Question 2128Deck General70% to pass
You are ordering a new block to use with a 3-inch circumference manila line. Which represents a proper size block for this line?
AI Explanation
The correct answer is B) 9-inch cheek, 6-inch sheave.
The size of the block should be selected based on the circumference of the line, with the sheave diameter being approximately 2 times the line's circumference. For a 3-inch circumference manila line, a 6-inch sheave would be the appropriate size. The cheek size of the block should be larger than the sheave diameter to provide adequate strength and support, so a 9-inch cheek size is the proper choice.
The other options are incorrect because:
A) An 8-inch cheek size would be too small to properly support a 6-inch sheave.
C) A 6-inch cheek size would be too small for the 4-inch sheave.
D) A 12-inch sheave would be oversized for a 3-inch circumference line.
Related Questions
#2126 Separating both blocks of a tackle to prepare it for reuse is called _______________.#2127 To facilitate passing the end of a large rope through a block, you could use a _______________.#2129 What size block shell should be used with a 4-inch manila line? #2130 The cheek length of a block in inches should be about _______________.#2131 Which tackle arrangement has the LEAST mechanical advantage?