Millwright - Rigging and Hoisting
Questions and Answers 100% Correct.
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 - ANSWER-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" - ANSWER-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 - ANSWER-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 - ANSWER-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 - ANSWER-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 - ANSWER-d. Choker sling
7. What type of sling presentation will accept 200% of the SWL?
a. Choker
b. Basket
c. Bridle
d. Vertical - ANSWER-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 - ANSWER-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 - ANSWER-a. Lay
10. A flexible wire rope for overhead crane use is:
a. 6-19
b. 6-37
Questions and Answers 100% Correct.
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 - ANSWER-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" - ANSWER-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 - ANSWER-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 - ANSWER-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 - ANSWER-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 - ANSWER-d. Choker sling
7. What type of sling presentation will accept 200% of the SWL?
a. Choker
b. Basket
c. Bridle
d. Vertical - ANSWER-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 - ANSWER-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 - ANSWER-a. Lay
10. A flexible wire rope for overhead crane use is:
a. 6-19
b. 6-37
