Concrete Technology MCQs with answers Page - 86

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A

Admin • 833.24K Points
Coach

Q. The final operation of finishing floors, is known as

  • (A) screeding
  • (B) floating
  • (C) trowelling
  • (D) finishing

A

Admin • 833.24K Points
Coach

Q. Transport of concrete by pumps, is done for a distance of

  • (A) 100 m
  • (B) 200 m
  • (C) 300 m
  • (D) 400 m

A

Admin • 833.24K Points
Coach

Q. Curing

  • (A) reduces the shrinkage of concrete
  • (B) preserves the properties of concrete
  • (C) prevents the loss of water by evaporation
  • (D) all of the above

A

Admin • 833.24K Points
Coach

Q. The datum temperature for maturity by Plowman, is

  • (A) 23°c
  • (B) 0°
  • (C) - 5.6°c
  • (D) - 11.7°c

A

Admin • 833.24K Points
Coach

Q. The bulk density of aggregates, is generally expressed as

  • (A) tonnes/cubic metre
  • (B) kg/cubic metre
  • (C) kg/litre
  • (D) g/cm3

A

Admin • 833.24K Points
Coach

Q. The factor which affects workability, is

  • (A) water content and its temperature
  • (B) shape and size of the aggregates
  • (C) air entraining agents
  • (D) all the above

A

Admin • 833.24K Points
Coach

Q. Proper batching ensures

  • (A) economy
  • (B) durability
  • (C) workability
  • (D) all the above

A

Admin • 833.24K Points
Coach

Q. The ratio of the length to breadth of a wooden float, is

  • (A) 4.5
  • (B) 5.5
  • (C) 6.5
  • (D) 7.5

A

Admin • 833.24K Points
Coach

Q. Percentage of pozzolanic material containing clay upto 80% used for the manufacture of pozzolana cement, is

  • (A) 30 %
  • (B) 40 %
  • (C) 50 %
  • (D) 60 %

A

Admin • 833.24K Points
Coach

Q. The grade of concrete not recommended by I.S. : 456, is

  • (A) m 100
  • (B) m 200
  • (C) m 300
  • (D) m 500

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