61. Rotary drilling is the fastest method in case of
62. The method of moving each brick through a small horizontal distance before it is finally laid in any brick wall and pressing it by means of brick hammer, is known as
63. The function of cleats in a roof truss is
64. The under surface of an arch, is called
65. The minimum depth of foundation in clayey soils is
66. The range of spread from the wall base to outer edge of a brick work foundation does not exceed
67. The single stage well point system of dewatering an excavation can be used if the depth of excavation does not exceed
68. For a wall carrying heavy load on low bearing capacity soil,
69. The process of working a flat for the finishing coat, is known
70. In flat roof of reinforced cement concrete, the recommended angle of slope, is
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