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Previous Year Questions

TLS Online TPP Program

QUESTION ID:1

The innermost layer of the earth is made up of : 

QUESTION ID:2

The heat is distributed through a vertical mixing process called. :

QUESTION ID:3

Which of the following statement(s) is/ are true for an isothermal process ?

(a) There is no change in enthalpy

(b) There is no change in internal energy

(c) There is change in temperature

Choose the correct code

QUESTION ID:4

Match the List-l and List-II Identify the correct answer from the code given below :

    List-I                                                                        List-II

  (Aerosol)                                                                (Source)

(a) Primary natural aerosol                           (i)  Organic matter from biogenic gases

(b) Secondary natural aerosol                      (ii) Soot from biomass burning

(c) Primary anthropogenic aerosol              (iii) Sulphate aerosol from powerplant S02 emissions

(d) Secondary anthropogenic aerosol         (iv) Soil dust                     

Code:

(a) (b) (c) (d)

QUESTION ID:5

Which of llw following is not a heavy metal ?

QUESTION ID:6

The dominant dissolved carbon dioxide species in sea water is :

QUESTION ID:7

A solution of chemical 'A' having its 0.14 mol L-1 concentration has an absorbance of 0.42. Another solution of' A' under the same conditions has an absorbance of 0.36. What is the concentration of this solution of 'A' ?

QUESTION ID:8

Which one of the following is not a soil micronutrient

QUESTION ID:9

If life of NO2 be 0.693 day, its residence time is :

QUESTION ID:10

The general molecular formula of PAN type compound is :

QUESTION ID:11

Tn an ccosyslern, which one of the following is a micro-consumer

QUESTION ID:12

A structure with hundreds of species non-linearly interlinked for their livelyhood is called :

QUESTION ID:13

The process of examination of change in species diversity between ecosystem is a measure of :

QUESTION ID:14

Red tide is caused by :

QUESTION ID:15

The unidirectional series of changes from an uninhabited water body to u water body inhabited by a stable aquatic community are called 

QUESTION ID:16

Under the clear Sunny day, the maximum depth of the ocean at which photosynthesis can occur is :

QUESTION ID:17

The organism likely to be most similar to the first life form that evolved on the earth is :

QUESTION ID:18

A landform that results from free fall of rocks is called :

QUESTION ID:19

ln India lignite is mined in :

QUESTION ID:20

Tree height can be measured using remote sensing data from :

QUESTION ID:21

Ecosystem restoration deals with restoring :

QUESTION ID:22

A single solar cell (10 cm x 10 cm ) produces a voltage of 0.5 V and a current upto 2.5 A. If the solar insolation is 800 W / m2, the efficiency of the solar cell is :

QUESTION ID:23

Which of the following atoms is not fissile?

QUESTION ID:24

Which of the following fuels has minimum nitrogen content ?

QUESTION ID:25

Maximum sulfur content is found in which grade of coal ?

QUESTION ID:26

Which of the following solar cell materials has maximum efficiency ?

QUESTION ID:27

Noise level of 70 dB corresponds to sound intensity of :

QUESTION ID:28

At 250C and 1 atm. pressure, 1 ppm concentration of SO2 is equivalent to :

QUESTION ID:29

Given below are two statements. One labelled as Assertion (A) and the other labelled as Reason (R) :
Assertion (A) : Arsenic (Ill) is more toxic than arsenic (V).
Reason (R) : Arsenic (V) binds the sulfhydryl group more strongly than arsenic (III).
Choose the correct answer :

QUESTION ID:30

The half life period of a radioactive substance is 32 h. How much time it would take for its 75% disintegration ?

QUESTION ID:31

Match the List-I and List-II. Identify the correct answer from the code given below :

List-I                                                                                 List-II

(Pesticides)                                                                   (Target)

(a) Avicide                                                                     (I) Fish

(b) Disinfectant                                                            (II) Plants

(c) Herbicide                                                                (III) Birds

(d) Piscicide                                                                (IV) Micro-organisms

Code:

(a) (b) (c) (d)

QUESTION ID:32

Nitrogen fixation in nature is not accomplished by :

QUESTION ID:33

Which country has opted out of Paris Agreement on climate change?

QUESTION ID:34

Under the EIA notification of 14th September, 2006, preparation of EIA is not required for the projects falling in the :

QUESTION ID:35

Which type of projects usually require an EIA ?

