacity for the next_______

A

Longer boom length listed in the chart

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11
Q

On a loaded lattice boom crane, the boom angle is the angle between the____line of the boom and the horizontal

A

Center

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12
Q

If the actual boom angle falls between the values listed in the load chart, use the gross capacity rating for the next_____

A

Lower boom angle listed in the chart

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13
Q

Mobile crane main boom load charts indicate where strength factors apply and where stability factors apply by dividing the chart with a heavy solid line or by using_____.

A

Shaded areas

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14
Q

Asymmetrical reeling of the boom tip will cause___in the boom.

A

Torsion

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15
Q

When a crane is set up off-level, swinging from the high side to the low side increases the_____.

A

Operating status

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16
Q

When working on rubber, an operator can overcome outswing by____.

A

Booming up as the load is lifted

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17
Q

Boom strength is most affected when the wind is from the_____.

A

Side

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18
Q

Which of the following is NOT one of the key roles that must be known at every crane and Derrick worksite?

A

Job Stewart

19
Q

The target levels provided on most machines can be used for the initial leveling, but do not rely on them for precision or final leveling. Which of the following methods should be used instead?

A

Hoist line or 3’ or 4’ level

20
Q

Which is the following is a condition for a crane on outriggers properly set for lifting?

A

The hook is directly above the load’s center of gravity

21
Q

Joining lengths of wire rope by splicing is______.

A

Prohibited

22
Q

Where a wire rope is required to be removed from service, either the equipment (as a whole) or the hoist with that wire rope must be_____, until the wire rope is repaired or replaced.

A

Tagged-out

23
Q

Inspect non-rotating (rotation-resistant, non-spin, spin-resistant) wire ropes very carefully because they tend to wear_____.

A

From the inside out

24
Q

Which of the following is NOT a potential hazard when assembling and disassembling lattice booms?

A

Crew members understanding their tasks

25
Q

Lifting from jibs or boom extensions while____is prohibited by most manufacturers.

A

On rubber

26
Q

When disassembling booms and jibs, none of the pins in the pendant are to be removed (partly or completely) when the pendants are in_____.

A

Tension

27
Q

The_____must provide an adequately prepared working area for the crane.

A

Controlling entity

28
Q

During the erection of a tower crane, it may be necessary________or support the tower depending on its free-standing height.

A

Guy

29
Q

When erecting the main jib, place the main jib on timber blocking and place the slings so that the assembly can be hoisted level. Hoist the main jib level with the____and connect it using the proper pins.

A

Turntable

30
Q

All tower crane nuts and bolts must be well lubricated, of the correct size and grade, and tightened sufficiently to develop a_______greater than the dynamic loads that will be applied to them

A

Pre-tension

31
Q

An ironworker is a part of a crew erecting a tower crane and finds a loose nut on a bolt that had been previously tight. What should the ironworker do?

A

Install a new nut and bolt

32
Q

When climbing a tower crane, immediately prior to the climbing operation, the wedges or clamps must be_____to allow for free upward movement of the tower

A

Released

33
Q

When dismantling a tower crane, never release any of the tower crane’s_____, bolts, pendants,etc., until the section or component is properly slung and balanced and the total weight is being carried by the other crane or the Derrick.

A

Pins

34
Q

Before making a lift with a tower crane, ensure that the load has been properly____and well secured to prevent the movement or dislodgment of any part.

A

Rigged

35
Q

Extreme caution should be exercised when traveling with over 50 percent capacity loads as track irregularities will subject to______loads, which must be compensated for by reducing the hook load.

A

Shock

36
Q

If the operator becomes aware of a safety problem and needs to communicate with the signal person, the operator must safely stop operations. Operations must not resume until the operator and signal person agree that the problem has been_____.

A

Resolved

37
Q

The signal person must have a basic understanding of the equipment operation and limitations, including the crane dynamics involved in swinging and stopping loads and boom deflection from____loads.

A

Hoisting

38
Q

Which of the following is NOT a type of Derrick that ironworkers would not work with?

A

Gantry

39
Q

For guy derricks, the minimum number of guys must be_____with equal spacing.

A

6

40
Q

The mast base must permit the mast to rotate freely when necessary and permit____of the mast without binding.

A

Deflection

41
Q

Prior to initial use, new or reinstalled derricks must be tested with no hook load by a competent person to verify proper operation. Complete this statement describing one item that the test must include: lifting and lowering the hook(s) through the full range of____travel

A

Hook

42
Q

Derrick tests conducted must be documented and must contain the date, test results, and the name of the_____.

A

Tester

43
Q

When using floating cranes, the employer must erect and maintain control lines, warning lines, railings or similar barriers to mark the boundaries of the_____areas.

A

Hazard

44
Q

Gantry cranes, bridge cranes, and overhead cranes, are all types of cranes which lift objects by a hoist which is fitted in a hoist trolley and can move_____on a rail or pair of rails fitted under a beam

A

Horizontally

Cranes (1 decks)

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