Question

_________ are used to change the direction of ropes and to raise greater loads with less efforts.

(a) Pulley blocks

(b) Elevators

(c) Escalators

(d) Conveyors

Answer 1

Correct answer is (a) Pulley blocks

To elaborate: The blocks are made of wood and depending on the number of sheaves or Pulley wheels, they are termed as single or double etc. pulley blocks. The various forms of pulley blocks are available such as differential pulley blocks, spur gear pulley blocks and worm gear pulley block.