WorksheetsWaste Management
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
What does sewerage refer to?
a)
Treatment of rainwater
b)
Stormwater overflows only
c)
Infrastructure conveying sewage
d)
Irrigation pipes
2.
Where does Singapore's Deep Tunnel Sewerage System (DTSS) deliver used water?
a)
Reservoirs
b)
Septic tanks
c)
Water Reclamation Plants
d)
To the sea
3.
Which plant is part of DTSS Phase 1?
a)
Tuas WRP
b)
Jurong WRP
c)
Changi WRP
d)
Punggol WRP
4.
What is the capacity of the Changi Water Reclamation Plant?
a)
400,000 m3/day
b)
600,000 m3/day
c)
800,000 m3/day
d)
1,000,000 m3/day
5.
Which of the following is a key feature of DTSS Phase 2?
a)
Open channel drains
b)
Sewer rehabilitation programme
c)
Tuas Water Reclamation Plant
d)
Vertical shaft irrigation
6.
Why do old sewers need rehabilitation?
a)
Air blockage
b)
Tree root intrusion and wear
c)
To improve ventilation
d)
To eliminate rodents
7.
Which is a method of sewer rehabilitation?
a)
Dry lining
b)
Chemical bleaching
c)
CIPP
d)
Electrolysis
8.
Which method uses a spiraling PVC liner?
a)
CIPP
b)
Fold and form
c)
Spiral wound lining
d)
Direct injection
9.
What does PWCS stand for?
a)
Public Water Channel System
b)
Pneumatic Waste Conveyance System
c)
Partial Waste Collection Scheme
d)
Pipeline Waste Cooling System
10.
What is a benefit of PWCS?
a)
Increases waste volume
b)
Generates more heat
c)
Reduces manpower and pests
d)
Manual collection is needed
11.
What does the automated PWCS system eliminate?
a)
Need for recycling
b)
Odour from open chutes
c)
All waste types
d)
Biodegradable waste
12.
Why is the PWCS more environmentally friendly?
a)
Requires more water
b)
Needs frequent washing
c)
Reduces decomposition and pests
d)
Burns waste cleanly
13.
What happens to the collected waste in PWCS?
a)
Is dumped into the sea
b)
Is burnt in chutes
c)
Stored in sealed containers
d)
Poured into open bins
14.
What is a private sewer?
a)
Pipes owned by PUB
b)
Drainage from city streets
c)
Non-public pipes maintained by property owners
d)
Government treatment unit
15.
What does PUB do to monitor sewer conditions?
a)
Ignore old sewers
b)
Install CCTV inside pipes
c)
Conduct systematic checks and repairs
d)
Add chlorine
16.
What causes infiltration and exfiltration in sewer lines?
a)
High pH levels
b)
Air flow changes
c)
Leaks and ground movement
d)
Strong water pressure
17.
What is one aesthetic concern of untreated leaks?
a)
Air pollution
b)
Spoiled views and recreational waters
c)
Broken buildings
d)
Pest attraction
18.
What technology is used in DTSS for pipe installation?
a)
Pipe bursting
b)
Tunneling and pipe jacking
c)
Surface trenching
d)
Hot pipe expansion
19.
What is the goal of the Sewer Rehabilitation Programme?
a)
To reduce noise levels
b)
To replace plastic pipes
c)
To maintain and restore sewer functionality
d)
To add more drain covers
20.
How often is maintenance needed on major sewer lines?
a)
Once every 20 years
b)
Rarely needed
c)
Regularly and systematically
d)
Every decade
100 %
