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Environmental Engineering Multiple Choice Questions | MCQs | Quiz

Environmental Engineering Interview Questions and Answers
Practice Environmental Engineering questions and answers for interviews, campus placements, online tests, aptitude tests, quizzes and competitive exams.

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•   Water Demand
•   Population Forecasting
•   ↓ Water Characteristics ↓
•   Physical Characteristics
•   Chemical Characteristics
•   Biological Characteristics
•   Various Unit Operations
•   Screens & Aerators Types
•   Sedimentation Theory
•   Sedimentation Design
•   Sedimentation Coagulation
•   Flocculation & Clarification
•   Filtration Theory
•   Filter Media
•   Slow Sand Filter
•   Rapid Sand Filter
•   Filter Operation Problems
•   Slow & Rapid Sand Filter
•   Filtration Hydraulics
•   Pressure Filter
•   Dual & Mixed Media Filter
•   Various Other Filters
•   Disinfection Methods
•   Chlorination
•   Chlorination Forms
•   Chlorination Factors
•   Chemical Disinfection
•   Iodine & Ozone Treatment
•   Hardness Types
•   Lime Soda Process
•   Zeolite Process
•   Iron & Manganese Removal
•   Activated Carbon Treatment
•   Fluoridation & Defluoridation
•   Desalination
•   Pumps Types
•   Centrifugal Pump
•   Reciprocating Pump
•   Well Pump
•   Pumping Units Selection
•   Pipes Types
•   Valves Types
•   Distribution System Layout
•   Service Connection
•   Conservancy System
•   Water Carriage System
•   Dry Weather Flow
•   Storm Water Flow
•   Rational Method
•   Hydraulic Formulae
•   Minimum & Maximum Flow
•   Hydraulic Elements
•   Egg Shaped Sewers
•   Sewers Types
•   Sewers Materials
•   Sewers Joints & Shapes
•   Sewer Forces & Loads
•   Sewer Devices
•   Sewage Pumping
•   ↓ Waste Water ↓
•   Physical Characteristics
•   Chemical Characteristics
•   Biological Characteristics
•   Oxygen Demand
•   Relative Stability
•   Sewage Disposal
•   River - Pollution Zones
•   Oxygen Sag Curve
•   Lake - Biological Zones
•   Unit Operations Types
•   Racks & Screen
•   Tanks & Vacuum Floatation
•   Settling Types
•   Settling Tanks Types
•   Sedimentation Tank Design
•   Chemical Clarification
•   Sewage Filter Types
•   Conventional Trickling Filter
•   High Rate Trickling Filter
•   Diffused Air System
•   Sludge Treatment
•   Sludge Digestion Tank
•   Activated Sludge Plant
•   Sludge Dewatering
•   Stabilization Ponds
•   Septic Tank Construction
•   Imhoff Tank Construction
•   Municipal Solid Waste
•   Air Pollutants
•   Stack Height Design
•   Plumes Types
•   Air Pollution Control Device
•   Air Pollutants Dispersion
•   Air Pollution Analysis
•   Air Pollution Effects - 1
•   Air Pollution Effects - 2
•   Air Pollution Sources - 1
•   Air Pollution Sources - 2
•   Air Pollution Meteorology
•   Air Quality
•   Atmosphere
•   Climate Model
•   Greenhouse Gases - 1
•   Greenhouse Gases - 2
•   Ozone Depletion
•   Particulates
•   Acid Rain
•   Aerosols

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Environmental Engineering Questions and Answers – Physical Characteristics of Waste Water

Posted on September 19, 2017 by Manish

This set of Environmental Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Physical Characteristics of Waste Water”.

1. Which of the following represents the physical characteristics of water?
a) Chloride content
b) BOD
c) Turbidity
d) COD
View Answer

Answer: c
Explanation: Turbidity represents the physical characteristic of water, whereas BOD, COD and chloride content represents the chemical characteristic of water.
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2. Which of the following is measured in mg/L?
a) Unit weight
b) Coefficient of cohesion
c) Discharge
d) Turbidity
View Answer

Answer: d
Explanation: The turbidity of waste water is measured in mg/L. The other units of turbidity are ppm, NTU and JTU.

