CUSAT CAT 2019 Question Paper Engineering Science

ENGINEERING SCIENCE

1. 019
Match the application to approximate numerical method.
2
Applications
S T Numerical Method
E
P1: Numerical Integration T M1: Newton-Raphson Method
N
O
S I
P2: Solution to a transcendental equation M2: Runge-Kutta Method

IS of linear equations
P3: Solution to a system
M
D
M
A to a differential equation
P4: Solution
M3: Simpson’s rule
M4: Gauss Elimination Method

N
(A) O P1-M3, P2-M2, P3-M4, P4-M1
(B)M P1-M3, P2-M1, P3,-M4, P4-M2

SAT
M
O E
CO (D) P1-M2, P2-M1, P3-M3, P4-M4
(C) P1-M4, P2-M1, P3-M3, P4-M2

C T
CU 2.
AT N
It is known that two roots of the non linear equation
The third root will be
19
are 1 and 3.

(A) j

S IO 2 0
U S T
(B)
S
C IS E
(C) 2
(D) 4 T
N
O
3.
M S I
In the trapezoidal rule for numerical integration of a function, the nature of

IS
D
approximation used for the function in each interval is

M
A D
(A) constant
(B)
(C)
linear
parabolicA
(D) cubic N
O
M
M
C O
AT
S
CU

4. Newton-Raphson formula to find the roots of an equation is given by

019
(A) 2
S T
E
T
(B)
N
O
SI
(C) IS
M
A
D
M
(D) N
O
M

SA T
5.
CO
If
M
O
C T Eand , then B is equal to

CU (A)

AT N 19
S IO 2 0
U S
(B)

ST
C IS
(C)

O
N
T E

(D)
M IS
S I
D M
A O
N
A
D

M
M
C O
AT
S
CU

019
6. The inverse of the matrix 2 is
S T
E
T
(A) N
O
SI
IS
M
(B) A
D
M
N
O
M

SAT
M
CO (C) O
C T E
CU (D)

AT N 19
S IO 2 0
7.
U S ST
If the variance of data is V, then its standard deviation is

(A)
C IS T E
N
O
M I
(B)
S
IS
D
(C)
M
A D
(D) V2
A
N
O
8. The following have the solution M
M
(A)
C O
(B)
AT
S
(C)
CU

(D) None of the above

019
2
S T
E
T
N
O
SI
IS
M
A
D
M
N
O
M

SAT
CO
M
O
C T E
CU
AT N 19
S IO 2 0
U
C IS S T E ST
N
O
M IS
S I
D M
A O
N
A
D

M
M
C O
AT
S
CU

019
2
9. The determinant of the matrix S T is
E
T
(A) 11
N
O
(B) SI
IS
M
M
(C) 0
D
(D) A

N
O
M

SAT
CO
M
O
C T E
CU 10.
T N
The rank of the matrix given below is

A 19
S IO
(A) 3
(B)
(C)
1
2 2 0
U S T
(D) 4
S
11.
C IS T E
Two trains A and B start from stations X and Y towards each other. B leaves station Y
N
half an hour after train A leaves station X. Two hours after train A has started, the
O
M IS
S I
D
distance between trains A and B is of the distance between stations X and Y. How
M
much time would it take each train (A and B) to cover the distance X to Y, if train A

A D
reaches half an hour later to its destination as compared to B?
A
(A)
N
8 hrs, 6 hrs
(B)
O
5 hrs, 4 hrs
(C)
(D)
10 hrs, 9 hrs
9 hrs, 8 hrs M
M
C O
12. The study of interactions between living organisms and environment is called as

AT
(A) Ecosystem
S
(B) Ecology
C
(C) PhytogeographyU

(D) Phytosociology

019
2
S T
E
T
N
O
SI
IS
M
A
D
M
N
O
M

SAT
CO
M
O
C T E
CU
AT N 19
S IO 2 0
U
C IS S T E ST
N
O
M IS
S I
D M
A O
N
A
D

M
M
C O
AT
S
CU

13. Fossil fuels and metallic minerals are

(A) Renewable resources 019
(B) Inexhaustible resources 2
(C) Non-renewable resources
S T
E
(D) None of the above
T
N
O
14. I
Extensive planting of trees to increase cover is called
S
IS
(A) Afforestation
M
D
M
(B) Agroforestation
A
(C) Deforestation

N forestry
(D) Social
O
M
15.

SA
T
O
M
Harnessing

O
C (A) Air pollution
C T
(B) Water pollution E
of nuclear energy often causes

CU
T
(C) Thermal pollution

N
(D) Noise pollution

16. A
S IO 2 0 19
Which of the following is a non-renewable resource?

(A)
(B)
(C)
(D)
U
C IS S
Coal
Forests
Water
Wildlife T E ST
N
O
17.
M S I
An ecosystem consists of
IS
(A)
D M
green plants and animals

A D
(B) green plants and decomposers
(C)
A
producers and consumers
(D)
N
green plants, animals decomposers and abiotic environment

O
18. Most stable ecosystem is M
M
(A)
(B)
Forest
Desert C O
(C)
(D)
Ocean
Mountain AT
S
CU

19. In a food chain animals constitute the

(A) First trophic level 019
(B) Second trophic level 2
(C) Intermediate trophic level
S T
E
(D) Ultimate trophic level
T
N
O
20. I
New approach to conservation is the establishment of
S
(A) SanctuariesI
S
Mreserves
D
M
(B) Biosphere
A parks
(C) National

N forests
(D) Reserve
O
M
21.

