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Latest Bihar SLET Environmental Science Exam Question (Objective Questions), MCQ in English

Subjects : Environmental Sciences

Question Bank Bihar SLET Environmental Science Exam - English
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Environmental Sciences

Question 1Single Answer
The grain size (USDA) of silt in soil ranges between :
  1. A
    0.2 mm to 0.5 mm
  2. B
    0.5 mm to 0.1 mm
  3. C
    0.1 mm to 0.05 mm
  4. D
    0.05 mm to 0.002 mm
Question 2Single Answer
What will be BOD, for a wastewater sample when 21 ml of sample is diluted to 300 ml in BOD bottle to determine dissolved oxygen .
[Given: Initial DO, = 10 mg/l; Five days later DO5 = 5 mg/l]
  1. A
    ~ 5 mg/l
  2. B
    ~ 25 mg/l
  3. C
    ~ 71.4 mg/l
  4. D
    ~75 mg/l
Question 3Single Answer
What will be the concentration of 40 ppb SO₂ in µg/m³ unit at 25°C ?
  1. A
    ~ 0.04 µg/m³
  2. B
    ~ 1047 µg/m³
  3. C
    ~ 104.7 µg/m³
  4. D
    ~ 10.47 µg/m³
Question 4Single Answer
National Ambient air quality standards typically include following components :
  1. A
    Maximum and Minimum pollutant levels, adjustment for co - pollutants
  2. B
    Abetment strategies, non - attainment penalties
  3. C
    Ambient temperature, size distribution and relative humidity
  4. D
    Indicator (Chemical/Chemical class), Averaging time, Pollutant form and level
Question 5Single Answer
Primary air pollutants differ from secondary air pollutants as they :
  1. A
    are present in levels that can be weighed on filter paper
  2. B
    are directly emitted from identified sources
  3. C
    have undergone chemical transformation in air after release from identified sources
  4. D
    are designated as hazardous air pollutants
Question 6Single Answer
Continuity equation expresses the law of conservation of :
  1. A
    Momentum
  2. B
    Mass
  3. C
    Entropy
  4. D
    Energy
Question 7Single Answer
Which of the following statements correctly represent the environmental wisdom worldwide ?
  1. A
    Our success depends on how well we manage the earth's life support systems mostly for our benefits
  2. B
    Our success depends on how well we manage the earth's life support systems for our benefit and for the rest of nature
  3. C
    Our success depends on learning how nature sustains itself and integrating such lessons from nature into the ways we think
  4. D
    Our success depends on using environmentally beneficial forms of economic growth and discourage environmentally harmful forms
Question 8Single Answer
Exposure concentration is _______ .
  1. A
    the amount of the chemical that is received by the target
  2. B
    the amount of chemical present in the medium with which an Organism has contact
  3. C
    the amount of the chemical that is excreted by the target
  4. D
    the amount of the chemical that is metabolized by the target
Question 9Single Answer
In ecotoxicology studies, ED - 50 is _______ .
  1. A
    the dose that affects 50% of the population or observed subjects
  2. B
    the dose that affects 95% of the population or observed subjects
  3. C
    the dose that affects 25% of the population or observed subjects
  4. D
    the dose that do not affect 50% of the total population
Question 10Single Answer
A hypothesis, that predicts a linear relationship in which rate of ecosystem processes is maximum with greatest number of species, is known as :
  1. A
    Rivet - popper hypothesis
  2. B
    Redundancy hypothesis
  3. C
    Diversity -  stability hypothesis
  4. D
    Idiosyncratic hypothesis
Question 11Single Answer
Which of the following is not a phase of secondary succession ?
  1. A
    Initiation
  2. B
    Continuation
  3. C
    Termination
  4. D
    Invasion
Question 12Single Answer
The Concept of r - and k - selection was originally given by :
  1. A
    MacArthur and Wilson (1967)
  2. B
    Grime (1979)
  3. C
    Molles (2008)
  4. D
    Mayr (1942)
Question 13Single Answer
The prefix "steno" and "eury” have been used for :
  1. A
    comparing the relative degree of tolerance of an organism to a given environmental factor
  2. B
    comparing the body size of organisms occurring in a given habitat
  3. C
    comparing the metabolic activity of organisms in a given habitat
  4. D
    comparing the distribution limits of organisms occurring across a biome
Question 14Single Answer
The strong and rapidly moving circumpolar upper air westerly circulation in a narrow belt of a few hundred kilometers width in the upper limit of the troposphere is called _______ .