3. Which of the following instrument is used to measure turbidity?
a) Olfactometer
b) Turbidity meter
c) Colorimeter
d) Spectrophotometer
View Answer

Answer: b
Explanation: Turbidity can be measured by Jackson’s turbidity meter, Baylis turbidity meter, turbidity rod and Nephelometer.

4. When the sewage becomes stronger, the turbidity of wastewater
a) Increases
b) Decreases
c) Becomes constant
d) Slightly decrease
View Answer

Answer: a
Explanation: When the sewage becomes stronger, the milkiness in water increases and thus, the turbidity increases.

5. Which color indicates the fresh sewage?
a) Pink
b) Red
c) Black
d) Grey
View Answer

Answer: d
Explanation: If the color of sewage is grey, yellow and light brown, then it means that the sewage is fresh.

6. The color of the septic sewage is
a) Pink
b) Red
c) Black
d) Grey
View Answer

Answer: c
Explanation: The color of septic sewage is black or dark brown. It contains either little or no oxygen.
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7. The odor in wastewater is measured by
a) Osmoscope
b) Chromatography
c) Olfactometer
d) Turbidity meter
View Answer

Answer: a
Explanation: The odor in waste water is measured by Osmoscope which consist of two 10mm diameter glass tubes which is 300mm long and 8mm wide.

8. In India, the average temperature of sewage is
a) 10oC
b) 20oC
c) 40oC
d) 80oC
View Answer

Answer: b
Explanation: The average temperature of sewage is 20oC. The temperature of sewage is higher than that of the water supply.

9. Identify the incorrect statement from the following?
a) High odor intensity indicates odorless water
b) Fresh sewage is odorless
c) Turbidity can be measured by turbidity rod
d) NTU is a unit of turbidity
View Answer

Answer: a
Explanation: If the odor intensity of water is 6, it indicates extremely strong odor and when it is 0, it indicates the odorless water.

10. _______ indicates the freshness of sewage.
a) Turbidity
b) Color
c) Temperature
d) COD
View Answer

Answer: b
Explanation: The color indicates the freshness of sewage. It can be detected easily by the naked eye.

11. ______ represents the number of dilutions required to reduce odor.
a) Dispersion
b) Threshold odor number
c) BOD
d) COD
View Answer

Answer: b
Explanation: The threshold odor number is equal to the volume of samples of water required to add to 100 units of odorless fresh water at which the mixture gives the first detectable odor.

12. The odor quality of Amines is
a) Rotten egg
b) Fishy
c) Fecal matter
d) Decayed cabbage
View Answer

Answer: b
Explanation: The odor quality of Amines is fishy and its chemical formula is CH3NH2.
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13. The odor quality of compound is ammoniacal. Identify the type of compound from the following options.
a) Acetic acid
b) Benzene
c) Ammonia
d) Methane
View Answer

Answer: c
Explanation: Ammonia has an ammoniacal type of odor quality and its chemical formula is NH3.

14. The wastewater from the kitchen is an example of
a) Black water
b) Yellow water
c) Green water
d) Grey water
View Answer

Answer: d
Explanation: The wastewater from the kitchen is an example of grey water. It also includes water from the bathroom without urine and feces.

15. The type of wastewater from the flushing operation of toilet is
a) Green water
b) Red water
c) Black water
d) Brown water
View Answer

Answer: c
Explanation: The type of wastewater from the flushing operation of toilet is black in color and if it does not include urine, then it is brown in color.

Sanfoundry Global Education & Learning Series – Environmental Engineering.
To practice all areas of Environmental Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.

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Environmental Engineering Questions and Answers – Chemical Characteristics of Waste Water »
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