_______________ are used to change the direction of ropes and to raise greater loads with less efforts.(a) Pulley blocks(b) Elevators(c) Escalators(d) ConveyorsThis question was posed to me in my homework.This question is from Conveying Equipment topic in section Construction Equipments of Construction & Building Materials

_______________ are used to change the direction of ropes and to raise

1.	_______________ are used to change the direction of ropes and to raise greater loads with less efforts.(a) Pulley blocks(b) Elevators(c) Escalators(d) ConveyorsThis question was posed to me in my homework.This question is from Conveying Equipment topic in section Construction Equipments of Construction & Building Materials
Answer» 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.

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