Question 1705 Deck General

The correct answer is C) 4. When a twofold purchase is rove to disadvantage, the mechanical advantage is 4. This is because in a twofold purchase, there are two parts of the rope supporting the load, and when roved to disadvantage, the mechanical advantage is equal to the number of parts of the rope supporting the load, which is 4. The other options are incorrect because: A) 2 is the mechanical advantage of a single-fold purchase, B) 3 is the mechanical advantage of a threefold purchase, and D) 5 is the mechanical advantage of a fourfold purchase.