B TAMIL NADU AGRICULTURAL UNIVERSITY B.Sc. (Hort) Degree Programme Mid Semester Examination, October 2018

Year          : III

(2015 Syllabus)

Time : 1 hr

Semester : V

Max. Marks: 20

Model Question Paper

PART-A                                (Answer All questions)

[ 20 x 0.5 = 10 ]

Choose the correct answer

[ 8 x 0.5 = 4 ]

1.

Which species of chromium is toxic in water

A)

Cr 2+

B)

Cr3+

C)

Cr 6+

D)

Cr 4+

2.

Which statement is False with reference to functions of constructed wet land technology

A)

Effective for controlling non-point source pollution

B)

Provide habitat for wild life

C)

Effluent can be directly used without any pre-treatment

D)

can restore water quality of rivers

3.

Alteration of microbial diversity in the soil is caused due to

A)

Illegal dumping of untreated waste

B)

Land filling of treated waste

C)

Resource recovery

D)

Incineration

4.

Mercury contamination related  disaster

A)

White baby syndrome

B)

Minamata disease

C)

Cholera

D)

Blue Baby Syndrome

5.

The minimum temperature for Incineration (minimum holding time of 2 seconds) .

A)

850oC

B)

800oC

C)

400oC

D)

Difficult to  determine

6.

Consider the following statements: i) Around 52 mango fruit processing units are established in Chittoor district of AP ii)  Mango seeds kernel contains higher pectin content than peel. iii) Mango peel had about 12.8% pectin content iv) Fresh fruits unsuitable for human consumption is called cull fruits.

A)

i , ii, iii and iv are correct

B)

i,ii and iii are correct

C)

I and iii are correct

D)

i,iii and iv are correct

7.

Source of potassium in grape wine processing  industrial effluent is from

A)

Cleaning agents

B)

Fermentation  process

C)

Fruits

D)

Disinfectants

8.

Papaya seeds are good commercial source of

A)

Pectin

B)

Carbohydrates

C)

Vitamin B12

D)

Lipids

Fill in the blanks with correct answer                                        [ 8 x 0.5 = 4]

9.

_______________ is the most common gas in the land fills

A)

Nitrous oxide

B)

Carbon-dioxide

C)

Methane

D)

Sulphur dioxide

10.

The aquatic weed  most suitable for  construction of wetland technology

A)

Typha

B)

Water lettuce

C)

Hydrilla

D)

Curry leaf pond weed

11.

According to TNPCB (standards of effluent for irrigation) maximum permissible limit for Biological demand (BOD, 3 days at 27 0C) should not exceed

A)

30 ppm

B)

300 ppm

C)

100 ppm

D)

Should be free from any BOD

12.

Minamata disaster is related to  --------------- poisoning

A)

Cadmium

B)

Mercury

C)

Zinc

D)

Copper

13.

In mango processing about ----------------of raw fruits  is emitted as byproduct / waste

A)

10%

B)

No waste

C)

50%

D)

20%

14.

In grape processing ______ per cent of initial raw material is released as waste

A)

10

B)

No waste

C)

50

D)

20

15.

Peel, kernel  and fibres are the by-product of  ____________ processing industries

A)

Mango

B)

Grapes

C)

Papaya

D)

Banana

16.

Pomace/marc, seeds are bye product of  ------------------processing Industries

A)

Mango

B)

Grapes

C)

Papaya

D)

Banana

17.

Match the following                                                                             [ 1 x 2 = 2 ]

a) Land filling

-

i) Recycling

b) Composting

-

ii) Resource recovery

c) Incineration

-

iii) Traditional method

d) Source separation

-

iv) Disposal

A)

a - iii, b - i, c - iv, d - ii

B)

a - i, b - ii ,c - iv, d – iii

C)

a - ii, b - i, c - iii ,d - iv

D)

a - iv, b - iii ,c - i ,d – ii

PART – B                                            (Answer All questions)                       [ 20 x 0.5 = 10 ]

Answer the questions based on the below pictures(18 – 21)     [4 x 0.5 = 2] Some of the waste producing horticultural industries are given below a.    Sago        b. Rubber        c. Cocoa     d. Coffee

18.

