Crane Class 1

Question 1

Duty cycle

Answer 1

Relative operating in a short cycle

Question 2

Running wire rope

Answer 2

Wire rope running over a sheave

Question 3

Periodic inspection

Answer 3

With records kept for at least 3 months

Question 4

Lay length

Answer 4

Horizontal distance of one rotation of a strand on the wire rope

Question 5

Rope lay

Answer 5

Signifies the rotation of wire and strands

Question 6

Safety factor of regular lay wire rope while hoisting personnel

Answer 6

7 to 1

Question 7

The dead end of a wire rope should never be less than?

Answer 7

6 inches

Question 8

When using rotation resistant wire rope on a becket the tail should never be less than

Answer 8

20 diameters of the wire rope

Question 9

What are the 5 parts that make up a wire rope?

Answer 9

Wire
Center wire
Strand
Wire rope core
Wire rope

Question 10

Which is the number of strands and which is the number of wires per strand?

6x19

Answer 10

6 strands 19 wires per strand

Question 11

Regular lay

Answer 11

Wires and strands that fall in opposite directions

Question 12

Lang lay

Answer 12

Wires and strands that fall in the same direction

Question 13

Rigging wire rope removal criteria

Answer 13

10% broken wires in 8 rope diameters

Question 14

How do you measure wire rope and how many times?

Answer 14

Crown to crown

3 times for 6 strand wire rope
4 times for 8 strand wire rope

Question 15

What is the termination efficiency of a wire rope clip turn back eye?

Answer 15

90% 1” and over
80% under 1”

Question 16

Nylon choker his has ___ capacity of a single leg sling

Answer 16

75% the capacity

Question 17

Double choker hitch has ____ capacity of a bridle at the same sling angle

Answer 17

75% capacity

Question 18

What is the D/d ratio of a basket hitch?

Answer 18

25/1

Question 19

What is the safety factor of IWRC (Independent Wire Rope Core)

Answer 19

7/1 for rotation resistant

10/1 for personnel lifting

Question 20

What is the design factor for wire rope and synthetic slings?

Answer 20

5/1

Question 21

What is the design factor for chain slings?

Answer 21

4/1

Question 22

What is the formula for determining safe working load SWL of a wire rope sling?

Answer 22

Diameter of the sling multiplied by itself then multiplied by 8 or:

d x d x 8 = SWL

Question 23

How do you determine if the ultimate breaking strength UBS of wire core, wire rope?

Answer 23

Diameter of the wire rope multiplied by itself, multiplied by 45 or:

d x d x 45 = UBS

Question 24

What is the safety factor of rotation resistant wire rope?

Answer 24

5/1

Question 25

Wire core wire rope is ___% stronger than fiber core wire rope

Answer 25

7.5%

Question 26

What are the 3 types of shackles?

Answer 26

Safety pin Bolt type Screw type

Question 27

What does D/d stand for?

Answer 27

Diameter to diameter ratio Big D = diameter of the object the wire rope sling goes around Little d = diameter of the wire rope sling

Question 28

Sorting hooks (pelican hooks) should be used at what angle and up to what WLL?

Answer 28

45 degree angle and a 7.5t WLL 2t WLL when tip loading

Question 29

3 wire rope lubricant criteria

Answer 29

Non corrosive Recommended by manufacturer Cannot hinder inspection

Question 30

Termination efficiency of a Flemish eye?

Answer 30

90%

Question 31

Termination efficiency of a wedge socket

Answer 31

80%

Question 32

Termination efficiency of a spelter socket

Answer 32

100%

Question 33

Reasons for wire rope removal

Answer 33

Electrical contact Crushing Birdcaging Core protrusion and wear

Question 34

Turnback eye formula for number of clips needed

Answer 34

3 times the diameter of the wire rope plus one 1” wire rope: 4 clips 1 x 3 + 1 = 4 clips

Question 35

Removal criteria of wire rope sling

Answer 35

5 broken wire in one strand in one lay or 10 broken wires in one lay

Question 36

Maximum included angle of a hook

Answer 36

90 degrees

Question 37

Maximum included angle of a shackle

Answer 37

120 degrees

Question 38

Wear criteria of a hook

Answer 38

5% critical areas 5% or 1/4” throat opening 10% other areas

Question 39

What is fleet angle

Answer 39

The angle between a line drawn from the tip of the boom to the ground and a line drawn from the boom tip to the outermost flange point

Question 40

Removal criteria of wire rope

Answer 40

1/3 of the original dimension

Question 41

Rejection criteria for chain slings

Answer 41

10% wear 5% stretch Weld splatter Twists Gouges Excessive nicks Kinks

Question 42

Wire rope sling capacities

Answer 42

Two legs 200% Single leg 100% Single choke 75%