Millwright - Rigging and Hoisting Exam Questions and
Answers with Complete Solutions 100% Correct 2024.
1. Of a block and tackle with five rope falls and minimum friction, how much force is needed to retain
250lbs?
a. 50 lbs
b. 100 lbs
c. 250 lbs
d. 75 lbs
a. 50 lbs
250lbs/5 = 50 lbs
2. What diameter rope is needed to support two tons using a vertical lift?
a. ½"
b. ¾"
c. 1"
d. ¼"
a. ½"
3. What is the standard safety factor to consider for a platform supporting people?
a. 1 : 1
b. 5 : 1
c. 10 : 1
d. 15 : 1
c. 10 : 1
4. If a wire rope has a breaking strength of 15,000 lbs, determine the safe working load under normal
lifting conditions.
a. 2,000 lbs
b. 3,000 lbs
c. 5,000 lbs
d. 15,000 lbs
b. 3,000 lbs
5:1 safety factor
15000lbs / 5 = 3000lbs
, 5. Given a rope strength of 12,650 lbs, and splicing the rope reduces strength by 25%, determine the
new
rope strength for normal rigging conditions.
a. 1897.5 lbs
b. 948.75 lbs
c. 1000 lbs
d. 2300 lbs
a. 1897.5 lbs
[12650 lbs/5(safety factor)] x 0.75
=1897.5 lbs
6. What type of lifting technique has the least lifting capacity (if all use the same rope)?
a. Basket hitch
b. 2 part Bridle
c. Vertical hitch
d. Choker sling
d. Choker sling
7. What type of sling presentation will accept 200% of the SWL?
a. Choker
b. Basket
c. Bridle
d. Vertical
b. Basket
8. The signal for stop in rigging is:
a. Point finger
b. Flat of hand waved across chest
c. Wave hands in the air
d. Finger pointed downward into palm of hand
b. Flat of hand waved across chest
9. The construction of wire rope is determined by the direction of the twist of strands. This is known
as:
a. Lay
b. Form
c. Stranding
d. Mesh
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