Q.1
Poor lime contains more than ________ of clay.
  • a) 5%
  • b) 10%
  • c) 20%
  • d) 30%
Q.2
Fat lime slakes slowly while hydraulic lime slakes vigorously.
  • a) True
  • b) False
Q.3
Percentage of impurities in limestones should not exceed ________ for preparing fat lime.
  • a) 5%
  • b) 8%
  • c) 10%
  • d) 15%
Q.4
Clay content in feebly hydraulic lime is about ________
  • a) 2-4%
  • b) 5-10%
  • c) 11-20%
  • d) 21-30%
Q.5
Which of the following is not true about hydraulic lime?
  • a) Hydraulic lime consists of clay and some amount of ferrous oxide
  • b) Hydraulic lime can set under water
  • c) It has a perfectly white colour
  • d) It is also known as water lime
Q.6
Pure limestones are indicated by _________ colour.
  • a) Brown
  • b) Blue
  • c) Grey
  • d) White
Q.7
Time taken by hydraulic lime to slake is about __________
  • a) 3-4 hours
  • b) 7-10 hours
  • c) 12-48 hours
  • d) 60-65 hours
Q.8
Which of the following statements about kankar is false?
  • a) It is used to manufacture natural hydraulic lime
  • b) It is available in nodular and block form
  • c) Kankar in nodular form can withstand heat without disintegration
  • d) It is a pure limestone
Q.9
Which of the following is not true about clamp burning?
  • a) It is adopted for manufacturing lime on a small scale
  • b) Best quality of lime is produced by this process
  • c) It is uneconomical to manufacture lime by this process on a large scale
  • d) Quantity of fuel required in this process is more
Q.10
Hydraulic lime resembles natural cement with about __________ of clay.
  • a) 15%
  • b) 20%
  • c) 30%
  • d) 60%
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