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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 – Devices Associated with Sewer

Posted on September 19, 2017 by Manish

This set of Environmental Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Devices Associated with Sewer”.

1. Which of the following is not a sewer appurtenance?
a) Storm regulator
b) Flushing tank
c) Water tank
d) Manholes
View Answer

Answer: c
Explanation: Sewer appurtenance are the structures which are constructed for the efficient performance and maintenance of sewers. The water tank is not a sewer appurtenance.
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2. ______ provides the working space for maintenance and inspection of sewers.
a) Lamp holes
b) Manholes
c) Flushing tanks
d) Working chamber
View Answer

Answer: d
Explanation: Working chamber provides the working space for maintenance and inspection of sewers. It is situated at the lower part of the manhole.

3. The minimum thickness of the side wall of the manhole is
a) 50mm
b) 100mm
c) 225mm
d) 300mm
View Answer

Answer: c
Explanation: The minimum thickness of the side wall of the manhole is 225mm and they are commonly made of bricks.

4. Which of the following is situated above the working chamber in a deep manhole?
a) Main sewer
b) Access shaft
c) Branch sewer
d) Channel
View Answer

Answer: b
Explanation: The access shaft lies above the working chamber which is just below the manhole cover.

5. If the depth of excavation is 4m. What is the thickness of the brick wall of manhole?
a) 12cm
b) 16cm
c) 20cm
d) 26cm
View Answer

Answer: d
Explanation: The thickness of brick wall of manhole (in cm) = 10 + 4*depth of excavation (in m) = 10 + 4*4 = 26cm.

6. Into how many types manholes are classified on the basis of depth of manhole?
a) 3
b) 5
c) 6
d) 7
View Answer

Answer: a
Explanation: Manholes are classified into Shallow, Normal and Deep on the basis of depth of the manhole.
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7. The minimum diameter of the access shaft for a circular manhole is
a) 60cm
b) 20cm
c) 30cm
d) 10cm
View Answer

Answer: a
Explanation: Access shaft is the upper portion of manhole whose minimum diameter for a circular manhole is 60cm.

8. The manhole in which inclined pipe for transfer of sewage from branch to main sewer is
a) Deep manhole
b) Ramp
c) Drop manhole
d) Normal manhole
View Answer

Answer: b
Explanation: Ramp has an inclined pipe for the transfer of sewage which is used when the drop is less.

9. The thickness of the manhole frame is
a) 10cm
b) 15cm
c) 20cm
d) 40cm
View Answer

Answer: c
Explanation: The manhole frame is made of cast iron having 10cm width and the thickness is 20cm.

10. The minimum diameter of working chamber for a circular manhole is
a) 0.8m
b) 0.9m
c) 1m
d) 1.2m
View Answer

Answer: d
Explanation: The working chamber is the lower portion of the manhole having a minimum diameter of 1.2 m.

11. The manhole in which vertical pipe is used for the transfer of sewage from branch to main sewer is
a) Deep manhole
b) Ramp
c) Drop manhole
d) Normal manhole
View Answer

Answer: c
Explanation: Drop manholes are provided with vertical pipe so that the sewage does not fall on the people working at manhole.

12. Which sewer appurtenance allows lamp in the sewer?
a) Catch basin
b) Drop manhole
c) Lamp hole
d) Storm regulators
View Answer

Answer: c
Explanation: The lamp hole is acting as an inspection device where lamps are inserted.It is used when the construction of manhole is difficult.
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13. Which sewer appurtenance is used for removing rainwater from the roads?
a) Catch basin
b) Gullies
c) Lamp hole
d) Storm regulators
View Answer

Answer: b
Explanation: Gullies are placed along the roadside at an interval of 30-60m to remove the rainwater from the road.

14. ________ removes oil and grease from the sewage.
a) Catch basin
b) Gullies
c) Grease and oil traps
d) Storm regulators
View Answer

Answer: c
Explanation: The oil and grease sticks to the sides of the sewer and reduce the sewer capacity. So, it is essential to remove oil and grease, which can be done by the device called as Grease and oil traps.

15. Which device is used to prevent the clogging of sewer pipes?
a) Flushing tank
b) Drop manhole
c) Lamp hole
d) Storm regulators
View Answer

Answer: a
Explanation: Flushing tank is used to flush and clean the sewer to prevent it from clogging. This is done either by automatic flushing tank or by hand operated flushing tank.

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.

« Prev Page - Environmental Engineering Questions and Answers – Forces and Loads on Sewer
» Next Page - Environmental Engineering Questions and Answers – Inverted Siphon, Storm Regulator and Sewage Pumping

« Environmental Engineering Questions and Answers – Forces and Loads on Sewer
Environmental Engineering Questions and Answers – Inverted Siphon, Storm Regulator and Sewage Pumping »
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