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Objective Questions

Latest IFFCO AGT Exam Question (Objective Questions), MCQ in English

Subjects : Agriculture, Analytical Ability, Test of Reasoning, Numerical Ability, General Awareness on Agriculture Scenario, National Economy, Panchayat Raj & Cooperative, Communication Skills

Question Bank IFFCO Agriculture Graduate Trainee Exam - English
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Agriculture

Question 1Single Answer
Which source of energy is classified as renewable energy?
  1. A
    Coal
  2. B
    Solar radiation
  3. C
    Petroleum
  4. D
    Natural gas
Question 2Single Answer
The major combustible component of biogas is which gas?
  1. A
    Carbon dioxide
  2. B
    Nitrogen
  3. C
    Hydrogen sulphide
  4. D
    Methane
Question 3Single Answer
Which process is mainly responsible for methane production in a biogas plant?
  1. A
    Aerobic oxidation
  2. B
    Nitrification
  3. C
    Photosynthesis
  4. D
    Anaerobic digestion
Question 4Single Answer
Which microorganism group plays the most important role during the final stage of biogas production?
  1. A
    Nitrifying bacteria
  2. B
    Cyanobacteria
  3. C
    Actinomycetes
  4. D
    Methanogens
Question 5Single Answer
The approximate methane content of normal biogas is generally within which range?
  1. A
    5–15%
  2. B
    50–70%
  3. C
    20–30%
  4. D
    85–95%
Question 6Single Answer
Which greenhouse gas is released in large quantities from flooded rice fields?
  1. A
    Ozone
  2. B
    Sulphur dioxide
  3. C
    Methane
  4. D
    Carbon monoxide
Question 7Single Answer
Global warming potential of greenhouse gases is commonly compared with which reference gas?
  1. A
    Methane
  2. B
    Carbon dioxide
  3. C
    Nitrous oxide
  4. D
    Ozone
Question 8Single Answer
Nitrous oxide emissions from agricultural soils are strongly associated with which process?
  1. A
    Photosynthesis
  2. B
    Nitrogen transformations
  3. C
    Phosphate fixation
  4. D
    Potassium adsorption
Question 9Single Answer
Which agricultural practice can contribute significantly to nitrous oxide emissions when used excessively?
  1. A
    Mulching
  2. B
    Drip irrigation
  3. C
    Nitrogen fertilizer application
  4. D
    Seed treatment
Question 10Single Answer
Which layer of the atmosphere contains the maximum concentration of ozone that protects Earth from ultraviolet radiation?
  1. A
    Stratosphere
  2. B
    Troposphere
  3. C
    Mesosphere
  4. D
    Thermosphere
Question 11Single Answer
The principal environmental function of the stratospheric ozone layer is to absorb which radiation?
  1. A
    Ultraviolet radiation
  2. B
    Microwave radiation
  3. C
    Infrared radiation
  4. D
    Radio waves
Question 12Single Answer
Which compounds were historically major contributors to stratospheric ozone depletion?
  1. A
    Phosphates
  2. B
    Carbonates
  3. C
    Silicates
  4. D
    Chlorofluorocarbons
Question 13Single Answer
Acid rain is mainly caused by atmospheric emissions of which pollutants?
  1. A
    Methane and ammonia
  2. B
    Carbon dioxide and argon
  3. C
    Oxygen and hydrogen
  4. D
    Sulphur dioxide and nitrogen oxides
Question 14Single Answer
Which term describes the variety of genes, species and ecosystems present in a region?
  1. A
    Biodiversity
  2. B
    Biomagnification
  3. C
    Bioaccumulation
  4. D
    Bioremediation
Question 15Single Answer
Conservation of plant genetic resources within their natural habitats is called what?
  1. A
    In situ conservation
  2. B
    Ex situ conservation
  3. C
    Cryopreservation
  4. D
    Seed certification
Question 16Single Answer
A seed gene bank is an example of which type of biodiversity conservation?