  1. A
    Rossby waves
  2. B
    Jet streams
  3. C
    Walker streams
  4. D
    Hadley Circulation
Question 15Single Answer
Coriolis effect is :
  1. A
    the influence of Earth's rotation, which tends to turn air towards the right in the Northern Hemisphere
  2. B
    the influence of Earth's rotation, which tends to turn air upwards in the Northern Hemisphere
  3. C
    the influence of Earth's rotation, which tends to turn air towards the left in the Northern Hemisphere
  4. D
    the influence of Earth's rotation, which tends to turn air downwards in the Northern Hemisphere
Question 16Single Answer
The boundary between fresh and salty groundwater along shorelines is determined by  :
  1. A
    recharge and discharge in freshwater aquifer
  2. B
    composition of salty and fresh groundwater
  3. C
    rainfall
  4. D
    nature of aquifer
Question 17Single Answer
The sum of diffused and direct solar radiation, is called :
  1. A
    continental solar radiation
  2. B
    global solar radiation
  3. C
    total solar radiation
  4. D
    universal solar radiation
Question 18Single Answer
Which one of the following elements is used in making Photovoltaic Solar cell ?
  1. A
    Tungsten
  2. B
    Silver
  3. C
    Lead
  4. D
    Silicon
Question 19Single Answer
The destructive distillation of coal yielding products such as gasoline, diesel oil and other products, is known as
  1. A
    gasification
  2. B
    precipitation
  3. C
    condensation
  4. D
    liquefaction
Question 20Single Answer
Which process facilitates conversion of raw fat into biodiesel in the presence of alcohol ?
  1. A
    Glycerol conversion
  2. B
    Saccharification
  3. C
    Torrefaction
  4. D
    Transesterification
Question 21Single Answer
Which plant/tree has been recommended in India for extraction of biodiesel ?
  1. A
    Wheat (Triticum aestivum)
  2. B
    Sugarcane (Saccharum officinarum)
  3. C
    Mango (Mangifera indica)
  4. D
    Karanja (Pongamia pinnata)
Question 22Single Answer
Anammox bacteria is required for which of the following steps in wastewater treatment ?
  1. A
    Nitrate to Nitrite conversion
  2. B
    Nitrite to Nitrate conversion
  3. C
    Molecular Nitrogen to Ammonia conversion
  4. D
    Ammonium ion to Molecular Nitrogen conversion
Question 23Single Answer
Which of the following is an INCORRECT statement ?
  1. A
    Humus represents organic matter, dark in colour
  2. B
    Acid soils are devoid of basic cations
  3. C
    Humus contains cellulose and hemi cellulose
  4. D
    Humic and fulvic acids in humus form hydrophobic colloid whereas clay colloids are hydrophilic in nature
Question 24Single Answer
The use of bacteria and other microorganisms to breakdown hazardous waste into relatively harmless components, is termed as :
  1. A
    phyto remediation
  2. B
    source reduction process
  3. C
    integrated waste management
  4. D
    bioremediation
Question 25Single Answer
Which of the following is INCORRECT about the given decomposition reaction ?
  1. A
    All carbon in (1) is oxidized
  2. B
    Some Carbon in (1) is oxidized and some is reduced
  3. C
    This is an example of fermentation
  4. D
    It produces gas that some time catches fire
Question 26Single Answer
Heavy metals are retained in soil/sludge by :
  1. A
    complexation by humic substances in organic particles
  2. B
    absorption on to surface of mineral particles
  3. C
    precipitation reaction
  4. D
    solubilization in acidic conditions
Question 27Single Answer
There is often a formal review and licensing procedures of Environmental Impact Assessment. Who would NOT carry out such a procedure ?
  1. A
    The proponent of the development project
  2. B
    The local government authority ultimately responsible for licensing development project
  3. C
    Another government agency which can be given responsibility for licensing development project
  4. D
    An independent body having knowledge of the development project
Question 28Single Answer
As per United Nations Framework Convention on Climate Change (UNFCC), which of the following has role in the assessment and review of the effective implementation of the convention ?
