Study Questions

Question 1

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

Answer 1

Distribute the force over larger area

Question 2

What is the best location for leveling a crane?

Answer 2

Upperworks

Question 3

Safety factor of running rope is _____.

Answer 3

3.5 to 1

Question 4

Safety factor of standing rope is ____.

Answer 4

3 to 1

Question 5

Safety factor of rotation resistant rope is ____.

Answer 5

5 to 1

Question 6

Safety factor for personnel platforms (other than rotation resistant) is ____.

Answer 6

7 to 1

Question 7

Safety factor for personnel platforms (rotation resistant rope) is ____.

Answer 7

10 to 1

Question 8

Sling safety factor is ___.

Answer 8

5 to 1 (chain 4-1)

Question 9

Strongest to weakest hitches are ____.

Answer 9

Basket, Vertical/Straight line, Choker

Question 10

Types of hitches are ____.

Answer 10

Basket, Choker, Double Basket, Double Choker

Question 11

Lower sling angle equals ____.

Answer 11

Greater tension (preferred angle is 60 degrees)

Question 12

Minimum sling angle is ____.

Answer 12

30 degrees

Question 13

Lifting beam must be marked with _____.

Answer 13

Manufacturer name, serial number, weight & permitted working load.

Question 14

Parts of line are ____.

Answer 14

Individual lines supporting the load block

Question 15

Odd parts end ____.

Answer 15

At the hook

Question 16

Even parts end ____.

Answer 16

At the boom tip

Question 17

Minimum wraps on the drum.

Answer 17

2 (3 for fixed cab)

Question 18

More lays on the drum means _____.

Answer 18

Line pull decreases

Question 19

Eccentric reeving causes _____.

Answer 19

Side loading on the boom

Question 20

Synthetic slings must be used when ____.

Answer 20

Handling boom sections

Question 21

Hooks must be replaced if _____.

Answer 21

Any twist exists, 5% of original opening, or 10% wear throughout the base or throat of hook and eye

Question 22

After rigging the main hoist line and boom assembly, _____.

Answer 22

Install the book angle indicator

Question 23

How many randomly broken wires in a lay length must there be on a mobile crane’s hoist line before it should be removed from service?

Answer 23

6

Question 24

On a mobile crane, how many broken wires are permitted at the end connection of a pendant line before it must be taken out of service?

Answer 24

1

Question 25

How often is the competent person required to inspect the running wire ropes on a mobile crane?

Answer 25

Each shift

Question 26

For personnel platforms, rigging must support ____ maximum intended load.

Answer 26

5 times

Question 27

For personnel platforms, wire rope safety factor is _____. Rotation resistant wire ropes is ____.

Answer 27

5 to 1; 10 to 1

Question 28

For personnel platforms, rated capacity of the crane is reduced by ____.

Answer 28

50 percent

Question 29

Three components of wire rope are ____.

Answer 29

wires, strands, and core

Question 30

D/d ratio for live line is ___.

Answer 30

18:1

Question 31

D/d ratio for load block is ____.

Answer 31

16:1

Question 32

D/d for boom hoist is ____.

Answer 32

15:1