Building Materials Civil Engineering MCQ Questions Answers
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1) In medium-strength concrete the water-cement ratio should not be less than
a) 0.25
b) 0.35
c) 0.4
d) 0.45
2) The percentage of gypsum added to the clinker during manufacturing process is
a) 0.2
b) 0.25 to 0.35
c) 2.5 to 3.5
d) 5 to 10
3) A sample of cement is said to be sound when it does not contain free
a) lime
b) silica
c) iron oxide
d) alumina
4) As per IS specifications, the maximum final setting time for ordinary Portland cement should be
a) 30 minutes
b) 1 hour
c) 6 hour
d) 10 hour
5) Turpentine is a natural material obtained from
(a) oak trees
(b) pine trees
(c) mines
(d) any of the above
6) Lime mortar is generally made with
a) quick lime
b) fat lime
c) hydraulic lime
d) white lime
7) Commonly used base for paint is
(a) iron oxide
(b) red lead
(c) titanium white
(d) any one of the above
8) Loss on ignition in Portland cement shall not be more than
a) 4%
b) 5%
c) 3%
d) 6%
9) Segregation is due to
(a) lack of sufficient quantity of fine aggregates
(b) dropping concrete from a greater height
(c) over vibration
(d) all the above
10) Low heat cement contains lower percentage of which of the following
a) C3A
b) C3S
c) C2S
d) None of these