SA
T
O
M
O
C (A) Ozone and dust
(B) SO and NO
C T E
Acid rain is caused by increase in the atmospheric concentration of

T
2 2

CU
(C) SO and CO
3

N
(D) CO2 and CO

22. A
S IO
Fluoride pollution mainly affects
2 0 19
(A)
(B)
(C)
(D)
U S
Kidney

C IS
Brain
Heart
Teeth T E ST
N
O
23.
M S I
Which of the following on inhalation dissolves in the blood haemoglobin more rapidly
IS
D
than oxygen?
M
A D
(A) Sulphur dioxide
(B) Ozone
A
(C)
N
Carbon monoxide
(D)
O
Nitrous oxide

M
24. M by automobiles interact to form
Nitrogen oxide and hydrocarbons released

(A) Carbon monoxide C O
(B) Sulphur dioxide
A T
(C) PAN
S
(D) Aerosols
C U

25. Disease caused by eating fish inhabiting in mercury contaminated water is

(A) Bright’s disease 019
(B) Minimata disease 2
(C) Hashimoto disease
S T
E
(D) Osteosclerosis
T
N
O
26. I
Study of trends in human population growth and prediction of future growth is called
S
(A) Demography IS
M
D
M
(B) Biography
A
(C) Kalography

N
(D) Psychology
O
M
27.

SA
T
O
M
Dechlorination

O E
of water is achieved by adding
C (A) Sodium thiosulphate
C T
(B) Sodium sulphate

CU
T
(C) Sodium hexametaphosphate

N
(D) Sodium bisulphate

28. A
S IO 2 0 19
When the coefficient of rugosity is increased from 0.01 to 0.02, the gradient of a pipe of a

U S
given diameter to carry the same flow at the same velocity will be

ST
C IS E
(A) increased by 4 times

(B) increased by 2 times T
N
O
M I
(C) decreased by
S times

IS
D
(D) decreased by 4 times

M
29.
A
(A)
(B) O
N
A
D
Zero hardness of water is achieved by

Using lime soda process
Excess lime treatment
(C) Ion exchange method M
(D) Using excess alum dosage
M
C O
30.
T
Uniformity coefficient of filter sand is given by
A
(A) D50/D5 S
(B) D50/D10
CU

(C) D60/D5

19
(D) D60/D10
31. 0
Air-binding in rapid sand filters is encountered when
2
(A) T
there is excessive negative head
S
E
(B) the water is subjected to prolonged aeration
(C) T
the raw water contains dissolved gases
(D) N
the filter bed comprises largely of coarse sand
O
S I
32. Storage of water by ISimpounding is required where
M
(A) plenty
D
M
A of water is available in the stream in all seasons

N of suspended and dissolved matter are present in the water
(B) excess
(C) O there is a large variation in quantity of the river flow from time to time
M the flow is uniform throughout the year but is insufficient
O
(D)
M

SA
CO

C T E
T Which one of the following is the purpose of providing a surge tank in pipeline carrying
33.
water?

CU (A)
(B)

AT N
To store water
9
To increase the pressure throughout the pipeline
1
S IO 0
(C) To store overflowing water
(D)
2
To protect the pipeline against water hammer

34.
U
C IS S E ST
Water present in artesian aquifer is usually
T
(A)
N
at sub-atmospheric pressure
(B)
O
at atmospheric pressure
(C)
(D)
M IS
S I
at 0.5 times the atmospheric pressure
above the atmospheric pressure

D M
A D
35. If the methyl orange alkalinity of water equals or exceeds total hardness, all of the
hardness is A
N
(A)
O
non-carbonate hardness
(B) carbonate hardness
M
(C) pseudo hardness
M
(D)
O
negative non-carbonate hardness

C
36.
AT
A commonly used hand pump is the

(A) centrifugal pumpS
(B) reciprocating U
Cpump

(C) rotary pump

19
(D) axial flow pump
37. The pathogens can be killed by
20
(A) Nitrification
S T
E
(B) Lime-soda process
(C) Oxidation T
(D) Chlorination N
O
S I
38. IS levels are connected by two parallel pipes of diameter 2d and d.
M
Two reservoirs at different
The ratio of the
A
M
Dflows in the two pipes (larger: smaller) is

(A) N
O
M
O
(B)
M

SA T
CO (C)
(D)
C T E
CU
AT N 19
S IO
39. Which one of the following would contain water with the maximum amount of turbidity?

