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MCQs

Total Questions : 104 | Page 7 of 11 pages
Question 61. Which type of bacteria has a rod shaped structure?
  1.    Bacilli
  2.    Cocci
  3.    Spirilla
  4.    Vibrio
 Discuss Question
Answer: Option A. -> Bacilli
Answer: (a).Bacilli
Question 62. Which of the following is a better test to identify Coliforms?
  1.    Coliform index
  2.    Multiple tube fermentation
  3.    MPN test
  4.    Membrane filter technique
 Discuss Question
Answer: Option D. -> Membrane filter technique
Answer: (d).Membrane filter technique
Question 63. Which of the following statement is/are correct regarding coliform bacteria?
i. It is gram negative
ii. It is rod shaped bacteria
iii. It is a harmless aerobic microorganism
  1.    i, ii, iii
  2.    ii, iii
  3.    i, iii
  4.    i, ii
 Discuss Question
Answer: Option A. -> i, ii, iii
Answer: (a).i, ii, iii
Question 64. ________ represents the bacterial density that is most likely to be present in water.
  1.    BOD
  2.    COD
  3.    MPN
  4.    Coliform index
 Discuss Question
Answer: Option C. -> MPN
Answer: (c).MPN
Question 65. What is the temperature at which MPN test is performed?
  1.    35°C
  2.    37 °C
  3.    40°C
  4.    45 °C
 Discuss Question
Answer: Option B. -> 37 °C
Answer: (b).37 °C
Question 66. Which of the following is the disease caused by bacterial infections?
  1.    Amoebic dysentery
  2.    Infectious hepatitis
  3.    Typhoid fever
  4.    Poliomyelitis
 Discuss Question
Answer: Option C. -> Typhoid fever
Answer: (c).Typhoid fever
Question 67. The number of bacterial colonies by Agar plate count test should not exceed ____ per ml for potable water.
  1.    1
  2.    10
  3.    100
  4.    1000
 Discuss Question
Answer: Option C. -> 100
Answer: (c).100
Question 68. Which bacteria results in the corrosion of iron and steel pipes embedded in soil?
  1.    Escherichia coli bacteria
  2.    Bacterium coli bacteria
  3.    Iron bacteria
  4.    Sulphur bacteria
 Discuss Question
Answer: Option D. -> Sulphur bacteria
Answer: (d).Sulphur bacteria
Question 69. Which bacteria cause the reddish brown deposits in the tank?
  1.    Escherichia coli bacteria
  2.    Bacterium coli bacteria
  3.    Iron bacteria
  4.    Sulphur bacteria
 Discuss Question
Answer: Option C. -> Iron bacteria
Answer: (c).Iron bacteria
Question 70. If the acid and gas are formed in the multiple tube fermentation technique, the test is _____
  1.    Positive
  2.    Continued
  3.    Negative
  4.    Discarded
 Discuss Question
Answer: Option A. -> Positive
Answer: (a).Positive

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