Full access allows:
- Solve all tests online without limits;
- Remove all advertisements on website;
- Adding questions to favorite list;
- Save learning progress;
- Save results of practice exams;
- Watching all wrong answered questions.
- Homepage »
- Master (Near Coastal (Limited Tonnage: Less Than 100 GRT)) »
- Q165 - Navigation and Deck General/Safety
447. You are using tackle number 3 as shown in illustration D029DG below to lift a weight of 120 lbs. If you include 10 percent of the weight for each sheave for friction, what is the pull on the hauling part required to lift the weight?
The correct answer is 52 lbs. Tackle #3 has a 3:1 mechanical advantage. Accounting for 10% friction per sheave increases the effective load, resulting in a required pull of 52 lbs on the hauling part.
Comments (0)
There are no comments at the moment. If you found an error or think question is incorrect, tell everyone about it
Only signed in users can write comments
Signin