2 0
U
(A) Lakes

S T
(B) Ocean
S
C IS E
(C) Rivers
(D) Wells
T
N
O
M I
40. The ideal residual pressure at the farthest consumer’s tap in a properly designed water
S
IS
distribution system is in the range of

(A)
D M
0.06 to 0.20 N/mm2

A D
(B) 0.21 to 0.25 N/mm2
(C)
A
0.26 to 0.30 N/mm2
(D)
N
0.31 to 0.35 N/mm2
O
41. The yield of a well depend upon M
M
(A) Permeability of soil
(B) Area of aquifer opening C
O
into the wells
(C) Actual flow velocity T
(D) All of the above A
S
C U

019
2
S T
E
T
N
O
SI
IS
M
A
D
M
N
O
M

SAT
CO
M
O
C T E
CU
AT N 19
S IO 2 0
U
C IS S T E ST
N
O
M IS
S I
D M
A O
N
A
D

M
M
C O
AT
S
CU

42. Which of the following treatments reduce salinity of water?

1. Flash mixing and sedimentation 019
2. Electro dialysis 2
3. Reverse osmosis
S T
E
4. Freezing
5. Filtration T
N
O
I
Select correct answer using the codes given below:
S
(A) 1, 2, 3, 4 andIS5
(B) 2, 3 and 4M
(C) 1, 3 A D5
and
M
(D) 1,N2 and 4
O
M

SA
43.
O
A

O
Mriver is the source of water for water supply to a town. Its water is very turbid and
E
C polluted. The correct sequence of steps for treating the river water would be
C T
T (A) presedimentation -- prechlorination -- coagulation -- sedimentation -- nitration --
CU
T
post-chlorination

N
(B) coagulation -- sedimentation -- post-chlorination

A
S IO
(D) sedimentation -- post-chlorination
2 0
9
(C) coagulation -- filtration -- sedimentation -- post-chlorination
1
44.

U
C IS S E ST
Which of the following determinations are NOT necessary for raw water from a lake for
use as source of supply of water for boiler feed?
T
1. Turbidity 2.
N Bacterial count 3. Iron 4. Hardness

O
M I
Select correct answer using the codes given below:
S
IS
D
(A) 1, 2 and 3
(B) 1, 2 and 4
M
A D
(C) 1, 3 and 4
(D) 2, 3 and4
A
N
45. O
Which one of the following pairs is not correctly matched?
M
(A)
M
Check valve: To check water flow in all direction
(B)
(C) C O
Sluice valve: To control flow of water through pipe lines
Air valve: To release the accumulated air
(D) T
Scour valve: To remove silt in a pipe line
A
S
CU

46. Reciprocating pumps are suitable for

(A) high discharge and low heads 019
(B) low discharge and high heads 2
(C) low discharge and low heads
S T
E
(D) high discharge and high heads
T
N
O
47. I
Which one of the following filters will produce water of higher bacteriological quality?
S
IS
(A) Slow sand filter
M filter
D
M
(B) Rapid sand
(C) PressureA filter

(D) DualN media filter
O
M
48.

SA
T
O
M
C sand filter?
1.
O
C T
Air binding E
Which of the following are the common problems associated with the operation of rapid

CU
T
2 Cracking of sand beds

A N
3. Bumping of filter beds
4. Mud balls
19
S IO 2
Select correct answer using codes below 0
(A)
(B)
(C) U
C IS S
1 and 2
2 and 3
2, 3 and 4
T E ST
(D) 1, 2, 3 and 4
N
O
49.
M IS
S I
Consider the following valves in a water distribution system:

1.
D
check valve
M
A D
2. pressure reducing valve
3.
A
air relief valve
4. Scour valve
N
5.
O
Sluice valve

M
Which of the following work automatically?
M
(A)
(B)
1, 3 and 4
2, 4 and 5 C O
(C) 3, 4 and 5
AT
(D) 1, 2 and 3
S
CU

50. Two long pipes in parallel are used to carry water between two reservoirs. The diameter

19
of one pipe is twice that of the other. Both the pipes have the same value of friction
0
2
factor. Neglect minor losses. What is the ratio of flow rates through the two pipes?

(A) 2.8 S T
E
(B) 5.6
(C) 8 T
N
(D) 11.3 O
S I
IS
M
M
51. Which one of the following filters should be recommended for protected rural water
D
supply project?
A

N filter
O
(A) pressure
(B)M slow sand filter
M
O
(C) diatomaceous filter

CO
E
(D) rapid sand filter

A T
C T
S 52. Match list I (type of pipe) with list II (purpose)
CU
AT N a.
List I
Steel pipe
191.
List II
House plumbing

S IO 0
b. Cast iron pipe 2. Hot water carrying
c G.I.pipe 2 3. Distribution main

U S T
d. PVC pipe 4. Pumping main
S
C IS E
Codes:
T
(A) a-4, b-1, c-2, d-3
N
O
M I
(B) a-4, b-3, c-2, d-1
(C)
S
a-2, b-1, c-4, d-3
IS
D
(D) a-2, b-3, c-4, d-1
M
53.

(A)
(B)
A ECHO
O
N
A
D
Which one of the following organisms is responsible for enteric fever?

Salmonella typhi
(C) Entamoeba bistolytica M
(D) Echinococcus M
C O
AT
S
CU

54. Which one of the following statements is correct?

19
If the specific gravity of a suspended particle is increased from 2 to 3, the settling
0
velocity will, 2
(A) not change S T
E
(B) get doubled T
(C) N
get increased by 1-5 times
O
(D) I
get increased by 2.25 times
S
IS
M
M
55. Which one of the following is not a specific criterion for calculating surface overflow rate
D
A
in sedimentation tank design?