  1. A
    Subsidiary Body for Scientific and Technical Advice (SBSTA)
  2. B
    Subsidiary Body for Implementation (SBI)
  3. C
    The Conference of Parties (COP)
  4. D
    The Climate Change Secretariat
Question 29Single Answer
"A financial mechanism through which developing countries would be rewarded for emission reduction achieved by taking action to reduce deforestation and forest degradation" refers to :
  1. A
    Clean Development Mechanism
  2. B
    Global Forest Carbon Mechanism
  3. C
    Reduced Emission from Deforestation and Forest Degradation
  4. D
    Incentive - Compatible Selection Mechanism
Question 30Single Answer
Which of the following principle was introduced in 1972 by the Organization for Economic Cooperation and Development (OECD) guiding principles concerning Institutional Economic Aspects of Environmental Pollution ?
  1. A
    Frontier Diplomacy Principle
  2. B
    Polluter Pays Principle
  3. C
    Human Rights and Environment Principle
  4. D
    Principle of Environment Protection
Question 31Single Answer
Which section of Environmental (Protection) Act, 1986 deals with offences by companies ?
  1. A
    Article 13
  2. B
    Article 14
  3. C
    Article 16
  4. D
    Article 18
Question 32Single Answer
Which Article of the Constitution of India states that it shall be the duty of every citizen of India to protect and improve the natural environment and to have compassion for living creatures ?
  1. A
    Article 48A
  2. B
    Article 51A
  3. C
    Article 21A
  4. D
    Article 13A
Question 33Single Answer
Which among the following is the first major Environmental Protection act to be promulgated in India ?
  1. A
    Biological Diversity Act
  2. B
    Environmental Protection Act
  3. C
    Forest Conservation Act
  4. D
    Wildlife Protection Act
Question 34Single Answer
Which of the following sections of the Indian Penal Code refers to making atmosphere noxious to health as a punishable offence ?
  1. A
    Section 275
  2. B
    Section 276
  3. C
    Section 277
  4. D
    Section 278
Question 35Single Answer
Which of the following is NOT included during Environmental Impact Assessment (EIA) ?
  1. A
    A detailed assessment of the planned project and selected alternative compared to the baseline conditions
  2. B
    Qualitative description measuring higher, medium and low impacts
  3. C
    Quantitative description measuring physical values of water withdrawal, sewage produced and pollutants released
  4. D
    All the data collection, analysis and developed plans summarized together in a well-structured and concise documents
Question 36Single Answer
To find out the degree of linear relationship between age and height of trees, the parameter to be estimated is :
  1. A
    Standard Error
  2. B
    Correlation coefficient
  3. C
    Median
  4. D
    Standard deviation
Question 37Single Answer
The Coefficient of Variation can be measured by :
  1. A
    (Mean/Standard deviation) × 100
  2. B
    (Median/Standard deviation) × 100
  3. C
    (Standard deviation/Mean) × 100
  4. D
    (Standard deviation/Median) × 100
Question 38Single Answer
Which of the following is a nominal variable ?
  1. A
    Level of rainfall (Mild, Moderate, Severe)
  2. B
    Blood group type (A, B, AB, O)
  3. C
    Height of a tree
  4. D
    Socio - economic status (Low, Middle, High)
Question 39Single Answer
'Hysteresis' is the best defined as :
  1. A
    A change occurring at a steady rate where rate is defined by the directions of change
  2. B
    A change occurring at a steady rate followed by sudden increased rate catastrophically
  3. C
    A change that occurs at steady rate and maintains so
  4. D
    A change that is sudden non - linear between two stable states without the prospect of reverse
Question 40Single Answer
Which one of the following is correctly matched pair ?
  1. A
    Biodiversity Conservation - Basel Convention
  2. B
    Global Warming - Montreal Protocol
  3. C
    Climate Change - Kyoto Protocol
  4. D
    Groundwater Pollution - Ramsar Convention
Question 41Single Answer
Who among the following received Noble Prize for peace and started the Green Belt Movement ?
