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Latest MPPCB Assistant Engineer Environment Exam Question (Objective Questions), MCQ in English

Subjects : Environmental Engineering, Environmental Laws & Regulations, Pollution & Control, General Knowledge & Current Affairs, Computer Knowledge

Question Bank MPPCB Assistant Engineer (Environment) Exam - English
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Environmental Engineering

Question 1Single Answer
Which design parameter primarily governs the sizing of a primary sedimentation tank in wastewater treatment?
  1. A
    Hydraulic retention time
  2. B
    Sludge age
  3. C
    Aeration efficiency
  4. D
    Chlorine demand
Question 2Single Answer
Which factor most critically influences the efficiency of coagulation in water treatment?
  1. A
    Temperature only
  2. B
    pH and coagulant dose optimization
  3. C
    Tank depth
  4. D
    Pipe diameter
Question 3Single Answer
Which parameter determines oxygen requirements in an activated sludge process?
  1. A
    Turbidity
  2. B
    Alkalinity only
  3. C
    Total dissolved solids
  4. D
    Biochemical Oxygen Demand loading
Question 4Single Answer
Which design criterion is most relevant for trickling filters?
  1. A
    Food to microorganism ratio
  2. B
    Chlorination time
  3. C
    Sludge volume index
  4. D
    Hydraulic and organic loading rates
Question 5Single Answer
Which unit operation removes dissolved organic matter effectively?
  1. A
    Screening
  2. B
    Grit removal
  3. C
    Aeration in biological treatment
  4. D
    Sedimentation only
Question 6Single Answer
Which parameter is critical for sludge settling characteristics?
  1. A
    Sludge Volume Index
  2. B
    pH only
  3. C
    Temperature only
  4. D
    Turbidity
Question 7Single Answer
Which treatment process is most effective for nitrogen removal?
  1. A
    Nitrification–denitrification
  2. B
    Sedimentation
  3. C
    Filtration
  4. D
    Disinfection
Question 8Single Answer
Which factor affects filtration rate in rapid sand filters?
  1. A
    Coagulant type only
  2. B
    Chlorine dose
  3. C
    Media size and depth
  4. D
    Tank volume
Question 9Single Answer
Which design parameter is essential for disinfection efficiency?
  1. A
    Detention time and disinfectant concentration
  2. B
    Tank height
  3. C
    Pipe length
  4. D
    Sludge age
Question 10Single Answer
Which process removes hardness from water?
  1. A
    Aeration
  2. B
    Screening
  3. C
    Lime-soda process
  4. D
    Sedimentation
Question 11Single Answer
Which parameter determines sizing of aeration tanks?
  1. A
    Turbidity
  2. B
    Pipe diameter
  3. C
    Chlorine dose
  4. D
    MLSS concentration and F/M ratio
Question 12Single Answer
Which treatment removes pathogens most effectively?
  1. A
    Coagulation
  2. B
    Filtration only
  3. C
    Sedimentation
  4. D
    Disinfection
Question 13Single Answer
Which factor controls biological activity in activated sludge?
  1. A
    Light intensity
  2. B
    Dissolved oxygen concentration
  3. C
    Pipe slope
  4. D
    Tank color
Question 14Single Answer
Which unit process removes floating solids?
  1. A
    Skimming tank
  2. B
    Grit chamber
  3. C
    Aeration tank
  4. D
    Filter
Question 15Single Answer
Which parameter affects sludge digestion efficiency?
  1. A
    Flow velocity
  2. B
    Pipe diameter
  3. C
    Turbidity
  4. D
    Temperature and retention time
Question 16Single Answer
Which method is used for phosphorus removal?
  1. A
    Chemical precipitation
  2. B
    Screening
  3. C
    Aeration only
  4. D
    Filtration
Question 17Single Answer
Which factor influences sedimentation efficiency?
  1. A
    Pipe diameter
  2. B
    Chlorine dose
  3. C
    Surface overflow rate
  4. D
    Sludge age
Question 18Single Answer
Which parameter is key in designing grit chambers?
  1. A
    Temperature
  2. B
    pH
  3. C
    Chlorine demand
  4. D
    Flow velocity
Question 19Single Answer
Which treatment stage removes colloidal particles?
  1. A
    Coagulation-flocculation
  2. B
    Screening
  3. C
    Aeration
  4. D
    Disinfection
Question 20Single Answer
Which factor determines chlorine demand in water?
  1. A
    Organic matter and ammonia content
  2. B
    Pipe size
  3. C
    Tank depth
  4. D
    Flow velocity

