Legal Metrology • 2018 • Civil Engineering Paper-II
The rain fall on five successive days were measured as 100mm,80mm,60mm,40mm and 20mm respectively. If the infiltration index or the storm loss rate for the catchment area is earlier estimated as 50mm/day, the total surface run off will be
A)
50mm
B)
70mm
C)
90mm
D)
120mm
Correct option B: 70mm.
Legal Metrology • 2018 • Civil Engineering Paper-II
MPN index is a measure of one of the following
A)
BOD
B)
Coliform bacteria
C)
Dissolved oxygen content
D)
Hardness
The correct choice is B (Coliform bacteria), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-II
Aeration of water is done to remove
A)
Suspended impurities
B)
Colour
C)
Dissolve
The correct choice is B (Colour), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-II
Chlorine is sometimes used in sewage treatment to
A)
Avoid flocculation
B)
Avoid bulking of activated sludge
C)
Helps in grease separation
D)
Increase biological activity of bacteria
Correct option B: Avoid bulking of activated sludge.
Legal Metrology • 2018 • Civil Engineering Paper-II
For steady incompressible flow through a closed-conduit of uniform cross-section, the direction of flow will always be:
A)
from higher to lower elevation
B)
from higher to lower pressure
C)
from higher to lower velocity
D)
from higher to lower piezometric head
The correct choice is D (from higher to lower piezometric head), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-II
In steady flow of a fluid,the total acceleration of any fluid particle
A)
Is never zero
B)
Is always zero
C)
Can be zero
D)
None of these
The correct choice is C (Can be zero), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-II
For a given discharge, the critical flow depth in an open channel depends on
A)
channel geometry only
B)
channel geometry and bed slope
C)
channel geometry, bed slope and roughness
D)
channel geometry, bed slope, roughness and Reynolds number
The correct choice is A (channel geometry only), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-II
Two biodegradable components of municipal solid waste are
A)
plastics and wood
B)
cardboard and glass
C)
leather and tin cans
D)
food wastes and garden trimmings
Correct option D: food wastes and garden trimmings.
Legal Metrology • 2018 • Civil Engineering Paper-II
In a domestic wastewater sample, COD and BOD were measured. Generally which of the following statement is true for their relative magnitude?
A)
COD = BOD
B)
COD > BOD
C)
COD < BOD
D)
Nothing can be said
The correct choice is B (COD > BOD), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-II
Fluids change the volume under external pressure due to
A)
plasticity
B)
viscosity
C)
compressibility
D)
none of these
The correct choice is C (compressibility), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-II
A polluted stream undergoes self purification in four district zones:
I. Zone of clear water
II. Zone of active decomposition
III. Zone of Degradation
IV. Zone of recovery
Correct sequence is:
A)
II, III, IV, I
B)
II, IV, III, I
C)
III, II, IV, I
D)
IV, III, II,I
Correct option C: III, II, IV, I.
Legal Metrology • 2018 • Civil Engineering Paper-II
Shear stress develops in a fluid element, if
A)
The fluid is at rest
B)
The fluid container is subjected to uniform linear acceleration
C)
The fluid is inviscid
D)
The fluid is viscous and the flow is non-uniform
The correct choice is D (The fluid is viscous and the flow is non-uniform), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-II
The locus of elevations that water will rise in a series of pitot tubes is called
A)
The energy grade line
B)
The hydraulic grade line
C)
The pressure head
D)
The velocity head
The correct choice is B. The sequence follows the numerical pattern described in the question, giving The hydraulic grade line.
Legal Metrology • 2018 • Civil Engineering Paper-II
Algae dies out, though fish life may survive, in a river zone, known as
A)
Zone of clear water
B)
Zone of active decomposition
C)
Zone of Degradation
D)
Zone of recovery
The correct choice is B (Zone of active decomposition), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-II
Ground water from artesian wells
A)
contains no suspended materials
B)
contains dissolved salts
C)
may be saltish and hard
D)
all of these
The correct choice is D (all of these), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-II
Particulate matter (fly ash) carried in effluent gases from the furnaces burning fossil fuels are better removed by
A)
Cotton bag house filter
B)
Electrostatic precipitator (ESP)
C)
Cyclone
D)
Wet scrubber
The correct choice is B (Electrostatic precipitator (ESP)), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-II
The necessary and sufficient condition for a surface to be called as a ‘free surface’ is
A)
no stress should be acting on it
B)
tensile stress acting on it must be zero
C)
shear stress acting on it must be zero
D)
no print on it should be under any stress
Correct option C: shear stress acting on it must be zero.
Legal Metrology • 2018 • Civil Engineering Paper-II
A coastal city produces municipal solid waste (MSW) with high moisture content, high organic materials, low calorific value and how inorganic materials. The most effective and sustainable option for MSW management in that city is
A)
Composting
B)
Dumping in sea
C)
Incineration
D)
Landfill
The correct choice is A (Composting), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-II
A mild-sloped channel is followed by a steep-sloped channel. The profiles of gradually varied flow in the channel are
A)
M3, S2
B)
M3, S3
C)
M2, S1
D)
M2, S2
Correct option C: M2, S1.
Legal Metrology • 2018 • Civil Engineering Paper-II
Which of the following is a non-recording rain gauge?
A)
Floating type rain gauge
B)
Symon’s rain gauge
C)
Steven’s weighing type rain gauge
D)
Tipping bucket rain gauge
The correct choice is B (Symon’s rain gauge), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-II
As per Noise Pollution (Regulation and Control) Rules 2000 of India, the day time noise limit for a residential zone, expressed in dB (A) Leq, is
A)
45
B)
55
C)
65
D)
75
Correct option B: 55.
Legal Metrology • 2018 • Civil Engineering Paper-II
Use of coagulants such as alum
A)
results in reduction of pH of the treated water
B)
results in increase in pH of the treated water
C)
results in no change in pH of the treated water
D)
may cause an increase or decrease of pH of the treated water
The correct choice is A (results in reduction of pH of the treated water), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-II
Consider the following unit processes commonly used in water treatment; rapid mixing (RM), flocculation (F), primary sedimentation (PS), secondary sedimentation (SS), chlorination (C) and rapid sand filtration (RSF). The order of these unit processes (first to last) in a conventional water treatment plant is
A)
PS–RSF–F–RM–SS–C
B)
PS–F–RM–RSF–SS–C
C)
PS–F–SS–RSF–RM–C
D)
PS–RM–F–SS–RSF–C
Correct option D: PS–RM–F–SS–RSF–C.
Legal Metrology • 2018 • Civil Engineering Paper-II
For a body completely submerged in a fluid, the centre of gravity (G) and centre of Buoyancy (O) are known. The body is considered to be in stable equilibrium if
A)
O does not coincide with the centre of mass of the displaced fluid
B)
G coincides with the centre of mass of the displaced fluid
C)
O lies below G
D)
O lies above G
The correct choice is D (O lies above G), consistent with standard C++ language rules.
Legal Metrology • 2018 • Civil Engineering Paper-II
In disinfection, which of the following forms of chlorine is most effective in killing the pathogenic bacteria?
A)
Cl
B)
OCl
C)
NH2Cl
D)
HOCl
Correct option D: HOCl.