QUESTION ID:36

Match the Lisl-I and List-II . Identify the correct answer from the code given below :

List-I                                                                                          List-II

(Series)                                                                      (Environmental labelling)

(a) ISO 14021                                                         (I) Principles and procedures

(b) ISO 14022                                                        (II) Self declaration of environmental claims

(c) ISO ·14023                                                       (III) Symbols

(d) ISO 14024                                                       (IV) Testing and verification methods

Code:

(a) (b) (c) (d)

QUESTION ID:37

Match the List-I and List-ll. Identify the correct answer from the code given below :

       List-I                                                                                                                    List-II

        (Acts)                                                                                                                (Year)

(a) Environmental Protection Act                                                                       (I) 1991

(b) Air (Prevention and Control of Pollution) Act                                             (II) 1977

(c) Water (Prevention and Control of Pollution) Act                                       (III) 1981

(d) Public Liability Insurance Act                                                                       (IV) 1986

Code :

(a) (b) (c) (d)

QUESTION ID:38

Articles 21, 48-A and 51-A(g), which aim to protect and improve the environment and safe guard forests and wildlife, incorporate which of the following principles of enviromental Law?

QUESTION ID:39

Which is the correct classification of forests under the Indian Forest Act, 1927 ?

QUESTION ID:40

Hardening of the steel releases the hazardous waste containing :

QUESTION ID:41

Red coloured containers in the hospitals are used to dump

QUESTION ID:42

Mercury pollution is considered hazardous lo human heallh because

QUESTION ID:43

In the con text of Gaussian Plume Dispersion model assumptions, consider the following statements :

The pollutants have the same density as the air surrounding them.

The atrnosphere is stabk.

QUESTION ID:44

Graphically d epkting a group of numerical data through their Quartile is :

QUESTION ID:45

rc out of 50 fish t>f a pond, "12 had no ectoparasite and remainin~ had va r y in~ numbers of parasites on them, then how many of fi sh had at least one parasite ?

QUESTION ID:46

In a One-way AI\OVA, explain.ed variance was found to be S.O and unexplained variance  was 3.67. The F-ra tio is :

QUESTION ID:47

In total global emissions of C02 , India's contribution js about:

QUESTION ID:48

Acconiing to lPCC, in order to restrict global mean temperature rise to 2''C by the year 2050, global ene rgy rcla tt:d C02 emissions (reference year 2003) need to be cut do·wn by tht~ year 2050 bv :

QUESTION ID:49

Global average wa ter consumption (L/ person/ day) is :

QUESTION ID:50

Jn a city, half a million cars travel approximately 20 km on a g iven day. The average T TC emission rate is 2.0 g per car km. Assuming that the average molecular weight of all the emilted HCs is equal to that of CH.1 , how much volume of HC is released in the city each day ?

QUESTION ID:51

Given below arc two statements. One labelled as Assertion (A) and the other labelled as
Reason (R) Assertion (A) : Vertical velocity often equals or exceeds hori1.ontal velocity in mesoscalemeteorolog......i cal sv.; stcms Reason (R) : Rising thermals are susceptible to undergo non-hydrostatic processes such as buoyant acceleration or acceleration through a narrow mountain pass.
Choose the correct answer :

QUESTION ID:52

Given below arc two statements. One labelled as Assertion (A) and the other labelled as
Reason (R):Assertion (A) : Geostrophic wind velocity is independent or latitude. Reason (R) : Geostrophic wind velocity is determined by pressure gradient force only.
Choose the correct answer :

QUESTION ID:53

Mixing height during night .is typically in the range

QUESTION ID:54

At a given urban location, the temperature at an elevation of 25 m above ground is 15 °C.I r the inversion comfit ions prevail and the environmental lapse rate is 1.25 °C per I 00 m, the temperature at an elevation of 200 m will be

QUESTION ID:55

When the temperature of the atmosphere falls at a rate greater than the dry adiabatic !<ipse rate, the atmosphere is

QUESTION ID:56

Gross Primary Productivity (GPP) of an ecosystem is

QUESTION ID:57

The oxygen atom species, which reacts with water to form hydroxyl radical, is produced by the photodissociation of

QUESTION ID:58

Match the List -  I and List - II given below

List - I                         List - II

(Element)                  (Classification)

Sodium                      Chalcogen

Calcium                    Alkali Metal  

Chromium                Alkaline Earth Element

Sulrur                      Transi tion Elernenl   

Choose the correct answer :

Codes:

a      b        c          d

QUESTION ID:59

Identify the incorrect statement about carbon isotopes :

QUESTION ID:60

Arnong the fo llowing insectici des, which one is relatively more soluble in water')

QUESTION ID:61

At 25 cc, hydrogen ion concentration in an environmental aqueous solution is found to be 5 x 10-4 mol 1.- t. This implies that the concentration or hydroxyl ions is

QUESTION ID:62

Identify the incorrect statement about humus.