Environmental Laws & Regulations

Question 21Single Answer
Which authority is empowered to grant Consent to Establish under the Water (Prevention and Control of Pollution) Act, 1974?
  1. A
    State Pollution Control Board
  2. B
    Central Government directly
  3. C
    District Magistrate
  4. D
    Ministry of Industry
Question 22Single Answer
Which provision of the Water Act defines the procedure for taking effluent samples for analysis?
  1. A
    Section 17
  2. B
    Section 33
  3. C
    Section 25
  4. D
    Section 21
Question 23Single Answer
Which condition is mandatory for a sample to be legally valid under the Water Act?
  1. A
    Sample taken in presence of occupier or representative
  2. B
    Sample taken without notice
  3. C
    Sample stored without sealing
  4. D
    Sample analyzed without documentation
Question 24Single Answer
Which term best defines “effluent” under the Water Act?
  1. A
    Gaseous discharge
  2. B
    Liquid waste discharged from premises
  3. C
    Solid waste only
  4. D
    Hazardous chemical only
Question 25Single Answer
Which action requires prior Consent to Establish under the Water Act?
  1. A
    Office renovation
  2. B
    Routine maintenance
  3. C
    Employee recruitment
  4. D
    Expansion of industrial plant
Question 26Single Answer
Which section of the Water Act deals with penalties for non-compliance?
  1. A
    Section 3
  2. B
    Section 17
  3. C
    Section 9
  4. D
    Section 41
Question 27Single Answer
Which body has the authority to inspect industrial premises under the Water Act?
  1. A
    Pollution Control Board officials
  2. B
    Local municipality
  3. C
    Private auditors
  4. D
    NGO representatives
Question 28Single Answer
Which function is performed by the Central Pollution Control Board?
  1. A
    Granting building permits
  2. B
    Issuing industrial licenses
  3. C
    Coordinating activities of State Boards
  4. D
    Tax collection
Question 29Single Answer
Which section empowers the Board to issue directions including closure of industry?
  1. A
    Section 25
  2. B
    Section 21
  3. C
    Section 33A
  4. D
    Section 17
Question 30Single Answer
Which requirement is necessary for Consent to Operate?
  1. A
    Only land ownership
  2. B
    Compliance with prescribed standards
  3. C
    Employee strength
  4. D
    Production capacity
Question 31Single Answer
Which act introduced the concept of Air Pollution Control Areas?
  1. A
    Water Act 1974
  2. B
    Forest Act
  3. C
    EPA 1986
  4. D
    Air Act 1981
Question 32Single Answer
Which authority declares Air Pollution Control Areas?
  1. A
    State Government
  2. B
    Central Government
  3. C
    CPCB
  4. D
    District Court
Question 33Single Answer
Which pollutant category is regulated under the Air Act?
  1. A
    Only gases
  2. B
    Only liquids
  3. C
    Gases, particulates, and noise
  4. D
    Only solids
Question 34Single Answer
Which provision allows inspection of air pollution sources?
  1. A
    Section 21
  2. B
    Section 24
  3. C
    Section 31A
  4. D
    Section 17
Question 35Single Answer
Which condition is necessary for emission compliance under the Air Act?
  1. A
    Random monitoring
  2. B
    No monitoring required
  3. C
    Self-certification only
  4. D
    Adherence to emission standards
Question 36Single Answer
Which authority sets emission standards under the Air Act?
  1. A
    Local body
  2. B
    Private agencies
  3. C
    Central Pollution Control Board
  4. D
    District administration
Question 37Single Answer
Which section empowers boards to issue directions under the Air Act?
  1. A
    Section 21
  2. B
    Section 31A
  3. C
    Section 24
  4. D
    Section 17
Question 38Single Answer
Which act addresses noise pollution control indirectly?
  1. A
    Air Act
  2. B
    Water Act
  3. C
    Forest Act
  4. D
    Wildlife Act
Question 39Single Answer
Which requirement is essential before establishing an industrial plant in an air pollution control area?
  1. A
    Approval from police
  2. B
    Permission from municipality
  3. C
    Consent from SPCB
  4. D
    Approval from court
Question 40Single Answer
Which act is known as the umbrella legislation for environmental protection?
  1. A
    Water Act
  2. B
    Air Act
  3. C
    Environment Protection Act 1986
  4. D
    Forest Act

Pollution & Control

Question 41Single Answer
Which of the following defines an ecosystem?
  1. A
    A group of similar organisms
  2. B
    The interaction between living organisms and their physical environment
  3. C
    A community of plants
  4. D
    A population of animals
Question 42Single Answer
What is biodiversity?
  1. A
    The number of individuals in a population
  2. B
    The variety of life in a particular habitat or ecosystem
  3. C
    The amount of rainfall in a region
  4. D
    The average temperature of an area
Question 43Single Answer
Which of the following is an abiotic factor?
  1. A
    Bacteria
  2. B
    Plants
  3. C
    Sunlight
  4. D
    Animals
Question 44Single Answer
Which of the following is a biotic factor?
  1. A
    Water
  2. B
    Soil
  3. C
    Fungi
  4. D
    Air
Question 45Single Answer
What is sustainable use of natural resources?
  1. A
    Using resources without considering future needs
  2. B
    Using resources in a way that meets current needs without compromising future availability
  3. C
    Exploiting resources for maximum profit
  4. D
    Ignoring resource depletion
Question 46Single Answer
Which of the following is an example of a natural resource?
  1. A
    Plastic
  2. B
    Steel
  3. C
    Coal
  4. D
    Synthetic fibers
Question 47Single Answer
What is the role of decomposers in an ecosystem?
  1. A
    To produce food
  2. B
    To consume living organisms
  3. C
    To break down dead organic matter
  4. D
    To provide shelter
Question 48Single Answer
Which level of the food chain do plants occupy?
  1. A
    Primary consumers
  2. B
    Secondary consumers
  3. C
    Producers
  4. D
    Decomposers
Question 49Single Answer
What is the significance of biodiversity?
  1. A
    It increases vulnerability to diseases
  2. B
    It provides ecosystem stability and resilience
  3. C
    It reduces the number of natural resources
  4. D
    It has no impact on the environment
Question 50Single Answer
What is the primary source of energy for most ecosystems?
  1. A
    Chemical energy
  2. B
    Geothermal energy
  3. C
    Solar energy
  4. D
    Nuclear energy
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