51. A single stage axial flow halex installed in the suction type fan impeller to lower the NPSHR . . . . . . . .
52. Which of the indigenous firm do manufacture SDL & LHD in India.
53. The measuring unit of head is . . . . . . . .
54. In connection with lowering or raising of persons by means of bucket etc for a shaft exceeding 'A' m depth, there shall be significant cover overhead for protection from things falling down the shaft A is given by . . . . . . . .
55. The iron percentage in wire ropes . . . . . . . .
56. The wires sprial round the core in the same direction as the threads of a left hand screw are called . . . . . . . .
57. The rate of loading of gathering arm loader depend upon the number of . . . . . . . .
58. Sandwich conveyor is a type of . . . . . . . .
59. The example for non stranded rope is . . . . . . . .
60. Lining segments of surge wheel made of . . . . . . . .
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