QUESTION ID:63

Match the List - I and List - II. Identify the correct answer from the code:-; given below

List - I                                         List - II

(Terms)                                     (Chromatographic action) 

Effluent                                     The eluted solute

Eluate                                        The mobile phase

Eluent                                        The solute-mobile phase mixture which exits the column

(Chromatographic action)        The stream flowing out of the column

Codes:

a         b         c         d

QUESTION ID:64

A textile industrv effluent containing I x I 0 6 mol L 1 of an organic clvc has 0.6 absorbance in a cell or 1.0 em path len~th. The molar extinct ion coefficient or the dye is

QUESTION ID:65

Characteristics of successful invasive plant species are :

Rapid growth and early llowering.

High phenotypic plasticity

Product ion of lan.z...e number of seed:-;

Choose the correct answer

QUESTION ID:66

Drugs that prevent. the formation of bacterial cell wal I are

QUESTION ID:67

As a re:-;ult of El Nino, it ha:-; been observed that phytoplankton productivity in crea:-;e:-; in Eastern Indian Ocean around Indonesia and Gulf of Mexico. This increa:-;e is probably due to

Increased rainfall

More nutrient inflow

Turbulence in surface waters

Codes

QUESTION ID:68

Vcrmi composting process depends on
Quality of organic resources
T ypes o f earthworms
Moisture content of the organic wastes
Choose the correct answer

QUESTION ID:69

Photosynthesis in plants is associated with

A. decrease in entropy

B. increase in entropy

C. increase in Gibbs free energy

Choose the correct answer

QUESTION ID:70

The predominant biopart iculate al lergens in the air are

QUESTION ID:71

The enhancement of the fitness of a recipient evolutionary fitness or the donor individual isindividual bv acts that reduce the evolutionary fitness or the donor individual is

QUESTION ID:72

The greater proportion of the edges in a national park indicates a

less functional habitat

highly functional habitat

degaraded habitat

Choose the correct answer

QUESTION ID:73

The change in species composition thal is imposed by factors external Lo the biotic community is known as

QUESTION ID:74

Which ecosystem type produces maximum Iiller mass'?

QUESTION ID:75

Cyc lomorphism is a phenomenon observed in certain planktonic crustaceans and IS generally aUributed a:-; a respon:-;e to

changes in environmental variables of water.

ensure adaptive significance.

growth, reproduction and sudden genetic change

Codes:

QUESTION ID:76

Microbes in the environment arc likely to be

livin~ in biofilms on surfaces.

non-culturable

living solitary and planktonic lines

Choose the correct code

QUESTION ID:77

Which magma type contains the greatest amount or silica')

QUESTION ID:78

Match the List- I and List - II and choose the correct answer from the codes given below :

List- I                                           List- II

(Stratigraphic Unit)                 (Deposits)  

Bai ladi Ia Group                      Mn

Nallamalai Group                    Phosphorite

Udaipur Group                         Banded Iron Formation

Sansar Group                           Pb-Zn

Codes:

a   b    c d 

QUESTION ID:79

Which group of following factors determine the discharge of a stream ?

QUESTION ID:80

Which among the follm-ving zones has the highest erosion rate in the journey or a river?

QUESTION ID:81

In the decreasing order of hardness on Mob's scale, choose the correct sequence from the followinf,. !. :

QUESTION ID:82

Wind transport of materials entails the following processes

Saltation

Rcptation

Suspension

Creep

Choose the correct answer :

QUESTION ID:83

According to Darcy's lmv for ground water movement, velocity is proportional to

QUESTION ID:84

Which of the following types of coal has maximum ash content

QUESTION ID:85

Given below arc two statements. One labelled as Assertion (A) and the other labelled as Reason (R):Assertion (A) : The amount of energy available in a single fusion event is small compared 1o a fission event.
Reason (R) : Isotopes of hydrogen arc much lighter than uranium
Choose the correct answer

QUESTION ID:86

Given below arc two statements. One labelled as Assertion (A) and the other labelled as  Reason (R): Assertion (A) : The thermal efficiency of nuclear reactors is lower than that of fossil fuelled slearn plants.

Reason (R) : Temperature of water generating stream in a nuclear reactor has relatively lower values compared to fossil fuelled steam plants

Choose the correct answer :

QUESTION ID:87

Given below arc two statements. One labelled as Assertion (A) and the other labelled as Reason (R):  Assertion (A): Natural gas contributes less lo smog formation than gasoline.

