AR SW Solid Waste Contractor Exam
Questions And Correct Answers
(Verified Answers) Plus Rationale2026
Q&A| Instant Download Pdf
1. What is the primary goal of a solid waste management program?
A) To increase landfill capacity
B) To reduce waste generation
C) To protect public health and the environment
D) To generate energy from waste
Rationale: The primary goal of solid waste management is to protect
public health and the environment by proper handling, disposal, and
treatment of waste.
2. Which of the following is considered hazardous waste?
A) Food scraps
B) Plastic bottles
C) Used motor oil
D) Yard trimmings
Rationale: Hazardous waste includes materials that are flammable,
toxic, corrosive, or reactive, such as used motor oil.
3. What is the process of breaking down organic waste by
microorganisms called?
A) Incineration
B) Composting
C) Landfilling
D) Pyrolysis
Rationale: Composting is the natural process where microorganisms
decompose organic matter, producing nutrient-rich compost.
,4. Which method is most suitable for long-term disposal of solid waste?
A) Recycling
B) Landfilling
C) Composting
D) Anaerobic digestion
Rationale: Landfilling is a widely used method for long-term disposal
of solid waste in engineered sites.
5. What is the key environmental concern associated with landfills?
A) Air pollution only
B) Noise pollution
C) Leachate and methane generation
D) Visual pollution
Rationale: Landfills produce leachate, which can contaminate
groundwater, and methane gas, a potent greenhouse gas.
6. What does the “3Rs” principle in waste management stand for?
A) Reduce, React, Reuse
B) Recycle, Reprocess, Reduce
C) Reduce, Reuse, Recycle
D) Reuse, Remove, Reduce
Rationale: The 3Rs principle encourages waste reduction, reuse of
materials, and recycling to conserve resources and reduce landfill
burden.
7. Which type of solid waste is generated by households, schools, and
offices?
A) Industrial waste
B) Municipal solid waste (MSW)
C) Medical waste
D) Construction debris
Rationale: Municipal solid waste consists of everyday items discarded
by households and commercial establishments.
8. What is the first step in effective waste management?
A) Transportation
B) Treatment
C) Waste generation reduction
D) Landfilling
Rationale: Reducing waste at the source is the most effective step in
managing waste sustainably.
, 9. Which of the following is NOT a method of recycling?
A) Material recovery
B) Incineration
C) Composting
D) Reprocessing
Rationale: Incineration involves burning waste for energy and is not a
recycling method.
10. Which gas is primarily responsible for odor problems in
landfills?
A) Carbon dioxide
B) Methane
C) Oxygen
D) Nitrogen
Rationale: Methane and other volatile compounds from decomposing
organic waste produce odors in landfills.
11. What type of waste should never be disposed of in a regular
landfill?
A) Paper waste
B) Medical sharps
C) Plastic containers
D) Food waste
Rationale: Medical sharps pose health risks and require special
handling, not regular landfill disposal.
12. What is the purpose of waste segregation?
A) To increase landfill volume
B) To make waste heavier
C) To separate waste streams for recycling and proper disposal
D) To reduce transportation costs only
Rationale: Segregating waste ensures that recyclable, hazardous, and
organic wastes are properly managed.
13. Which of the following is a biodegradable material?
A) Glass
B) Plastic
C) Food scraps
D) Aluminum cans
Rationale: Biodegradable materials can be decomposed by
microorganisms, like food scraps and yard waste.
Questions And Correct Answers
(Verified Answers) Plus Rationale2026
Q&A| Instant Download Pdf
1. What is the primary goal of a solid waste management program?
A) To increase landfill capacity
B) To reduce waste generation
C) To protect public health and the environment
D) To generate energy from waste
Rationale: The primary goal of solid waste management is to protect
public health and the environment by proper handling, disposal, and
treatment of waste.
2. Which of the following is considered hazardous waste?
A) Food scraps
B) Plastic bottles
C) Used motor oil
D) Yard trimmings
Rationale: Hazardous waste includes materials that are flammable,
toxic, corrosive, or reactive, such as used motor oil.
3. What is the process of breaking down organic waste by
microorganisms called?
A) Incineration
B) Composting
C) Landfilling
D) Pyrolysis
Rationale: Composting is the natural process where microorganisms
decompose organic matter, producing nutrient-rich compost.
,4. Which method is most suitable for long-term disposal of solid waste?
A) Recycling
B) Landfilling
C) Composting
D) Anaerobic digestion
Rationale: Landfilling is a widely used method for long-term disposal
of solid waste in engineered sites.
5. What is the key environmental concern associated with landfills?
A) Air pollution only
B) Noise pollution
C) Leachate and methane generation
D) Visual pollution
Rationale: Landfills produce leachate, which can contaminate
groundwater, and methane gas, a potent greenhouse gas.
6. What does the “3Rs” principle in waste management stand for?
A) Reduce, React, Reuse
B) Recycle, Reprocess, Reduce
C) Reduce, Reuse, Recycle
D) Reuse, Remove, Reduce
Rationale: The 3Rs principle encourages waste reduction, reuse of
materials, and recycling to conserve resources and reduce landfill
burden.
7. Which type of solid waste is generated by households, schools, and
offices?
A) Industrial waste
B) Municipal solid waste (MSW)
C) Medical waste
D) Construction debris
Rationale: Municipal solid waste consists of everyday items discarded
by households and commercial establishments.
8. What is the first step in effective waste management?
A) Transportation
B) Treatment
C) Waste generation reduction
D) Landfilling
Rationale: Reducing waste at the source is the most effective step in
managing waste sustainably.
, 9. Which of the following is NOT a method of recycling?
A) Material recovery
B) Incineration
C) Composting
D) Reprocessing
Rationale: Incineration involves burning waste for energy and is not a
recycling method.
10. Which gas is primarily responsible for odor problems in
landfills?
A) Carbon dioxide
B) Methane
C) Oxygen
D) Nitrogen
Rationale: Methane and other volatile compounds from decomposing
organic waste produce odors in landfills.
11. What type of waste should never be disposed of in a regular
landfill?
A) Paper waste
B) Medical sharps
C) Plastic containers
D) Food waste
Rationale: Medical sharps pose health risks and require special
handling, not regular landfill disposal.
12. What is the purpose of waste segregation?
A) To increase landfill volume
B) To make waste heavier
C) To separate waste streams for recycling and proper disposal
D) To reduce transportation costs only
Rationale: Segregating waste ensures that recyclable, hazardous, and
organic wastes are properly managed.
13. Which of the following is a biodegradable material?
A) Glass
B) Plastic
C) Food scraps
D) Aluminum cans
Rationale: Biodegradable materials can be decomposed by
microorganisms, like food scraps and yard waste.
