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Quiz 17
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Q.1
The initial setting time for ordinary Portland cement as per IS specifications should not be less than
10 minutes
30 minutes
60 minutes
600 minutes
Q.2
According to IS specifications, the compressive strength of ordinary Portland cement after three days should not be less than
7 MPa
11.5 MPa
16 MPa
21 MPa
Q.3
A pug mill is used for
Softening brick earth
Moulding brick earth
Tempering brick earth
Providing brick earth
Q.4
Pug mill is used for
Preparation of clay
Moulding of clay
Drying of bricks
Burning of bricks
Q.5
Asphalt is obtained from
Petroleum distillation
Bitumen distillation
Plastic distillation
None of these
Q.6
Gneiss is obtained from
Igneous rocks
Metamorphic rocks
Sedimentary rocks
Sedimentary metamorphic rocks
Q.7
Early attainment of strength in rapid hardening cement is mainly due to
Gypsum
Finer grinding
Tri-calcium silicate
Tri-calcium aluminate
Q.8
Initial setting of cement is caused due to
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
Q.9
Cast iron is used for
Structural works in beams
Small sized water pipes
Columns and struts
None to these
Q.10
Wrought iron is used for
Structural works in beams
Small sized water pipes
Columns and struts
None to these
Q.11
Percentage of carbon content in mild steel is
Less than 0.25
Between 0.25 and 0.7
Between 0.7 and 1.5
Greater than 1.5
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