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1-5 Ton Crane > 1-5 Ton crane > Flashcards

1-5 Ton crane Flashcards

1
Q

Telescopic boom cranes manufactured after February 28, 1992 must be equipped with a device which prevents damage from contact between the traveling block/ball and the boom tip this device is called what?

A

Anti 2 blocking device

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2
Q

According to OSHA accessible areas of an operating crane must always be barricaded within?

A

The swing radius of the rear of the rotating substructure

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3
Q

When working near powerlines when is a single person required?

A

When the crane is within a booms length of the prohibited zone

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4
Q

A pre-lift meeting is an operational requirement for a suspended personal platform true or false?

A

True

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5
Q

What prohibits the boom from falling down on a hydraulic crane in the event of a hydraulic line rupture?

A

Load holding valve 

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6
Q

Only use what? grade chain for overhead lifting.

A

Alloy grade 8/80 or 10/100

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7
Q

To determine the necessary parts of line and operator would need to divide the suspended load by either the SWL/safe working load for the PLP/permissible line pull true or false?

A

True

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8
Q

SWL/safe working load of a cranes wire rope is 4000 pounds what is the safe working load of four parts of line?

A

16,000

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9
Q

When working on outriggers the only time they should be less than fully extended is when?

A

When there is a load chart for this configuration

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10
Q

An A/D director is?

A

A competent/qualified person,

The sole person incharge of Assembly and disassembly of the crane,

The sole person responsible for overseeing operations regarding erecting and dismantling of tower cranes 

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11
Q

The capacity of a choker hitch is what? percent of a vertical swing hitch.

A

70-80%

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12
Q

What is the removal criteria for IWRC running wire rope?

A

6 randomly distributed broken wires and one lay or 3 broken wires in one strand in one lay

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13
Q

Significant distortion of the wire rope structure such as, kinking, crushing, birdcages, understranding, core failure, or core protrusion are what?

A

Category 1 apparent deficiancies

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14
Q

How does the operator verify the LMI’s Bloom length or load radius reading?

A

Actual measurement

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15
Q

What does LM I stand for?

A

Load moment indicator

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16
Q

A four legged steel bridal sling has how much capacity increase of a 3 legged steel bridal sling ?

A

No increase

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17
Q

When the number of wraps on the drum increase, what happens?

A

Permissible line pull may decrease

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18
Q

What is the ANSI wear criteria standard for taking wire rope out of service

A

Metal loss of 1/3 of the diameter of the outside

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19
Q

When an operator arrives on a job site and the crane is already erected how would he test the auxiliary and main hoist brakes

A

Lift the load slightly off the ground, apply the brakes, see if they hold

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20
Q

Blocking under outrigger stabilizers must be sufficient to what?

A

Sustain the entire weight of the crane and it’s Maximum Load 

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21
Q

The term upperworks refers to what part of the crane

A

Above the turntable

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22
Q

The removal criteria for rotation resistant wire rope is what?

A

2 randomly distributed broken wires in 6 rope diameters or 4 randomly distributed broken wires in 30 rope diameters

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23
Q

When using cranes of different capacities in a two crane pick, the crane with the larger net capacity should what?

A

Should be hooked at a distance closer to the loads center of gravity

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24
Q

A positive acting anti-two block device is an operational requirement for suspended personnel platform’s true or false?

A

True

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25
Q

Electrocution warning signs should be posted where?

A

In the cab in view of the operator, and at least two on the outside of the equipment

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26
Q

The table a minimum clearance distance during operation of a crane in vicinity of a 200Kv powerline is what?

A

15ft

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27
Q

The removal criteria for a sling replacement is what?

A

10 randomly distributed wires in one rope lay or five broken wires in one strand in one rope lay

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28
Q

On duty cycle operations such as swinging concrete, steel erection, and magnet work, most crane manufacturers require a crane load chart capacity to be what?

A

To be reduced by 20%

29
Q

The proper way to calibrate a boom angle indicator is what?

A

Have the machine on level ground, using a level, place the boom in a horizontal position and set the indicator to 0°

30
Q

A signal person must have an understanding of what?

A

Equipment operations

Crane dynamics involved in swinging and stopping loads

Boom deflection

31
Q

When the boom handle is released to its center position, which action should be expected?

A

The boom hoist will be held stationary

32
Q

The WLL/working load limit at the bottom of a sorting hook is 7 1/2 tons when fully engaged, and the sling angle is less than 45°. If tip loading occurs due to a sling angle greater than 45° the WLL/weight load limit will be what?

A

2 tons

33
Q

When performing a multiple crane lift, It is important for the operator to understand what?

A

The weight may increase if one crane lands the load

34
Q

A trual lift of what % of the platform capacity is an operational requirment for suspended personal platforms.

A

125%

35
Q

What is encroachment?

A

When any part of the load, load line, or rigging reaches the minimum clearance distance of powerlines.

36
Q

The correct procedure to follow if the operator of a crane comes in contact with an energized power is to what?

A

Remain inside the cab unless there is danger of fire, explosion, or other emergency that would force you to leave the cab

37
Q

What is the maximum included angle for a shackle?

A

120°

38
Q

Most crane manufacturers reduce load capacity for duty cycle operations because?

A

Side loading forces may occur

39
Q

What is the maximum included angle for hooks?

A

90°

40
Q

In a range diagram boom length and bloom angle can be used to determine what?

A

Load radius

41
Q

A Crane’s ground pressure can approach a weight that is?

A

100% of the weight of the crane and it’s suspended load

42
Q

What is ASME B30.10’s rejection criteria for hoist hooks

A

Any distortion causing an increase of throat opening of 5%, not to exceed a 1/4”

43
Q

Where is the best location for leveling a crane

A

Upperworks

44
Q

What is the D/d ratio

A

The diameter of the wire rope(d), compared to what it goes around(D)

45
Q

What is the purpose of placing mats or cribbing under the outrigger floats?

A

To distribute the downward force of the float over a larger area

46
Q

What is the best procedure to follow when underground utilities may be present?

A

Contact the local utility company

47
Q

What is the proper procedure when using an insulating link for boot near powerlines

A

Be sure to maintain the correct allowable distance from the lines

48
Q

You should always have at least how many wraps on a hoist drum according to ANSI and OSHA?

A

2

49
Q

What is cabling?

A

When the traveling block has turned 90° from its neutral position, entangling the hoist lines

50
Q

What is not a good location for crane set up?

A

Above utilitys

51
Q

0-50Kv

A

10ft

52
Q

Over 50-200Kv

A

15ft

53
Q

Over 200-350Kv

A

20ft

54
Q

Over 350-500 Kv

A

25ft

55
Q

Over 500-750Kv

A

35ft

56
Q

Over 750-1000Kv

A

45ft

57
Q

Over 1000Kv

A

Consult utility owner

58
Q

What is net capacity?

A

Gross capacity minus deductions

59
Q

What does IWRC stand for?

A

Independent Wire Rope Core

60
Q

What does PS stand for?

A

Plow Steel

61
Q

Out riggers must be fully extended unless?

A

There is a load chart for the situation

62
Q

Blocking under outrigger floats should be made with what?

A

Douglas Fir or construction grade equivalent

63
Q

The Crane should have a minimum clearance of what? 360° around it’s swinging radius

A

2ft

64
Q

90 degree sling angle

A

1.0 Load angle factor

65
Q

60 degree sling angle

A

1.155 load angle factor

66
Q

50 degree sling angle

A

1.305 load angle factor

67
Q

45 degree sling angle

A

1.414 load angle factor

68
Q

30 degree sling angle

A

2.0 load angle factor

1-5 Ton Crane (1 decks)

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