Identify the horticultural industries waste that are rich in  lignin

A)

A

B)

B

C)

C

D)

D

19.

Identify the waste that are rich in cyanide

A)

A

B)

B

C)

C

D)

D

20.

Identify the waste that are rich in pectin

A)

A

B)

B

C)

C

D)

D

21.

Identify the waste with unreacted processing chemicals

A)

A

B)

B

C)

C

D)

D

Answer the questions (22 – 25)                                                 [ 4 x 0.5 = 2 ] Composting can destroy pathogens or unwanted seeds. Unwanted living plants (or weeds) can be discouraged by covering with mulch/compost.

22.

The "microbial pesticides" (killing of pathogen) during composting may include

A)

Bt toxins

B)

Fungi

C)

Bacteria

D)

Earthworms

23.

Bacterial decomposition of biological material under aerobic decomposition

A)

Fermentation

B)

Fertilization

C)

Contamination

D)

Composting

24.

For rapid composting of organic waste

A)

It should be composted  in pits

B)

C:N ratio should be narrowed to 30:1

C)

C:N ratio should be narrowed to less than 10:1

D)

C:N ratio should not be altered

25.

The organisms responsible for most of the decomposition and heat generation in rapid composting

A)

Actinomycetes

B)

Mushrooms

C)

Fungi

D)

Bacteria

Read the following passage and answer the questions (26 – 29) [4 x 0.5 = 2]   Similarly to natural wetlands, constructed wetlands also act as a biofilter and/or can remove a range of pollutants  (such as organic matter, nutrients, pathogens, heavy metals) from the water.

26.

Most particulate organic nitrogen in constructed wetlands is removed by the process

A)

Sedimentation

B)

Denitrification

C)

Respiration

D)

Multiplication

27.

In wetland soils phosphorus is arrested by the mechanism  of

A)

Gasification

B)

Precipitation

C)

Solubilisation

D)

Algal growth

28.

One of the disadvantage of using constructed wetland technology

A)

Short hydraulic retention time

B)

Larger area requirement

C)

System are complex to construct

D)

High maintenance cost

29.

Locally grown non-predatory fish can be added to surface flow constructed wetlands to eliminate or reduce pests like

A)

Mosquitoes

B)

Aphids

C)

Dragon fly

D)

Mud insects

Answer the questions (30 – 33)                                                    [ 4 x 0.5 = 2 ]

30.

Eutrophication in water bodies is due to the concentration of nutrients in the effluents

a)

Nitrates and chlorides

b)

Nitrates and phosphates

c)

Nitrates and sulfates

d)

Chlorides and sulphates

31.

·         Nitrates  above 25 mg/lit  will cause the condition called

a)

Minamata disease

b)

Itai itai disease

c)

Blue baby syndrome

d)

Diabetes

32.

Stagnation of waste water will spread one of the following disease

a)

Cholera

b)

Tuberculosis

c)

Dengue

d)

SARS

33.

The waste management method reduces the municipal solid waste by about 90% by volume and 75% by weight.

a)

Land filling

b)

Incineration

c)

Biomethanation

d)

Pyrolysis

Read the following passage and answer the questions (34 – 37) [ 4 x 0.5 = 2 ]        Anaerobic digestion is a collection of processes by which microorganisms break down biodegradable material in the absence of oxygen.[1] The process is used for industrial or domestic purposes to manage waste or to produce fuels. Much of the fermentation used industrially to produce food and drink products, as well as home fermentation, uses anaerobic digestion

34.

In UASB technology of anaerobic treatment UASB stands for

A)

Upflow anaerobic sludge blanket

B)

United aerobic sludge breeder reactor

C)

United aerobic sludge blanket

D)

Union of Anaerobic separate bioreactor

35.

Bulking of sewage is frequently associated with-----------

A)

High C:P ratio

B)

High C:N ratio

C)

High dissolved oxygen

D)

All of the above

36.

Hospital waste has to be disposed off by ----------------

A)

Handing over to hazardous waste management site

B)

Burring 3m below the ground

C)

Burring 10m below the ground

D)

Incineration

37.

Retention time of the liquid in septic tank method of anaerobic treatment is in the order of ---------------

A)

One day

B)

Five days

C)

Ten days

D)

Life time