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Cameron's Crane Class > Crane Test 6/29/2019 > Flashcards

Crane Test 6/29/2019 Flashcards

1
Q

What are the two types of Wire Rope?

A
  1. Rotation Resistant

2. Non Rotation Resistant

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2
Q

What is Rotation Resistant?

A

non-rotating rope or non-spin

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3
Q

What is the safety factor in Rotation Resistant?

A

5:1 (unless lifting personnel 10:1)

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4
Q

What is the safety factor in Non-Rotation Resistant?

A

3.5:1 (unless lifting personnel 7:1)

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5
Q

How many wires should be broken in the CORE before removal of a ROTATION RESISTANT cable?

A

1 broken wire in core

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6
Q

How many wires should be broken, and within how many diameters, before removal of a ROTATION RESISTANT cable?

A

2 broken wires in 6 diameters

4 broken wires in 30 diameters

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7
Q

How many wires should be broken in the CORE before removal of a NON-ROTATION RESISTANT cable?

A

1 broken wire in the core

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8
Q

How many wires should be broken in a strand of 1 lay before removal of a NON-ROTATION RESISTANT cable?

A

3 broken wires in 1 strand of 1 lay

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9
Q

How many RANDOMLY DISTRIBUTED wires should be broken in 1 lay before removal of a NON-ROTATION RESISTANT cable?

A

6 randomly distributed broken wires in 1 lay

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10
Q

How many wires should be broken at the END CONNECTION before removal of a STANDING ROPE cable?

A

2 broken wires at the end connection

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11
Q

How many wires should be broken AWAY FROM the END CONNECTION before removal of a STANDING ROPE cable?

A

3 or more away from the end connections

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12
Q

What is eccentric reeving?

A
  • hoist line not evenly distributed across sheaves

- creates side loading on boom or the block to hang uneven

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13
Q

What is excessive reeving?

A
  • too many parts of line for the lift

- adds additional weight and the possibility to run out of rope

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14
Q

What is sufficient reeving?

A

-enough parts of line to make the lift?

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15
Q

What are the 3 Parts of Line?

A
  1. Eccentric Reeving
  2. Excessive Reeving
  3. Sufficient Reeving
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16
Q

What are some signs of unstable footing?

A
  • uncompacted soil
  • voids
  • tanks
  • plumbing
  • loose backfill
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17
Q

When is unstable footing most common?

A

Most common around new construction

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18
Q

WHEN and WITH WHOM should you verify ground conditions?

A

Verify ground conditions WITH site supervisor AT new construction

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19
Q

What should be used to verify existing underground utilities and piping?

A

Verify with special number in phone book (LA One Call, Dottie), or local utilities for existing underground utilities and piping

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20
Q

What is the minimum swing clearance?

A

tail swing/superstructure radius plus 2’

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21
Q

What is the minimum excavation? Recommended?

A

1: 1 minimum

1. 5:1 recommended

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22
Q

What should you do if outriggers cannot be fully extended?

A

use next lower chart

  • -if 50% chart is available, use it
  • -if not, the on rubber chart may apply
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23
Q

What must blocking be able to support?

A

Blocking must be able to support the weight of the load and the crane

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24
Q

Where should the MOST ground bearing pressure be?

A

Most ground bearing pressure over corners

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25
Q

Where should the LEAST ground bearing pressure be?

A

Least ground bearing pressure on crawlers- over side

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26
Q

Which surface (hard or soft) has more ground bearing pressure?

A

HARD SURFACES have more ground bearing pressure than soft surfaces

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27
Q

Where must outrigger floats be attached?

A

Outrigger floats must be attached to STABILIZERS

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28
Q

What is the most common cause of crane turnover?

A

Unstable Footing

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29
Q

Where is the luffing jib controlled?

A

controlled from the cab

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30
Q

How does the luffing job move?

A

moves independently of the boom

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31
Q

In spooling, how many wraps minimum are required on the drum when hoisted down?
OSHA SAID THIS!!!

A

2 wraps minimum remaining on drum when hoisted down

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32
Q

What percentage should a crane be de-rated by?

A

Crane must be de-rated by 50%

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33
Q

What is required over land?

A

Fall Protection

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34
Q

What is required over water?

A

Life Jacket

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35
Q

How often are inspections required?

A

Daily

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36
Q

What percentage should a proof test be?

A

125%

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37
Q

When can the proof test and trail lift be done?

A

Proof test and trail lift can be done at the same time (concurrently, simultaneously)

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38
Q

B30.23

A

Personnel Platforms

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39
Q

B30.5

A

Mobile and Locomotive Crane Standard

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40
Q

B30.9

A

Slings

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41
Q

1910.180

A

Cranes in General Industry (mostly overhead cranes)

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42
Q

1926.1400

A

Cranes in Construction

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43
Q

1926.1431

A

Suspended Personnel Baskets

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44
Q

1926.1402

A

Ground Condition

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45
Q

1926.1412

A

Inspections

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46
Q

1926.1413

A

Wire Rope Inspections

47
Q

1926.251

A

Rigging

48
Q

1926.1407-1926.1411

A

Power Lines

49
Q

What are the TWO most common causes of fatalities involving cranes?