Reason ('R) : Unburnl CH4 molecules are considerably less reactive with respect lo the free radical chemistrv for smog than the hvdrocarbon molecules with more than one C atom.
Choose the correct  answer :

QUESTION ID:88

Consider ocean waves of amplitude 2.0 m and wavelength 200 m. Assuming the gravity to be the only active rorce, the power available per metre perpendicular lo !he propagation of the wave is

QUESTION ID:89

A wind mill has cross~seelional area 25.0 nY~. The wind speed is 6.0 m/s. What will be the power generated by the wind mill in the Betz limit '?

QUESTION ID:90

Given below are two statements. One labelled as Assertion (A) and !he other labelled as Reason (R): Assertion (A) : The power output rrom an OTEC system installed at a tropical site is steaclv 

Reason (R) : At tropical sites, the ternperalures or warm surface water and cold water in the depth of ocean hardly vary from season to season.

Choose the correct answer

QUESTION ID:91

An electric power plan! based on solar energy uses collectors with concentntlors which can achieve ternperalure of about 700 cc to operate a heat engine to generate electricity. If the solar insolation is I kW/m2, how rnuch total collector area will be required 10 supply  on average I 0 MW of electricity ? (Take ambient air temperature to be 25 °C)

QUESTION ID:92

The polency factor or CHCI, is 6.1 X l o--> kg-day/mg. The concentration in drinking waler  thai would result in 2 X I o-6 risk for a 70-k~ man. who drinks 2L/dav ihrou~hout or his life, is

QUESTION ID:93

\Which of the following  prepared in situ ?

QUESTION ID:94

ldenlify !he incorrect slalement from !he following regarding soil pollulion by heavy metals

QUESTION ID:95

A poinl source of noise produces a sound of 60 dB at a distance of I 0 m from iL If !he sound is measured at a distance of 40 m, what will be its value ?

QUESTION ID:96

ldenlify the incorrect stalement with regard 10 waler purificalion by coagulation.

QUESTION ID:97

In relation to drinking water source without conventional treatment but after disinfection water parameters and !heir permissible values are given in !he !isis given below  Match the List- I and List- II. Iclcntifv the correct answer from the codes given below :

List - I                                                   List - II

(Water parameters                           Permissible values

Total coliform organism MPN          6.5- 8.5

per l 00 ml                                          < 50 per I 00 mL 

ph                                                        2 m~/L or less

DO                                                        6 mg/L or more

BOD (5 days, 20 °C)

Codes:

a   b    c    d

QUESTION ID:98

Given below arc two statements. One labelled as Assertion (A) and the other labelled as Reason (R) : Assertion (A) : Ozone depletion is much Jess over arctic stratosphere than over Antarctic stratosphere.

Reason (R) : Antarctic atmosphere is on an average about I 0 cc cooler than the arctic stratosphere.

Choose the correct answer :

QUESTION ID:99

Match the List ·- I and List - II . ldentify the correct answer from the codes given  below

List - I                                         IList - II

(Water type)                            Conductivity (]lS cm-1              

Fresh water                             > 500

Clean tap water                     > 300

Clean up and river                  60 - 1()()

0rganically  enriched river       2 - 4

ICodes:

a b c d

QUESTION ID:100

Match the List - I and List - II. Idcntifv the correct answer from the codes given below

List - l                                                 List - II

(Auditing ty pes)                              (Set of terms} 

lmplementat ion audi 1                 External rev iew or the procedures used   

Performance audit                        Compare actual with predicted impacts

Project impact audit                      To cover ful I operation

Procedures audit                            To cover a start-up

Codes:

a   b    c    d

QUESTION ID:101

Given below arc two statements. One labelled as Assertion (A) and the ot her la belled as
Reason (R) : Assertion (A) : The ecological restoration is a difficu lt proposition both in principle and in practice. Reason ('R) : Identity and population sizes or plants and animals once present at aparticular site arc largely unknown.
Choose the correct answer :

QUESTION ID:102

During the ElA process under the ElA notification of September 14, 2006, no public hearing is required for
all A' category projects
all · B 1' catc gory projects
all 'B2' category projects
Choose the correct code :

QUESTION ID:103

Given below are two statements. One labelled as Assertion (A) and the other labelled as
Reason (R) Assert ion (A) : Evaporation of surface water is reduced due to black carbon in atmosphere Reason (R): Presence or aerosols having black carbon is responsible for dimming effect.
Choose the correct answer :