  1. A
    Ex situ conservation
  2. B
    In situ conservation
  3. C
    Natural selection
  4. D
    Ecological succession
Question 17Single Answer
Which ecological pyramid is always upright under normal ecosystem conditions?
  1. A
    Pyramid of numbers
  2. B
    Pyramid of energy
  3. C
    Pyramid of biomass
  4. D
    Pyramid of population density
Question 18Single Answer
Approximately how much energy is generally transferred from one trophic level to the next according to Lindeman's concept?
  1. A
    1%
  2. B
    75%
  3. C
    40%
  4. D
    10%
Question 19Single Answer
Organisms that manufacture organic matter from inorganic substances are classified as what?
  1. A
    Consumers
  2. B
    Decomposers
  3. C
    Producers
  4. D
    Detritivores
Question 20Single Answer
Which organisms occupy the first trophic level in a grazing food chain?
  1. A
    Green plants
  2. B
    Carnivores
  3. C
    Herbivores
  4. D
    Decomposers
Question 21Single Answer
The gradual increase of a persistent pollutant concentration at higher trophic levels is known as what?
  1. A
    Eutrophication
  2. B
    Mineralization
  3. C
    Ammonification
  4. D
    Biomagnification
Question 22Single Answer
Which pesticide is a classic example associated with biomagnification in food chains?
  1. A
    Copper sulphate
  2. B
    DDT
  3. C
    Bordeaux mixture
  4. D
    Sulphur dust
Question 23Single Answer
Excessive nutrient enrichment of water bodies leading to algal blooms is called what?
  1. A
    Salinization
  2. B
    Calcification
  3. C
    Desertification
  4. D
    Eutrophication
Question 24Single Answer
Which nutrients are most frequently involved in freshwater eutrophication?
  1. A
    Carbon and sulphur
  2. B
    Iron and zinc
  3. C
    Calcium and magnesium
  4. D
    Phosphorus and nitrogen
Question 25Single Answer
Biological oxygen demand primarily indicates what characteristic of water?
  1. A
    Salinity
  2. B
    Organic pollution load
  3. C
    Hardness
  4. D
    Turbidity caused only by clay
Question 26Single Answer
A high BOD value in water generally indicates what condition?
  1. A
    Low organic contamination
  2. B
    High dissolved oxygen stability
  3. C
    High organic contamination
  4. D
    Absence of microorganisms
Question 27Single Answer
Which process uses living organisms to remove or detoxify environmental pollutants?
  1. A
    Sedimentation
  2. B
    Calcination
  3. C
    Distillation
  4. D
    Bioremediation
Question 28Single Answer
The use of plants to extract or immobilize pollutants from contaminated soil is specifically called what?
  1. A
    Nitrification
  2. B
    Methanogenesis
  3. C
    Humification
  4. D
    Phytoremediation
Question 29Single Answer
Which energy conversion occurs in a photovoltaic cell?
  1. A
    Solar energy to electrical energy
  2. B
    Chemical energy to heat energy
  3. C
    Wind energy to chemical energy
  4. D
    Electrical energy to solar energy
Question 30Single Answer
Which device converts wind energy into electrical energy?
  1. A
    Solar collector
  2. B
    Gasifier chamber only
  3. C
    Anaerobic digester
  4. D
    Wind turbine
Question 31Single Answer
Energy obtained from organic materials of plant and animal origin is generally called what?
  1. A
    Geothermal energy
  2. B
    Biomass energy
  3. C
    Tidal energy
  4. D
    Nuclear energy
Question 32Single Answer
Which crop residue can commonly serve as feedstock for biomass energy production?
  1. A
    Gypsum
  2. B
    Rock phosphate
  3. C
    Rice husk
  4. D
    Limestone
Question 33Single Answer
Gasification of biomass mainly produces which combustible fuel mixture?
  1. A
    Oxygen gas
  2. B
    Producer gas
  3. C
    Nitrogen fertilizer
  4. D
    Water vapour only
Question 34Single Answer
Producer gas generated from biomass contains significant quantities of which combustible gases?
