Rigging Flashcards
1
Q
What is the mechanical advantage of a luff tackle?
A
3 to 1
2
Q
What is the mechanical advantage of a double luff tackle?
A
5 - 1
3
Q
What is the mechanical advantage of a two fold purchase?
A
4 to 1
4
Q
How do you determine the size block needed for a 3 inch line?
A
Needs a 10 inch block,
Size of line x 3
5
Q
How is size of a metal block figured out?
A
Size of wire rope x 20
And flexibility .
6
Q
Types of anchor shackles
A
Grade a, b, 1 , 2 and 3
A is regular strength B is high strength 1 is screw pin 2 is round pin 3 is safety bolt and nut
7
Q
Types of chain shackles
A
Types a, b ,1 ,2 and 3
A is regular strength B is high strength 1 is round pin 2 is screw pin 3 is safety bolt and nut.
8
Q
What is the mechanical advantage of a gun tackle?
A
2 to 1
9
Q
Mechanical advantage of a Three fold purchase
A
6-1
