Certified Pipefitter Practice Test
Pipefitter Rigging and Hoisting Operations 2
What is the 'D/d ratio' in rigging, and what does a higher ratio indicate?
Select your answer
A
The ratio of wire rope drum or sheave diameter to rope diameter; a higher ratio means less wire fatigue and longer rope life
B
The ratio of dead load to dynamic load on a rigging system
C
The ratio of downward force to diagonal force in a sling angle calculation
D
The ratio of drum diameter to hook diameter on a hoist
Hint