N
(A) Ototal quantity of water to be treated
M total surface area available in the tank
(B)

A T
S 56.
CO
(C)
(D)
O
M total length of the tank

C T E
total depth of the tank

CU
T
Pickup the treatment process that has maximum BOD removal efficiency

(A)

A N
Waste stabilization pond
19
S IO
(B) Mechanically aerated lagoons
(C) Pasveer Type Oxidation Ditch
2 0
U
(D) Conventional treatment using trickling filters

57.

(A)C IS S N
T E ST
Type II settling in water treatment is defined as

Settling of discrete particles in dilute suspensions
O
M I
(B) Settling of flocculent particles in dilute suspensions
(C) S
Settling of flocculent particles in concentrated suspensions
IS
D
(D) Settling of particles in the form of sludge blanket
M
58.
A A
D
Two identical centrifugal pumps are operated in parallel so as to deliver into a common

N
delivery pipe. Speed for both is also identical. At what total discharge (Q) and total head

O
(H) will the system operate as compared to discharge and head of each of the pump
operated singly?
M
(A) Both total Q and total H wouldM

C O
(B) Total Q would be approximately
increase, each approximately by 50%
doubled, but H would remain the same

A T but Q would be approximately halved
(C) Total H would be approximately doubled, but Q would remain the same
(D) Total H would be doubled,
S
C U

59. Which of the following is/are the characteristic(s) of coli form organism?

1. Bacillus 2. Gram-negative 013.9 Ferments lactose 4. Spore forming
2
(A) 1 alone
S T
E
(B) 1, 2 and 4
(C) 1, 2 and 3 T
(D) 2, 3 and 4 N
O
SI
60.
S
The effective size I(ES) of sand and its uniformity coefficient (UC) are usually specified
M
M
parameters forDsand filters. In slow sand filters as compared to rapid sand filters:
A

(A) ES Nis less but UC is more
(B) O ES is more but UC is less
(C)M Both ES and UC are more

A T
CO
M
O
C T E
(D) Both ES and UC are less

S 61. Circular sewers are economical up to a diameter
CU (A)
(B)

AT
1.5 m
2.0 m
N 19
S IO 0
(C) 2.5 m
(D) 3.0 m
2
62.
U
C IS S E ST
The permissible pH value for public water supplies may range between
T
(A) 5.5 to 8
N
(B) 5.5 to 6.0
O
(C)
(D)
M7 to 8.5
8.5 to 10.5
IS
S I
D M
A D
63. The units of velocity gradient (G) is
A
(A)
N
meter/sec
(B)
O
kilo Watt/meter
(C)
(D)
meter/hr
per second M
M
C O
AT
S
CU

64. Which of the following is not a method of disinfection?

(A) Ozonation 019
(B) U.V. radiation 2
(C) desalination
S T
E
(D) chlorination
T
N
O
65. I
A geological formation that may contain water but is incapable of transmitting significant
S
quantities is
IS
M
(A)
(B)
D
Aquitard
A
Aquifer
M
(C) N
Aquiclude
(D) O
Aquifuge
M

S
66.
AT
M
O E
COA mild steel pipe line 200 mm in diameter is carrying water with a velocity of 1.2 m/s. If
C T
friction factor is 0.02, the head loss per kilometer length of pipe line will be

CU (A)
(B)
(C) T
5.1 m

A
7.34 m
74.38 m
N 19
S IO 0
(D) 73.4 m
2
67.
U S ST
The head loss in a pipe of diameter d, carrying water at a flow rate Q is h. If this pipe is

C IS E
replaced by another pipe with diameter d/2, the increase in head loss will be
T
(A) 1600%
N
O
M
(B) 400%
(C) 800%
S I
IS
D
(D) 3200%

M
68.

(A)
(B)
A
A rising main is

O
N
A
D
pipe which carries water from overhead to different floors in a building
pipeline laid on rising gradient
(C)
M
pumping main which carries water from lower level to higher level
(D) All of the above
M
C O
AT
S
CU

69. Which of these is not a usual method of analysis of flow in water distribution networks?

(A) Hardy cross 019
(B) Newton-Raphson 2
(C) Linear theory
S T
E
(D) Linear programming
T
N
O
70. I
Self-purification of running streams may be due to
S
S
(A) coagulation,I flocculation and sedimentation
(B) dilution, M

M
D sedimentation and oxidation
A
(C) dilution, sedimentation and filtration

N sedimentation and coagulation
(D) dilution,
O
M
71.

