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Crane Class > License practice test Part 2 > Flashcards

License practice test Part 2 Flashcards

1
Q

What is gross capacity?

A

The number found in the load chart, never to be exceeded

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2
Q

What is the broken wire removal criteria for wire rope slings?

A

5 broken wires in 1 strand in one lay or 10 random broken wires in 1 lay

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3
Q

What is the load that is applied to test rigging gear?

A

125% for 5 minutes

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4
Q

What is effective weight?

A

Is the weight of an object in comparison to its placement on the crane

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5
Q

Describe daily inspection

A

Before each shift
Appointed person
No records needed

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6
Q

Describe periodic inspection

A

1-12 month intervals
Records kept
Qualified person

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7
Q

What is the unit weight of steel

A

490lbs/cu ft

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8
Q

Define boom angle

A

If you drew a line from the center of the boom then to the horizontal

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9
Q

Included angle of a hook

A

90 degrees

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10
Q

The operator shall test the brakes each time a load is approaching the rated load or is handled,
by

A

Slightly lift the load off the ground apply the brakes and see if they hold

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11
Q

The horizontal lines represent what on the Range diagram?

A

Elevation and boom tip height

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12
Q

What is jib angle to ground?

A

Main boom angle minus jib offset

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13
Q

Above the bold line and a load chart represents what?

A

Structural competence

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14
Q

The unit weight of water is what?

A

62 pounds per cubic foot

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15
Q

Load chart capacities for
Outrigger
Rubber
Crawler

A

Outrigger 85%
Rubber 75%
Crawler 75%

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16
Q

What is the maximum load that can be applied to working gear in service

A

WLL or SWL

17
Q

What is the wear criteria for hooks?

A

5% in critical areas 10% in other areas
5% but no more than a 1/4” in the throat opening

18
Q

What is the best way to reeve a block and why

A

Even parts reeved symmetrically to avoid torsion of boom tip

Even to boom odd to block

19
Q

What is ductility

A

The point of material can be stretched or flexed without failure

20
Q

What is a range diagram?

A

A 2D picture showing crane configuration, radius, Boom tip height and boom angle

21
Q

How much more capacity does a four legged chain have compared to a three legged chain?

A

0 capacity only adds stability

22
Q

How many gallons per cubic foot

A

7.48 gallons per cubic foot

23
Q

Double leg basket must not be used at an angle less than?

A

60 degrees

24
Q

3 degrees off level can lose as much as

A

50% capacity

25
Q

What is the formula for the volume of a cube?

A

LxHxW

26
Q

What is the formula for the volume of a cylinder?

A

3.14 x R2 x length
3.14 x (d x d DIVIDED by 4) x length

27
Q

Wire rope core is % stronger than fiber core

A

7.5%

28
Q

3 types of shakles

A

Safety pin
Screw pin
Bolt type

29
Q

Name a type of wire rope that has a tendency to untwist

A

Lang lay because all the wires go in the same direction

30
Q

Testing a crane after repairs shall not exceed % of manufacturers load rating

A

110%

31
Q

What angle should sorting hooks be used? What happens to the 7 1/2 ton WLL when tip loaded

A

45 degrees
2 Ton WLL if tip loaded

32
Q

What is D/d ratio

A

Diameter of the object/load (D) compared to the diameter of the wire rope (d)

33
Q

Duty cycle has a % reduction of capacity

A

20%

34
Q

Rigging gear fails at

A

UBS ultimate breaking strength

35
Q

What is the minimum number of wraps on a hoist drum?

A

2

36
Q

What do the vertical lines on a range diagram indicate?

A

Radius

37
Q

What is the definition of lay in reference to wire rope

A

The way the wires fall in the wire rope

38
Q

What would you lubricate wire rope with?

A

Non corrosive
Cannot hinder inspection
Recommended by manufacturer

39
Q

WSC

A

Wire Strand Core

Crane Class (18 decks)

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