Question 2121Deck General70% to pass
To reeve a right-angle threefold purchase start with the _______________.
AI Explanation
The correct answer is C) middle sheave top block.
To reeve a right-angle threefold purchase, you start by reeving the fall through the middle sheave of the top block. This configuration allows the purchase to create a mechanical advantage of 3, making it easier to lift or move heavy loads. The other options are incorrect because the left or right sheaves of the bottom block, or the left sheave of the top block, would not create the proper right-angle threefold purchase configuration.
Related Questions
#2119 The sheave diameter to be used with a 3-inch manila rope is _______________.#2120 A breeches buoy is being rigged from the shore to a stranded vessel. The initial shot line passed to the vessel is normally made fast to a _______________.#2122 How much force would be required to lift a weight of 200 lbs. using a gun tackle rigged to disadvantage (do not consider friction)? #2123 Unless extremely flexible wire rope is used, the sheave diameter should always be as large as possible, but should never be less than _______________.#2124 How much weight can you lift by applying 100 lbs. of force to a twofold purchase rigged to disadvantage (do not consider friction)?