SA
T
O
M
O E
The temperature of sewage affect the
C (A) biological activity
C T
(B) solubility of gases

CU
T
(C) viscosity of sewage

N
(D) All of the above

72. A
S IO 2
Under drainage system is provided in0 19
(A)
(B)
(C)
(D)
U
C IS S
Activate sludge process
Slow sand filters
Upflow filters
None of the above T E ST
N
O
73.
M S I
The multiplying factor usually adopted to obtain maximum hourly demand of water from
IS
D
the average hourly demand of water on the maximum day for the year is
M
A D
(A) 1.5
(B)
(C)
1.8
2.0 A
(D) 2.7 N
O
M
74.
M
Effluent of septic tank need to be treated with
(A) ASP
C O
(B)
(C)
soak pit
sewage system
AT
(D) S
oxidation pond

CU

75. The velocity of flow of water in a sedimentation tank is about

(A) 5-10 cm/sec 019
(B) 15-30 cm/sec 2
(C) 15-30 cm/min
S T
E
(D) 15-30 cm/hr.
T
N
O
76. I
The process of disalination of water, which makes use of microporous membrane is
S
IS
(A) Electro dialysis
M
D
M
(B) Solar distillation
A
(C) Freezing

N
(D) Defluoridation
O
M
77.

SA
T
OThe

O
M hoop stress, σ developed in a pipe of diameter ‘d’ and wall thickness ‘t’ due to
E
C internal pressure ‘p’ is given by
(A)  = pd/2t
C T
CU
T
(B)  = pt/2d

A N
(C) σ = pd/t
(D)  = pt/d
19
S IO 2 0
U S
78. Activated carbon is used for

ST
C IS E
(A) disinfection
(B) removing hardness
T
(C) removing odour
N
(D)
O
removing corrosiveness

M IS
S I
D
79. The cast iron water mains are
M
A D
(A) very much durable
(B)
A
capable of withstanding high pressures
(C)
N
liable to corrosion
(D)
O
cheaper

M
80. The characteristics of fresh and septicM
sewage respectively are

(A) alkaline and acidic C O
(B) acidic and alkaline T

(D) both alkaline S
(C) both acidic A
81.
CU of a pumping or rising main is the one which ensures
The economical diameter

(A) least cost of pipe

19
(B) least cost of pumping
(C)
(D) 20
least cost of pipe and pumping together
higher cost of pipe and least cost of pumping
S T
E
82. Dilution factor 50 means T
N
O
(A) 2% diluted sample
SI
(B)
(C) IS
1% diluted sample
4% diluted sample
M
(D) D
M
20% diluted sample
A

N
83. O
The economical diameter of a pipe, through which a discharge of 0.25 cumec is to be
M
O
passed is
M

SAT
CO (A) 0.5 m
(B) 0.75 m
(C) 1.0 m
C T E
CU
AT
(D) 1.2 m

N 19
S IO 0
84. Alum is a coagulant which is found to be most effective when range of pH value of water
is 2
(A)
U
C IS
(B)
(C) S
2 to 4
4 to 6
6.5 to 8.5 T E ST
(D) 8.5 to 10.5
N
O
85.
M IS
S I
The settling velocity of a spherical body, under laminar flow condition in water is given
by

D M
A
(A)
(B)
(C)
(D)
D
Lacey’s formula
A
Darcy’s law
N
Hazen William’s formula
O
Stoke’s law
M
M
C O
A T
S
86.
C U
Total hardness of drinking water, in general, should exceed

(A) 200 ppm

19
(B) 150 ppm
(C)
(D)
300 ppm
50 ppm 20
S T
The presence of excess amountEof nitrates in drinking water may cause a disease called

87.
T
(A) methemoglobinemia N
O
SIchildren
(B) fluorosis
(C) dental carriesSin
I
M
M
(D) poliomyelitis
D
A

88. N which is very effective for treating low pH water is
The coagulant,
O
M alum
O
(A)
M
O
E
(B) chlorinated copperas
C (C) copperas
SA T
C T
(D) sodium aluminate

CU 89.
AT N
The maximum permissible limit for fluoride in drinking water is

19
S IO
(A) 0.1 mg/l
(B) 1.5 mg/l
2 0
U S
(C) 5 mg/l
(D) 10 mg/l
ST
90.
C IS N
T E
Dissolved impurities in water consist of

O
M I
(A) silt
S
IS
(B) iron

D
(C) bacteria
(D) fungi
M
91. A N
A
D
The most common cause of acidity in water is

(A) O
hydrogen
(B) oxygen M
(C) carbon dioxide M
(D) nitrogen
C O
AT
92.
S
The method of analysis of water distribution system most suitable for long and narrow
pipes is
CU

(A) equivalent pipe method

19
(B) hardy cross method
(C)
(D)
circle method
dead-end method 20
S T
E
93. T
For plain sedimentation tanks, the detention time ranges form
N
O
(A) 1 to 2 hours
SI
(B)
(C) IS
2 to 2.5 hours
3 to 4 hours
M
(D) D
M
4 to 8 hours
A

N
94. O
A pipe which is installed in the house drainage to preserve the water seal of trap is called
M

SAT
M
O
(A) vent pipe
CO (B)
C T E
antisiphonage pipe
(C) waste pipe
(D) soil pipe

CU
95.