QUESTION ID:104

Match the List - I and List - II. Identify the correct answer from the codes given below:
List - I                                          List- ii
(Methods                                   (Description)
Network Method                     Possible impacts by composite environmental parameters.  
Overlays Method                     Structured approaches by involving scaling-weighing techniques.
Checklists Method                   Environmental systems as a complex web of relationships.
Adhoc Method                          Spatial distribution of environmental impacts using GIS.
Codes
(a)    (b)        (c)        (d)

QUESTION ID:105

In environmental Impact Assessment, the baseline studies describe the

QUESTION ID:106

An ecosystem restoration project should have the outcomes which are

Specific

Measurable

General

Realistic

Time bound

Choose the correct code :

QUESTION ID:107

When applied to field populations, Lotka-Volterra equations suffer from the following :
Competition coefficients arc assumed to be constant.
Carrying capacity is assumed to be constant.
There arc no time lags.
Maximal rate or increase is assumed to be constant.
Choose the correct answer

QUESTION ID:108

In a city, the daily per capita inhalation (m~) values of contaminated air over a period of 5 days are 6.~, 6.3, 6.2, 6.4 and 5.8, respectively. The sample mean with standard deviation of the data is

QUESTION ID:109

The population (N) or fish in a pond follows the logistic equation
dN , dt = 0.1 N - 0.00 I N
What is the maximum sustainable yield?

QUESTION ID:110

Given below arc two statements. One labelled as Assertion (A) and the other labelled as
Reason (R):Assertion (A) : For power stations and polluting industries, tall stacks arc installed. Reason (R} : The maximum ground level concentration of a pollutant released from a stack is inversely proportion to the height or the stack.
Choose the correct answer :

QUESTION ID:111

Consider a box model for an airshcd over a citv and assume that the initial concentration • of a pollutant is zero and that the air enteriiH! the box is clean. If the len~th of the box is I 0 ~ ~
km and the wind speed along the length of the box is 5 m/s, what is the time taken for the pollutant concentration to reach- 95tYr, of its final value')

QUESTION ID:112

For a sarnple size n = 16, the mean (X) value and standard deviation (S) are found to be 5.667 and 0.934, respectively. If the population mean is ~l = 5.2, then 1- statistic is

QUESTION ID:113

Which of the following are sources of the greenhouse gas methane (CH4)

Coal minin~ areas ~

Rurninants

l.ow land paddy

Wetlands

Choose the correct answer :

QUESTION ID:114

Which of the following convention/protocols/treaties is legally binding on the signatory countries ?

QUESTION ID:115

For untreated municipal wastewater, BOD/COD ratio is in the range

QUESTION ID:116

Organic wetland soils have

High porosity

Low density

High Ion exchange capacity

Low nutrient availability

QUESTION ID:117

Consider following statements about the ozone hole?

Ozone formation and destruction keeps on happening.

Ozone destruction rate is higher than its formation rate.

Ozone destruction rate is equal to its formation rate.

Choose the correct answer

QUESTION ID:118

Consider following statements about an estuary :
Estuar.v.. is the ecotonal reg'-· ion between fresh water and oceanic water.
This area is highly productive.
This area is highly unproductive.
Choose the correct answer

QUESTION ID:119

The ionic species, o+, 0 2+ and N:/ arc found generally in

QUESTION ID:120

As part or recently signed international agreement on phasing out hyclrofluorocarbons (I-IFCs), India will start phasing them out from the year

QUESTION ID:121

In the tropospheric ozone formation reaction sequence, which of the following chemical species does not act as a catalyst ')

QUESTION ID:122

Which of the following arc useful indicators of pollution potential of organic effluents '1
Total Organic Carbon (TOC)
 Biological Oxygen Demand (BOD)
(Turbidity
Conductivity
Choose the correct code :

QUESTION ID:123

Which or the following power plant:-; re lea:-;e:-; radioactive material:-; as well a:-; hazardous metals such as lead and arsenic under normal operating conditions ?

QUESTION ID:124

Match the List-1 and List-11. ldentifv the correct answer from the code:-; !liven below :

List - I                                      List - II

(Convention)                          (Purpose)

Paris Convention 1992          Transboundary Movement of Waste

Vienna Convention 1985        Protection of Marine Environment

Bamako Convention 1998      Protection of ozone layer

Basel convention 1992           Ban on import of hazardous waste to Africa

Codes;

(a)    (b)      (c)    (d)

QUESTION ID:125

Match the List-1 and List-11. ldentifv the correct answer from the codes !liven below :

   List - I                                   List - II

(Colour Codes                        (Hospital Wastes)

Yellow Bags                           Infected metal sharps

Red Bags                                Outdated Medicine bottles

Blue Bags                                Used Catheters

Black Carboy                           Infectious waste placenta

Codes 

(a)    (b)    (c)     (d)