Question 2128 Deck General

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.