AT N 9
The presence of calcium chloride and magnesium chloride in water causes
1
(A)
S IO
colour
2 0
U
(B) turbidity

96.
(C)

C IS
(D)
S
hardness
coagulation

N
T E ST
A horizontal tunnel constructed at shallow depth along the bank of a river to interrupt the
O
M I
ground water table is called

IS
S
D
(A) infiltration gallery
(B) spring
M
A D
(C) canal
(D) channel A
N
O
97.
M
The chloride demand of a water sample was found to be 0.6 mg/litre. The amount of

M
bleaching powder containing 30% chloride to be added to treat 1 litre of such a water
sample is
C O
(A)
(B)
1.67 mg
1.50 mg
AT
(C) 2 mg S
(D) 1.75 mg
CU

019
2
S T
E
T
N
O
SI
IS
M
A
D
M
N
O
M

SAT
CO
M
O
C T E
CU
AT N 19
S IO 2 0
U
C IS S T E ST
N
O
M IS
S I
D M
A O
N
A
D

M
M
C O
AT
S
CU

98. Which of the following forms of chlorine has no disinfectant property?

(A) Hypochlorous acid 019
(B) Hypocholorite ion 2
(C) Monochloranine
S T
E
(D) Tricloramine
T
N
O
99. I
The suitable method for forecasting population for a large developed city is
S
S
(A) arithmeticalIincrease method
M increase method
D
M
(B) geometrical
A method
(C) comparative

N
(D) incremental increase method
O
M

SA
M
O
CO (A) stratosphere
T (B) mesosphere
C T E
100. Most of the weather phenomenon take place in the

CU
T
(C) troposphere

N
(D) ionosphere

101. A
S IO 2 0 19
The major quantity of rainfall in India is as

(A)
(B)
(C)
(D)
U S
convectional precipitation

C IS
orographic precipitation

T E ST
cyclonic frontal precipitation
cylonic non-frontal precipitation
N
O
102.
M S I
The percentage of total quantity of water in the world that of saline is about
IS
(A)
D 71%
M
A D
(B) 33%
(C) 67%
A
(D) 97%
N
O
103. M
Evaporation from the surface of a reservoir may be reduced by sprinkling
M
(A)
(B)
methane
spirit C O
(C)
(D)
acetyl alcohol
nitric acid AT
S
CU

104. The ‘starch-iodide’ test is performed to identify

(A) residual chlorine 019
(B) residual iodine 2
(C) residual starch
S T
E
(D) residual CO2
T
N
O
105. I
Copper sulphate is used to control _____________ in water
S
(A) algae IS
M
D
M
(B) bacteria
(C) silt A

(D) N
minerals
O
M

SA
M
CO (A) BOD O
C T
T (B) dissolving oxygen E
106. Chlorination of water does not remove

CU
T
(C) organic matter

N
(D) ammonia content

107. Sunlight A
S IO 2 0 19
(A)
(B)
(C)
(D)
U S
reduces turbidity

C IS
S
increases dissolved oxygen

T E
T
impedes the growth of algae
helps bacterial growth
N
O
108.
M S I
The device used to measure the odour of water is
IS
(A)
D M
Jackson’s turbidimeter

A D
(B) thermometer
(C) hydrometer
A
(D)
N
osmoscope

O
109. M
The ratio of the yield of a rapid sand filter and that of a slow sand filter is of the order of
M
(A)
(B)
15
30 C O
(C)
(D)
20
10 AT
S
CU

110. The commonly used material for water supply pipes, which has the property of being

19
strong, not easily corroded, long life but heavy and brittle is
0
(A) steel 2
(B) cast iron
S T
E
(C) copper
(D) T
reinforced cement concrete
N
O
SI the joint which is commonly used is
111. For asbestos cementSpipes
M
I
(A) flangedDjoint

M
A coupling or simplex joint
(B) ring-tite

N and socket joint
(C) spigot
(D) O
M screwed socket joint

SA
O
M
O E
112.C The water supply to a house being provided with the service connection pipe connected

C T
T with the municipal water mains. The service connection comprises:
CU
T
1) Stop-cock 2) Goose neck 3) Ferrule 4) Water meter

A N 9
The correct sequence of these connections is
1
(A)
S IO
1,2,3,4
2 0
U
(B) 3,1,2,4

113.
(C)

C IS
(D)
S
3,2,1,4
1,2,4,3

N
T E ST
A foot valve is provided at the end of suction pipe of a centrifugal pump to prevent
O
(A)
M S I
water from leaving and emptying the pump casing
IS
D
(B) back flow of lifted water into the pump
(C)
M
sudden and full loading of motor

A D
(D) entry debris and sand into the pump
A
N
114.
O
Turbidity is measured on

(A) standard cobalt scale M
(B) standard silica scale M
(C)
(D)
standard platinum scale
platinum cobalt scale C O
AT
S
CU

115. In disinfection which of the following forms of chlorine is most effective in killing the
pathogenic bacteria?
019
(A) Cl 2
(B) OCl
S T
E
(C) NH2Cl
(D) HOCl T
N
O
S I
IS are
116. Two primary air pollutants
M and ozone
(A) sulphurDoxide

M
A oxide and peroxyacetylnitrate
(B) nitrogen

N oxide and hydrocarbon
(C) sulphur
(D) O
M ozone and peroxyacetylnitrate

SA T
O
M
O
C T E
117.C Two biodegradable components of municipal solid waste are

(A) plastics and wood

CU
T
(B) cardboard and glass

A N
(C) leather and tin cans
(D) food wastes and garden trimmings
19
S IO 2 0
U S
118. A coastal city produces municipal solid waste (MSW) with high moisture content, high

ST
organic materials, low calorific value and low inorganic materials. The most effective

C IS E
and sustainable option for MSW management in the city is
T
(A) composting
N
O
M
(B) dumping sea
(C) incineration
S I
IS
D
(D) landfill

M
119.

