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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.

Get Started

•   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 – Construction of Septic Tank

Posted on September 19, 2017 by Manish

This set of Environmental Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Construction of Septic Tank”.

1. The disposal of sewage from the septic tank is done by which of the following?
a) Clarifier
b) Soak pit
c) Aerated lagoon
d) Lamp holes
View Answer

Answer: b
Explanation: Soak pit is a circular pit through which sewage is disposed in the soil.
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2. The detention period of a septic tank is
a) 2 hours
b) 12-36 hours
c) 4 hours
d) 1 week
View Answer

Answer: b
Explanation: The septic tank has a long detention period in comparison to sedimentation than with a detention period of 12 to 36 hours.

3. The concentration of biodegradable organic matter after the septic tank is
a) 50ppm
b) 100ppm
c) 200ppm
d) 75ppm
View Answer

Answer: c
Explanation: The effluent contains 200-250 ppm of biodegradable organic matter after the treatment from the septic tank.

4. What is the maximum design flow of sewage in a septic tank?
a) 70 liters per person per day
b) 100 liters per person per day
c) 30 liters per person per day
d) 40 liters per person per day
View Answer

Answer: a
Explanation: The design flow of sewage in a septic tank lies between 40 to 70 liters per person per day.
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5. Which of the following is not the method of disposal of sewage from septic tank?
a) Upflow anaerobic filter
b) Soil absorption system
c) Vacuum filter
d) Biological filters
View Answer

Answer: c
Explanation: Vacuum filter is used in the sludge dewatering process and upflow anaerobic filter, soil absorption system and biological filter are the method of disposal of sewage from the septic tank.

6. The minimum depth of septic tank as per design consideration is
a) 1.8m
b) 1m
c) 1.2m
d) 1.5m
View Answer

Answer: c
Explanation: The design depth of septic tank lies between 1.2m and 1.8m, so its minimum depth is 1.2m.

7. What is the type of filter used in septic tank when the rate of percolation is 90 minutes?
a) Slow sand filter
b) Rapid sand filter
c) Biological filter
d) Trickling filter
View Answer

Answer: c
Explanation: Biological filters are used in septic tank for treatment of sewage when the percolation rate is >60minutes. The percolation rate is the rate at which water flows through the soil.

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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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer and SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage & Cluster Administration, Advanced C Programming, SAN Storage Technologies, SCSI Internals and Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him below:
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