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MCQs

Total Questions : 180 | Page 6 of 18 pages
Question 51. E – coli was formerly known as _________
  1.    F. Coli
  2.    B. Coli
  3.    G. Coli
  4.    R. Coli
 Discuss Question
Answer: Option B. -> B. Coli
Answer: (b).B. Coli
Question 52. ______ sample collected at an instant particularly.
  1.    Composite
  2.    Grab
  3.    Integrated
  4.    Differential
 Discuss Question
Answer: Option B. -> Grab
Answer: (b).Grab
Question 53. If fluoride concentration in drinking water increases to more than ______ ppm, it causes fluorosis.
  1.    2.5
  2.    2
  3.    1.5
  4.    3
 Discuss Question
Answer: Option C. -> 1.5
Answer: (c).1.5
Question 54. Which of the following samples is also known as catch sample?
  1.    Integrated
  2.    Composite
  3.    Grab
  4.    Scratch
 Discuss Question
Answer: Option C. -> Grab
Answer: (c).Grab
Question 55. What is the desirable limit for sulphates in drinking water?
  1.    180 ng/L
  2.    230 mg/L
  3.    150 mg/L
  4.    340 mg/L
 Discuss Question
Answer: Option C. -> 150 mg/L
Answer: (c).150 mg/L
Question 56. IS: 455 is associated with ____________
  1.    Portland slag cement
  2.    Ordinary Portland cement
  3.    High alumina cement
  4.    Super sulphated cement
 Discuss Question
Answer: Option A. -> Portland slag cement
Answer: (a).Portland slag cement
Question 57. Which of the following cement is used for marine structures?
  1.    Rapid hardening cement
  2.    Hydrophobic cement
  3.    High Alumina cement
  4.    Super sulphated cement
 Discuss Question
Answer: Option C. -> High Alumina cement
Answer: (c).High Alumina cement
Question 58. Polyhydroxy compounds are ________
  1.    Accelerating admixtures
  2.    Retarding admixtures
  3.    Water reducing admixtures
  4.    Air entraining admixtures
 Discuss Question
Answer: Option C. -> Water reducing admixtures
Answer: (c).Water reducing admixtures
Question 59. Which of the following is used as retarding admixture?
  1.    Calcium chloride
  2.    Fluosilicates
  3.    Treitanlamine
  4.    Starch
 Discuss Question
Answer: Option D. -> Starch
Answer: (d).Starch
Question 60. Plasticizing admixture means __________
  1.    Accelerating admixtures
  2.    Water reducing admixtures
  3.    Air in training admixtures
  4.    Superplasticizers
 Discuss Question
Answer: Option B. -> Water reducing admixtures
Answer: (b).Water reducing admixtures

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