A
(A)
(B) O
N
D
In the first stage of decomposition of organic matter is sewage, the product formed is
A
carbon dioxide
nitrates
(C) nitrites
M
(D) ammonia
M
C O
AT
S
CU

120. The hydraulic mean radius of a circular sewer of diameter D is given by

D
019
(A)
4 2
S T
E
D
(B)
2 T
N
O
(C)
D
SI
3
IS
M
D
M
(D) D
6 A

N
O
M
O
121. If the dissolved oxygen concentration in a natural drainage falls to zero, it indicates the
M
CO (A) recovery
E
zone of

SAT
C T
(B) active decomposition

CU
T
(C) degradation

A N
(D) reduction

19
122.
S IO
Air binding’ may occur in
2 0
(A)
(B)
(C) U
C IS S
Aerators

E
sludge digestion chambers
sewers
T
ST
(D) filters
N
O
123.
M IS
S I
The cross-section of a sewer for both the combined and separate system is

(A)
D circular
M
A D
(B) semi-elliptical
(C) egg-shape
A
(D)
N
horse-shoe shape
O
124. M
The dissolved oxygen sag curve shows

(A) dissolved oxygen deficit O
M
(B) BOD deficit C
T
(C) dissolved oxygen saturation
A
(D) BOD
S
C U

125. The total volume of a primary settling tank is 2500 cubic metres and the rate of sewage

19
flow is 24 x 106 litres/day. The detention time in the settling tank is
0
(A) 2.5 hours 2
(B) 2.4 hours
S T
E
(C) 1.25 hours
(D) 1.04 hours T
N
O
I
126. If the water contentSofSsludge is reduced from 98% to 97%, the volume of the sludge is
I
M
M
reduced by
D
A
(A) two-third

N
(B) half
O
(C) one-third
M
M
O
(D) one-fourth

SA
CO
C T E
T From among the following sewage treatment options, the largest land requirement for a
127.

T
given discharge will be for
CU (A)
(B)
A N
anaerobic pond
trickling filter
19
S IO 0
(C) oxidation ditch
(D) oxidation pond 2
128. U
C IS S E ST
The rainfall hyetograph shows the variation in the
T
(A)
N
cumulative depth of rainfall with time
O
M
(B) rainfall depth with area
(C)
S I
rainfall intensity with time

IS
D
(D) rainfall intensity with cumulative depth of rainfall

M
129.

A D
A catchment consists of 30% area with runoff coefficient 0.40 with the remaining 70%
A
are with runoff coefficient 0.60. The equivalent runoff coefficient will be

(A) 0.48 O
N
(B) 0.54 M
(C) 0.63
M
(D) 0.76
C O
AT
S
CU

130. For proper slow mixing in the flocculator of a water treatment plant, the temporal mean

19
velocity gradient, ‘G’ recommendable is the order of
0
(A) 5 to 10 s-1 2
(B) 20 to 80 s-1
S T
E
(C) 100 to 200 s-1
(D) 250 to 350 s-1 T
N
O
131. A circular sewer of S
M
I
SI 1 m carries storm water at a depth of 0.75 m. The hydraulic
diameter

M
radius is approximately
D
(A) 0.3 m A

(B) 0.4 Nm
O
(C) 0.5 m
M
M
O
(D) 0.6 m

SA
CO
C T E
T For fish habitat in a river, the minimum dissolved oxygen required is
132.

CU (A) 2 mg/L

AT
(B) 4 mg/L
(C) 8 mg/L
N 19
S IO 0
(D) 10 mg/L
2
133.
U S ST
The least expensive and most suitable excreta disposal unit for rural areas would be the

C IS
(A) soak pit
T E
(B) pit privy
N
O
M
(C) leaching cesspool
(D) septic tank
S I
IS
134.
D M
Fresh sludge has moisture content of 99% and, after thickening, its moisture content is

A
(A)
(B)
3%
5% O
D
reduced to 96%. The reduction in volume of sludge is

N
A
(C) 75%
M
(D) 97%
M
C O
AT
S
CU

135. A sewage sludge has a water content of 99%. The concentration of suspended solids in
the sludge is
019
(A) 10 mg/l 2
(B) 100 mg/l
S T
E
(C) 1000 mg/l
(D) 10,000 mg/l T
N
O
SI
136. Aerosol is
IS
M
(A)
(B)
D
M
carbon particles of microscopic size
A
dispersion of small solid or liquid particles in gaseous media

(C) N
finely divided particles of ash
(D) O
diffused liquid particles
M

S
137.
AT
M
should be
O E
COThe sound pressure level for a jet plane on the ground with sound pressure of 2000µ bar
C T
CU (A)
(B)
(C) T
60 decibel

A N
100 decibel
140 decibel
19
S IO 0
(D) 180 decibel
2
138.
U S ST
Which one of the following plume behaviours occurs when atmospheric inversion begins

C IS E
from the ground level and continues?
T
(A) Looping
N
O
M
(B) Fumigation
(C) Coning
S I
IS
D
(D) Fanning

M
139.

