1. Which of the following are water borne diseases?
- Cholera
- AsthmaÂ
- Influenza
- Â TyphoidÂ
Answer :- a, d
2. In the figure below, the course of a river is shown. As it passes through the different areas, it accumulates different types of contaminants.
Match the locations A, B, C shown in the figure with the probable contaminants that may be present.
- A-III, B-II, C-I
- A-II, B-III, C-I
- A-I, B-III, C-II
- A-II, B-I, C-IIIÂ
Answer :- b
3. Adequate wastewater treatment can contribute to achieving which of the following UN Sustainable Development Goals (SDGs)?
- SDG 11 – Sustainable Cities and communitiesÂ
- SDG 6 – Clean water and sanitation
- SDG 4 – Quality Education
- SDG 3 – Good health and well-being
Answer :- a, b, d
4. Hardness in water causes
- Joint related issues
- Digestive issues
- Fluorosis
- Cholera
Answer :- a, b
5. Groundwater of a tier II town was found to be contaminated with ‘fecal coliforms’. What may be the possible reason for this?
- Fecal Coliforms are naturally occurring in soil
- Rainwater infiltration
- Leaching of sewage from septic tanks collecting fecal waste from individual households
- Infiltration from irrigated agricultural lands
Answer :- c
6. Which type of reactor is a ‘closed system’ where the concentration changes only due to reaction?
- Batch reactor
- Continuously stirred tank reactor (CSTR)
- Plug flow reactor
- All of the above
Answer :- a
7. Advection is bulk movement of fluid in one direction.
- True
- False
Answer :- a
8. In the image below, each graph depicts a type of mass transport. Choose the correct option.
- Graph 1: Advection and diffusion, Graph 2: Diffusion, Graph 3: Advection
- Graph 1: Advection and diffusion, Graph 2: Advection, Graph 3: Diffusion
- Graph 1: Diffusion, Graph 2: Advection, Graph 3: Advection and diffusion
- Graph 1: Advection, Graph 2: Diffusion, Graph 3: Advection and diffusion
Answer :- d
9. Equalization of the influent flow in a wastewater treatment plant is done to prevent shock loading.
- True
- False
Answer :- a