  1. A
    Carbon monoxide and hydrogen
  2. B
    Oxygen and chlorine
  3. C
    Nitrogen and argon
  4. D
    Carbon dioxide and sulphur dioxide only
Question 35Single Answer
Which biofuel is commonly manufactured by fermentation of sugar-rich materials?
  1. A
    Producer gas
  2. B
    Biodiesel
  3. C
    Biocoal
  4. D
    Bioethanol
Question 36Single Answer
Biodiesel is commonly produced from vegetable oils through which chemical process?
  1. A
    Hydrolysis of starch only
  2. B
    Nitrification
  3. C
    Transesterification
  4. D
    Carbonation
Question 37Single Answer
Which crop has historically been considered a potential non-edible oil source for biodiesel production in India?
  1. A
    Potato
  2. B
    Wheat
  3. C
    Jatropha
  4. D
    Sugar beet
Question 38Single Answer
Bagasse is an important biomass residue obtained from processing which crop?
  1. A
    Cotton
  2. B
    Mustard
  3. C
    Sugarcane
  4. D
    Groundnut
Question 39Single Answer
Cogeneration in a sugar factory commonly involves simultaneous production of which two forms of energy?
  1. A
    Chemical fertilizer and electricity
  2. B
    Wind and tidal energy
  3. C
    Solar and nuclear energy
  4. D
    Heat and electricity
Question 40Single Answer
Which ecological process describes the establishment and replacement of communities over time?
  1. A
    Mutation
  2. B
    Succession
  3. C
    Fixation
  4. D
    Translocation
Question 41Single Answer
Primary ecological succession begins on which type of site?
  1. A
    Previously cultivated fertile soil
  2. B
    Mature forest soil only
  3. C
    Substrate without an established biological community
  4. D
    Irrigated agricultural land only
Question 42Single Answer
Which community represents the relatively stable final stage of ecological succession?
  1. A
    Pioneer community
  2. B
    Climax community
  3. C
    Transitional community
  4. D
    Weed community
Question 43Single Answer
The zone where two ecosystems meet and interact is termed what?
  1. A
    Ecotone
  2. B
    Ecotype
  3. C
    Biome core
  4. D
    Pedon
Question 44Single Answer
Increased species diversity sometimes observed at the boundary between two communities is called what?
  1. A
    Bottleneck effect
  2. B
    Founder effect
  3. C
    Edge effect
  4. D
    Greenhouse effect
Question 45Single Answer
Which international agreement specifically addresses climate change and provides the framework for global climate negotiations?
  1. A
    Ramsar Convention only
  2. B
    CITES only
  3. C
    UNFCCC
  4. D
    International Seed Testing Association
Question 46Single Answer
The Kyoto Protocol primarily established mechanisms for reduction of which emissions?
  1. A
    Soil erosion
  2. B
    Greenhouse gas emissions
  3. C
    Groundwater recharge
  4. D
    Seed dormancy
Question 47Single Answer
Carbon sequestration in agricultural systems refers to what process?
  1. A
    Removing nitrogen from soil
  2. B
    Burning all crop residues
  3. C
    Increasing carbon storage in soil or biomass
  4. D
    Increasing soil salinity
Question 48Single Answer
Which agricultural practice can increase long-term soil organic carbon storage?
  1. A
    Addition of organic matter
  2. B
    Continuous residue removal
  3. C
    Intensive soil erosion
  4. D
    Burning farmyard manure
Question 49Single Answer
Conservation agriculture generally emphasizes minimum soil disturbance, crop diversification and what third major principle?
  1. A
    Continuous monocropping
  2. B
    Complete residue burning
  3. C
    Permanent soil cover
  4. D
    Deep puddling every season
Question 50Single Answer
Which environmental problem is commonly accelerated by overgrazing in arid regions?
  1. A
    Ocean acidification only
  2. B
    Glaciation
  3. C
    Volcanism
  4. D
    Desertification
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