Question 2095 Deck General

The correct answer is C) 20. The mechanical advantage of a tackle system is equal to the number of parts of the hauling line supporting the load. In this case, the tackle number 4 has 4 parts of the hauling line supporting the load, and the tackle number 10 (which the hauling part of tackle 4 is connected to) adds another 5 parts of the hauling line. Therefore, the total mechanical advantage of this rig is 4 + 5 = 20. The other options are incorrect because they do not accurately reflect the number of parts of the hauling line supporting the load in this specific rig configuration.