A D
Which one of the following pollutants or pairs of pollutants is formed due to
A
photochemical reactions?

(A) O
CO alone
N
(B) O3 and PAN M
(C) PAN and NH3
M
(D) NH3 and CO
C O
AT
S
CU

140. What type of noise can be abated by providing lining on walls and ceiling with sound
absorbing materials?
019
(A) Source noise 2
(B) Reflection noise
S T
E
(C) Structural noise
(D) Direct air-borne noise T
N
O
SI
141. The sewerage system
IS originates from
M
D
(A) house sewers
A sewer
(B) out fall
M
N sewers
(C) main
(D) O
M lateral sewers

SA T
O
M
O
C T
(A) contact beds E
142.C The treatment unit which works on putrefaction alone (i.e. anaerobic decomposition) is

CU
T
(B) septic tanks

A N
(C) oxidation ponds
(D) tricking filters
19
S IO 2 0
U S
143. When the temperature is more the dissolved oxygen contact (D.O.) of sewage gets

ST
C IS E
(A) reduced
(B) unaffected
T
(C) enhanced
N
(D)
O
enhanced and then reduced

M IS
S I
D
144. For a grit channel, if the recommended flow velocity is 0.25 m/s,and the detention period
M
is 1 minute, then the length of tank is

(A)
(B)
(C)
A 15 m
25 m
240 m
O
N
A
D
(D) 0.25 m
M
M
O
C is caused by
145. The secondary treatment of the sewage

(A) bacteria
A T
(B) algae
S
(C) coagulant
C U
(D) gravitational pull

146. Elutriation is a process of

(A) sludge digestion 019
(B) filtration 2
(C) sedimentation
S T
E
(D) washing digested sludge
T
N
O
147. I
“Symbiosis” the beneficial association between algae and bacteria is used for treatment of
S
waste water in the
IS
M
(A)
(B)
D
M
activated sludge process
A
rotating biological contactors

(C) N
anaerobic digester
(D) O
oxidation pond
M

S
148.
AT
M

(A)
O
1 – 2 hours E
COThe detention time in a septic tank is usually
C T
CU
T
(B) 5 – 6 hours

A N
(C) 18 – 24 hours
(D) 22 – 24 hours
19
S IO 2 0
U S
149. The type of valve which allows water to flow in one direction but prevents its flow in the
reverse direction is
ST
(A)
(B)
C IS
reflux valve
air relief valve
O
N
T E

M
(C) drain valve
(D) scour valve
S I
IS
150.
D M
The ventilation of sewers is needed to avoid the

(A)
(B)
(C)
A O
N
A
D
development of explosive mixtures of sewer gas
build up of odourous gas
danger of asphyxiation of sewer maintenance employees
(D)
M
aerobic decomposition of organic materials

M
C O
AT
S
CU

ENGINEERING SCIENCE 9 - ANSWER KEY
1
20 CODE: 607
TEST
QN. NO. KEY QN. NO. KEY QN. NO. T KEY QN. NO. KEY QN. NO. KEY
E S

1 B 26 A 51 T B 76 A 101 B
2 C 27 A N
O52 B 77 A 102 D

I
3 B 28 A
ISS 53 B 78 C 103 C
4 A 29 C M 54 B 79 A 104 A
5 B 30 D AD 55
M D 80 C 105 A

6 D 31 N
OA 56 C 81 C 106 B
7 A 32 MC 57 B 82 A 107 C
8
9
10
A
B
A
33
34 T C
SA
35
O
M D
D
B
O
C TE
59
60
58
C
A
B 83
84
85
C
D
A 108
109
110
D
B
B
11
12
C
B
U
C 36
37
B
D
AT N
61
62
C
C
86
87
1
C
9
A
111
112
B
C
13 C 38 C
S I O63 D 88
2 0 B 113 A

U S
14 A 39 C 64 C 89 B 114 B
15 C 40 C 65 C ST
90 B 115 D
16
17
A
D
41
42 C IS
A
B
66
67
B
D
O
N
T E 91
92
C
A
116
117
C
D
18 C 43 B
M 68
IS
C
S I 93 D 118 A

D
19 C 44 C 69 D 94 B 119 D
20 B 45 B 70 M B 95 C 120 A
21
22
23
B
D
C
46
47
48
A B
C
D
71
72
O
73
N
A
D D
B
A
96
97
98
A
C
D
121
122
123
B
D
C
M
24 C 49 D 74
MB 99 A 124 A

CO
25 B 50 B 75 C 100 C 125 A

AT
S
CU

019
2
QN. NO. KEY
S T
TE
126 C
127 D N
O
128 C SI
129 B IS
M
130 B A
D
M
131 A N
O
132 B M
133
134
135
D
C
D SA
T
CO
M
O
C TE
136
137
B
C
CU
AT N 19
138 D
S I O 2 0
U S
139 B
140 B ST
141
142
A
B C IS O
N
T E
143 A
M IS
S I
D
144 A
145 A M
146
147
148
D
D
D
A O
N
A
D

M
149 A
M
CO
150 C

AT
S
CU