1. Which of the following causes a decrease in per capita consumption ?
A. use of metering system
B. good quality of water
C. better standard of living of the people
D. hotter climate
✅ The correct answer is option A.
Environmental Engineering MCQs
2. The suitable layout of a distribution system for irregularly growing town is_______________?
A. dead end system
B. grid iron system
C. radial system
D. ring system
✅ The correct answer is option A.
3. A pipe conveying sewage from plumbing system of a single building to common sewer or point of immediate disposal is called________________?
A. house sewer
B. lateral sewer
C. main sewer
D. submain sewer
✅ The correct answer is option A.
4. Alkalinity in water is expressed as milli-grams per litre in terms of equivalent_______________?
A. calcium carbonate
B. magnesium carbonate
C. sodium carbonate
D. calcium hydroxide
✅ The correct answer is option A.
5. The overflow rate for plain sedimentation tanks is about__________________?
A. 500 to 750 litres/hour/ m2
B. 1000 to 1250 litres/hour/ m2
C. 1250 to 1500 litres/hour/m2
D. 1500 to 2000 litres/hour/m2
✅ The correct answer is option A.
6. Turbidity is measured on_______________?
A. standard silica scale
B. standard cobalt scale
C. standard platinum scale
D. platinum cobalt scale
✅ The correct answer is option A.
7. The effective size of sand particles used in slow sand filters is_______________?
A. 0.25 to 0.35 mm
B. 0.35 to 0.60 mm
C. 0.60 to 1.00 mm
D. 1.00 to 1.80 mm
✅ The correct answer is option A.
8. Assertion A: Slow sand filters are more efficient in removal of bacteria than rapid sand filters. Reason R : The sand used in slow sand filters is finer than that in rapid sand filters. Select your answer based on the coding system given below?
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true
✅ The correct answer is option A.
9. Standard EDTA (ethylene diamine tetra acetic aciD. solution is used to determine the_______________?
A. hardness in water
B. turbidity in water
C. dissolved oxygen in water
D. residual chlorine in water
✅ The correct answer is option A.
10. Air binding phenomena in rapid sand filters occur due to_________________?
A. excessive negative head
B. mud ball formation
C. higher turbidity in the effluent
D. low temperature
✅ The correct answer is option A.