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
0 h : 0 m : 1 s