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Environmental Engineering: Nuclear Quiz 1
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Question 1
In a drained triaxial test, a saturated specimen of cohesionless sand fails under a deviator stress of 5.35 kg/cm2 when the cell pressure is 1.5 kg/cm2. The inclination of the failure plane to the horizontal is
Question 2
A soil has an angle of shearing of 30° and cohesion of 35 kN/m2. If the specimen of this soil is subjected to a tri-axial compression test, then the value of lateral pressure in the cell for failure to occur at total stress of 300 kN/m2 will be
Question 3
Which one of the following sets of processes is a part of self purification of streams
Question 4
Which of the following statement(s) is (are) CORRECT?
1. The presence of free ammonia in water indicates the presence of undecomposed organic matter and for potable waters, its value should not exceed 0.15 mg/l.
2. The partly oxidized organic matter in water in the form of nitrites, may not be harmful.
3. Once the flora of the intestinal tract has fully developed, usually after the age of six months, nitrate conversion to nitrite and subsequent methemoglobinemia from drinking water is seldom a problem.
1. The presence of free ammonia in water indicates the presence of undecomposed organic matter and for potable waters, its value should not exceed 0.15 mg/l.
2. The partly oxidized organic matter in water in the form of nitrites, may not be harmful.
3. Once the flora of the intestinal tract has fully developed, usually after the age of six months, nitrate conversion to nitrite and subsequent methemoglobinemia from drinking water is seldom a problem.
Question 5
Find five days BOD of the sample of a sewage whose DO was measured by diluting the sample to 20%, the initial DO after dilution was found out to be 12.5 mg/l. It was incubated for five days and then DO was found out to be 0 mg/l.
Question 6
Match List-I (Test) with List-II (Method/ Instrument) and select the correct answer using the codes given below the lists:
Question 7
For a central congested city whose population is 1.5 lakh, the fire demand as per National Board of Underwriters will be ____MLD.
Question 8
Primary treatment of sewage consist of ........
Question 9
Which one of the following statement is correct?
Question 10
If the BOD4 of a wastewater sample is 90 mg/l and reaction rate constant K(base ‘e’) is 0.345 per day, the amount of BOD remaining (in mg/l) in the given sample after 12 days is
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Aug 26ESE & GATE CE
