ors who leave the special operations post.\rshall re-evaluate the operation and shal1 be able to work on\rthe job after verification.\rYour answer: no answer: 6 months\r18. In hoisting operations, heavy objects that are buried or\rcongealed on the ground shall be prohibited and hoisted.\rYour answer: no answer: slant, slant\r19. There are many methods of unanchored lifting techniques,\rand their common point is that the motion of the device can be\rused to achieve the purpose of the hoisting work.\rYour answer: no correct answer: self-balance\r20. Artificial lowering of the water table should continue\runtil after backfilling.\rYour answer: no answer is correct: the basic project is\rcompleted
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