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Test: Biological Characteristics Of Water


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10 Questions MCQ Test Environmental Engineering | Test: Biological Characteristics Of Water

Test: Biological Characteristics Of Water for Chemical Engineering 2022 is part of Environmental Engineering preparation. The Test: Biological Characteristics Of Water questions and answers have been prepared according to the Chemical Engineering exam syllabus.The Test: Biological Characteristics Of Water MCQs are made for Chemical Engineering 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Biological Characteristics Of Water below.
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Test: Biological Characteristics Of Water - Question 1

 Which type of bacteria has a rod shaped structure?

Detailed Solution for Test: Biological Characteristics Of Water - Question 1

Explanation: Bacilli (Singular-Bacillus) has a rod shaped structure. Cocci has a spherically shaped structure, Spirilla has a spiral shaped structure and Vibrio has a comma shaped structure.

Test: Biological Characteristics Of Water - Question 2

 ________ represents the bacterial density that is most likely to be present in water.

Detailed Solution for Test: Biological Characteristics Of Water - Question 2

Explanation: Most Probable Number is a number that indicates the bacterial density present in water.BOD and COD are the terms related to the oxygen required by microorganism to oxidize organic and inorganic matter.

Test: Biological Characteristics Of Water - Question 3

Which of the following is a better test to identify Coliforms?

Detailed Solution for Test: Biological Characteristics Of Water - Question 3

Explanation: Membrane filter technique is a better and simpler technique to identify Coliforms. Various results are obtained in a shorter time than multiple tube fermentation technique. MPN test and coliform index are not used now.

Test: Biological Characteristics Of Water - Question 4

What is the temperature at which MPN test is performed?

Detailed Solution for Test: Biological Characteristics Of Water - Question 4

Explanation: MPN test is performed at 37oC where different samples of water are mixed with lactose broth and incubated in test tubes for 48 hours.

Test: Biological Characteristics Of Water - Question 5

Which of the following statement is/are correct regarding coliform bacteria?
1. It is gram negative
2. It is rod shaped bacteria
3. It is a harmless aerobic microorganism

Detailed Solution for Test: Biological Characteristics Of Water - Question 5

Explanation: Coliform bacteria is a gram negative, rod shaped and harmless aerobic microorganism which is found in the intestine of warm blooded animals including human beings.

Test: Biological Characteristics Of Water - Question 6

 Which of the following is the disease caused by bacterial infections?

Detailed Solution for Test: Biological Characteristics Of Water - Question 6

Explanation:Amoebic dysentery is caused by protozoan infection, Infectious hepatitis and Poliomyelitis are caused by a viral infection and Typhoid fever is caused by bacterial infection.

Test: Biological Characteristics Of Water - Question 7

The number of bacterial colonies by Agar plate count test should not exceed ____ per ml for potable water.

Detailed Solution for Test: Biological Characteristics Of Water - Question 7

Explanation: Agar plate count test is a test to count the number of bacterial colonies growing on a specified medium and the permissible limit for the number of bacterial colonies is 100 per ml.

Test: Biological Characteristics Of Water - Question 8

 If the acid and gas are formed in the multiple tube fermentation technique, the test is _____

Detailed Solution for Test: Biological Characteristics Of Water - Question 8

Explanation: The acid and gas formation in Multiple tube fermentation technique indicates that the test is positive and there is coliform bacteria in the sample.

Test: Biological Characteristics Of Water - Question 9

 Which bacteria cause the reddish brown deposits in the tank?

Detailed Solution for Test: Biological Characteristics Of Water - Question 9

Explanation: The growth of Iron bacteria causes the discoloration of tank due to reddish brown deposits and turbidity in wat

Test: Biological Characteristics Of Water - Question 10

Which bacteria results in the corrosion of iron and steel pipes embedded in soil?

Detailed Solution for Test: Biological Characteristics Of Water - Question 10

Explanation: Sulphur bacteria cause the corrosion of iron and steel pipes embedded in soil. They are both aerobic and anaerobic and are more destructive in marshy or clay soils where anaerobic conditions prevails.

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