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Nhbrc Questions 116 to 120

HomeNhbrc Questions 116 to 120

NHBRC QUESTIONS 116 - 120

116)What is the concrete mix properties for use with a 19 mm stone for 25 MPa?
a)2 Bags cement, 3 Wheelbarrow of sand, 3 Wheelbarrows of stone, 55 L water
b)1 bag cement, 1 1/2 wheelbarrow of sand, 1 1/2 Wheelbarrow of stone, 25 L water
c)2 bags of cement, 2 wheelbarrow of sand, 2 wheelbarrow of stone, 20L water
d)None of the options are correct

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117)Concrete curing methods include?
a)Plastic sheeting
b)Water curing
c)None of the above
d)All of the above

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118)How can concrete be protected from losing moisture?
a)Damp sand, cover it with plastic and spray the surface with water
b)Damp sand, cover it with a cloth and spray the surface with water
c)All of the above
d)None of the above

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119)Why is concrete compacted?
a)To eliminate bubble and void as well as to sustain a level surface
b)To make it harder
c)To soften it for mixing
d)All of the above

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120)What quality of water is used for concrete mixing?
a)Drinking (potable) water
b)Gray water
c)Blackish water
d)River water

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