A
  1. Use options or 20’ for under 350kv

2. Use options or 50’ for over 350kv

50
Q

If voltage is known: OPERATING

10’ = ? kv

A

0-50kv

51
Q

If voltage is known: OPERATING

15’ = ? kV

A

over 50-200 kV

52
Q

If voltage is known: OPERATING

20’ = ? kV

A

over 200-350 kV

53
Q

If voltage is known: OPERATING

25’ = ? kV

A

over 350-500 kV

54
Q

If voltage is known: OPERATING

35’ = ? kV

A

over 500-750 kV

55
Q

If voltage is known: OPERATING

45’ = ? kV

A

over 750-1000 kV

56
Q

What is the minimum clearance required for crane setup?

A

minimum 20’ clearance

57
Q

Transit:

4’ = ?

A

4’ = 0.75

58
Q

Transit:

6’ = ? kv

A

over 0.75-50kv

59
Q

Transit:

10’ - ? kv

A

over 50-345kv

60
Q

What is the most common cause of a crane turnover?

A

unstable footing

61
Q

What is the most common cause of crane operator fatalities?

A

crane turnover

62
Q

What is the most common cause of crane operator injuries?

A

getting in and out of the cab

63
Q

What is the most common cause of fatalities involving cranes?

A

electrocution

64
Q

What happens within 1%?

A

Crane must be leveled

65
Q

What happens at 20%?

A

Duty cycle reduction

66
Q

What happens at 50%?

A

Personnel Basket- Crane de-rating

67
Q

What is based on 75%?

A

Load charts based on 75% on rubber and crawlers (when not on outriggers)

68
Q

What happens at 75%?

A

Multiple crane lifts - Reduce capacities

69
Q

What is based on 85%?

A

Load charts based on 85% on outriggers

70
Q

What happens at 100%?

A

Cranes capacity on properly blocked outriggers

71
Q

What happens at 110%?

A

Load test to be performed no greater than 110% of capacity

72
Q

What happens at 125%?

A

Proof test of personnel baskets

73
Q

What is gross capacity?

A

total capacity of the crane as listed in load chart

74
Q

What are deductions?

A

lifting devices that must be deducted from the gross

75
Q

When should jib NOT be deducted?

A

Do NOT deduct jib if it is being used

76
Q

When should jib be deducted?

A

If erected and not used, it MUST be deducted

77
Q

What should be done if a jib is stowed?

A

If it is stowed, a stowed deduction must be made

78
Q

What is a jib deduction based on?

A

effective weight of jib- not actual

79
Q

What is net capacity?

A

gross capacity minus deductions

80
Q

What is gross load?

A

total of everything lifted by crane (load, ABH, excess cable, block, ball, jib, rigging, etc.)

81
Q

What is net load?

A

load only (pump, valve, pipe, etc. equipment being lifted)

82
Q

What is a range diagram used for?

A

used to scale work

83
Q

What is an area chart used for?

A

defines crane quadrants - front, side, back, 360 degrees, etc.

84
Q

What is a necessity for mobile cranes on barges?

A

Mobile cranes on barges MUST have a list chart from the manufacturer

85
Q

What is backward stability?

A

crane may turn over backward

86
Q

How should you measure radius?

A

measure from center of rotation to center of gravity of a freely suspended load

87
Q

When is the ONLY time side loading is allowed?

A

side loading only allowed with freely suspended load

88
Q

What cranes are least stable over the side?

A

mobile cranes

89
Q

When may truck cranes no have lifting capacities over the front?

A

if there is not a 5th outrigger

90
Q

What is pick and carry?

A

over front, short boom, low angle, and as close as possible

91
Q

Where is pick and carry with a truck crane?

A

over the rear

92
Q

Where are rough terrain cranes more stable?

A

over the front

93
Q

Where are truck cranes more stable?

A

over the rear

94
Q

What is the jib offset based on?

A

Jib offset based on job angle in relation to the boom

95
Q

What is the boom angle based on?

A

Boom angle based on boom angle in relation to horizontal

96
Q

What percentage is Hook Throat Wear?

A

10%

97
Q

What degree is a Hook Twist?

A

10 degrees

98
Q

What percentage is a Hook Mouth Opening/Throat Opening?

A

15%

99
Q

The ______ the sling angle, the _______ the tension exerted by the same weight.

A

The LOWER the sling angle, the GREATER the tension exerted by the same weight.

100
Q

What is the jib capacity based on?

A

Jib capacity is based on the structure of the jib

101
Q

What increases stability of a crawler?

A

Blocking under track tips

102
Q

What happens during boom deflection?

A

load swings out as boom bends with a heavy load

103
Q

above the line = ?

A

structure

104
Q

below the line = ?

A

stability/tipping

105
Q

When does wind affect a cranes capacity the most?

A

when it is from the side

106
Q

What is a possibility if a telescopic boom that is designed to extend equally gets out of sequence?

A

it is possible to damage the section that extends too far

107
Q

On a lattice boom crane with adjustable mast or gantry positions, when is the crane generally stronger?

A

when the mast or gantry is higher

108
Q

When using a friction crane with ‘power down’ capabilities, how should you lower a heavy load?

A

always use the power down function to lower heavy loads; DO NOT rely on brakes.

109
Q

When a mobile crane is placed on a barge, how is the list of vessel compensated for?

A

it must be secured and a “list” chart provided by the manufacturer must be used

110
Q

When are frequent inspections held and by whom are they performed by?

A
  • daily to monthly

- performed by COMPATENT person

111
Q

When are periodic inspections held and by whom are they performed by?

A
  • monthly to yearly

- performed by QUALIFIED person

112
Q

When can J-Hooks be used?

A

when lifting trusses

113
Q

What must jibs have to prevent them from rolling back?

A

positive stops

Cameron's Crane Class (2 decks)

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