  1. A
    Rajendra K. Pachauri
  2. B
    Wagai M. Matthai
  3. C
    Jim Bohlen
  4. D
    Gro Harlem Brundtland
Question 42Single Answer
Genetic Engineering is possible because :
  1. A
    Restriction endonucleases purified from bacteria can be used in vitro
  2. B
    The phenomenon of transduction in bacteria is well understood
  3. C
    We can cut DNA at specific sites by endonucleases like DNase
  4. D
    We can see DNA by electron microscope
Question 43Single Answer
LEED, one of the Sustainable Habitat green rating systems, refers to :
  1. A
    Leadership in Energy and Efficiency Design
  2. B
    Leadership in Energy and Efficiency Document
  3. C
    Leadership in Energy and Environment Design
  4. D
    Leadership in Energy and Environment Document
Question 44Single Answer
'Prerak Dauur Samman', the annual award given under which of the following scheme of Government of India ?
  1. A
    Smart Cities
  2. B
    Namami Gange
  3. C
    Swachh Bharat Abhiyan
  4. D
    Green India Mission
Question 45Single Answer
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R) :
Assertion (A) : Active ingredient in most pesticides are organic chlorine compounds .
Reason (R) : Organo chlorines have low solubility in water, high solubility in hydrocarbon like environment and have relatively high toxicity to insects and low toxicity to humans .
In light of the above statements, choose the correct answer from the options given below :
  1. A
    Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. B
    Both (A) and (R) are true, but (R) is NOT the correct explanation of (A)
  3. C
     (A) is true, but (R) is false
  4. D
    (A) is false, but (R) is true
Question 46Single Answer
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R) .
Assertion (A) : Temperature of large waterbody varies more slowly than that of the land of comparable size .
Reason (R) : Specific heat of water is high i.e., about five times of soil .
In light of the above statements, choose the correct answer from the options given below :
  1. A
    Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. B
    Both (A) and (R) are true, but (R) is NOT the correct explanation of (A)
  3. C
    (A) is true, but (R) is false
  4. D
    (A) is false, but (R) is true
Question 47Single Answer
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R) .
Assertion (A): Small increase in wind velocity and height of turbine produces a large increase in energy yield .
Reason (R) : Energy yield from wind is proportional to third power of wind speed and wind speed increases with height above ground .
In light of the above statements, choose the correct answer from the options given below :
  1. A
    Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. B
    Both (A) and (R) are true, but (R) is NOT the correct explanation of (A)
  3. C
    (A) is true, but (R) is false
  4. D
    (A) is false, but (R) is true
Question 48Single Answer
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R) .
Assertion (A) : a and ß particles, emitted during a radioactive decay of a nucleus are simply nucleus of Helium and electron and are called as ionizing radiations .
Reason (R) : a and ß particles produced in the radioactive decay are ejected with an incredible amount of energy of motion. When this energy is absorbed by matter encountered by the particle, it often ionises atoms and molecules .
In light of the above statements, choose the correct answer from the options given below :
  1. A
    Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. B
    Both (A) and (R) are true, but (R) is NOT the correct explanation of (A)
  3. C
    (A) is true, but (R) is false
  4. D
    (A) is false, but (R) is true
Question 49Single Answer
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R) .
Assertion (A): Cool pavements are generally composed of light coloured material with high permeability .
Reason (R) : Lighter coloured pavements reflect more light and absorb less heat. High permeability allow water to percolate and evaporate, thereby cooling pavement and surrounding air .
In light of the above statements, choose the correct answer from the options given below :
  1. A
    Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. B
    Both (A) and (R) are true, but (R) is NOT the correct explanation of (A)
  3. C
    (A) is true, but (R) is false
  4. D
    (A) is false, but (R) is true
Question 50Single Answer
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R) .
Assertion (A) : Dematerialization. the progressive decrease in size and weight of a product as a result of technological improvement is an example of source reduction .
Reason (R) : New product is more durable than the one being replaced .
In light of the above statements, choose the correct answer from the options given below :
  1. A
    Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. B
    Both (A) and (R) are true, but (R) is NOT the correct explanation of (A)
  3. C
    (A) is true, but (R) is false
  4. D
    (A) is false, but (R) is true
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