Option A: 50 mg/l
Option B: 100 mg/l
Option C: 150 mg/l
Option D: 250 mg/l
Correct Answer: 50 mg/l ✔
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Option A: It is cheaper in construction
Option B: It provides maximum area for a given perimeter
Option C: It provides maximum hydraulic mean depth
Option D: All the above
Correct Answer: All the above ✔
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Option A: Water test is carried out to check water tightness of the joints
Option B: Test for straightness is carried out with the help of a lamp and mirror
Option C: Obstruction test is carried out with the help of smooth ball of diameter 13 mm
Option D: All the above
Correct Answer: All the above ✔
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Option A: 0.4 to 0.5 m
Option B: 0.5 to 0.7 m
Option C: 0.7 to 0.9 m
Option D: 0.9 to 1.20 m
Correct Answer: 0.7 to 0.9 m ✔
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Option A: Are used for carrying sewage and drainage from houses
Option B: Are manufactured from clays and shale
Option C: After casting are dried and burnt at temperature 150°C, 700°C and 1200°C
Option D: All the above
Correct Answer: All the above ✔
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Option A: Parabolic
Option B: Circular
Option C: Rectangular
Option D: New egged
Correct Answer: Circular ✔
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Option A: Standard egg shaped
Option B: Circular shaped
Option C: Horse shoe shaped
Option D: Parabolic shaped
Correct Answer: Horse shoe shaped ✔
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Option A: Degradation
Option B: Active decomposition
Option C: Recovery
Option D: Cleaner water
Correct Answer: Active decomposition ✔
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Option A: Glazed bricks sewers
Option B: Cast iron sewers
Option C: Cement concrete sewers
Option D: Stone ware sewers
Correct Answer: Glazed bricks sewers ✔
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Option A: Circular
Option B: Egg shaped
Option C: Rectangular
Option D: Horse shoe shaped
Correct Answer: Egg shaped ✔
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Option A: 5 cm
Option B: 10 cm
Option C: 15 cm
Option D: 20 cm
Correct Answer: 5 cm ✔
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Option A: 2 hours
Option B: 3 hours
Option C: 4 hours
Option D: 5 hours
Correct Answer: 4 hours ✔
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Option A: Velocity of flow
Option B: Viscosity of water
Option C: Size and shape of solid
Option D: All the above
Correct Answer: All the above ✔
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Option A: 0.30 m/sec
Option B: 0.35 m/sec
Option C: 0.40 m/sec
Option D: 0.45 m/sec
Correct Answer: 0.45 m/sec ✔
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Option A: House sewer
Option B: Lateral sewer
Option C: Branch sewer
Option D: Sewer outfall
Correct Answer: Sewer outfall ✔
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Option A: 100 cm
Option B: 120 cm
Option C: 140 cm
Option D: 160 cm
Correct Answer: 160 cm ✔
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Option A: Turbidity
Option B: Colour
Option C: Odour
Option D: All the above
Correct Answer: All the above ✔
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Option A: Alkaline
Option B: Acidic
Option C: Highly decomposed
Option D: A source of objectionable odour
Correct Answer: Alkaline ✔
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For detecting the nitrites in the sewage, the matching colour may be developed by adding__________?
Option A: Potassium permanganate
Option B: Sulphuric acid and napthamine
Option C: Phenol-di -sulphuric acid potassium hydroxide
Option D: None of these
Correct Answer: Sulphuric acid and napthamine ✔
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Option A: Magnetic compass
Option B: Theodolite
Option C: Level
Option D: Clinometer
Correct Answer: Level ✔
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Option A: 213.5 cm/sec
Option B: 313.5 cm/sec
Option C: 413.5 cm/sec
Option D: 500 cm/sec
Correct Answer: 313.5 cm/sec ✔
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Option A: Kinchling
Option B: Lloyd Davis
Option C: Frubling
Option D: All the above
Correct Answer: All the above ✔
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Option A: Leaping weir
Option B: Overflow weir
Option C: Siphon spill way
Option D: None of these
Correct Answer: Siphon spill way ✔
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Option A: 10 cm
Option B: 12 cm
Option C: 15 cm
Option D: 18 cm
Correct Answer: 15 cm ✔
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Option A: Full depth
Option B: Half full
Option C: Two third full
Option D: Three fourth full
Correct Answer: Half full ✔
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Option A: [(100 + P1)/(100 – P2)] V1
Option B: [(100 – P1)/(100 + P2)] V1
Option C: [(100 – P1)/(100 – P2)] V1
Option D: [(100 + P2)/(100 – P1)] V1
Correct Answer: [(100 – P1)/(100 – P2)] V1 ✔
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Option A: Anaerobic decomposition
Option B: Aerobic decomposition
Option C: Parasitic decomposition
Option D: None of these
Correct Answer: Anaerobic decomposition ✔
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Option A: Chezy
Option B: Manning
Option C: Bazin
Option D: Kutter
Correct Answer: Manning ✔
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Option A: 100 mg/l
Option B: 200 mg/l
Option C: 300 mg/l
Option D: 400 mg/l
Correct Answer: 300 mg/l ✔
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Option A: Both A and R are true and R is the correct explanation of A
Option B: Both A and R are true but R is not a correct explanation of A
Option C: A is true but R is false
Option D: A is false but R is true
Correct Answer: Both A and R are true and R is the correct explanation of A ✔
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Option A: Industrial sewage
Option B: Domestic sewage
Option C: Storm water
Option D: Inclusive of domestic and industrial sewage but excludes storm water
Correct Answer: Storm water ✔
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Option A: Nitrites
Option B: Nitrates
Option C: Free ammonia
Option D: Aluminoid nitrogen
Correct Answer: Nitrates ✔
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Option A: Silting
Option B: Low discharge
Option C: Greasy and oily matters
Option D: All the above
Correct Answer: All the above ✔
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Option A: House sewer
Option B: Lateral sewer
Option C: Intercepting sewer
Option D: Main sewer
Correct Answer: House sewer ✔
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Option A: 1 in 60
Option B: 1 in 100
Option C: 1 in 120
Option D: None of these
Correct Answer: 1 in 120 ✔
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Option A: From low lying areas
Option B: From flat areas
Option C: From basements
Option D: All the above
Correct Answer: All the above ✔
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Option A: Water test
Option B: Ball test
Option C: Mirror test
Option D: All of these
Correct Answer: All of these ✔
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Option A: Centrifugal pump
Option B: Reciprocating pump
Option C: Pneumatic ejector
Option D: None of these
Correct Answer: Centrifugal pump ✔
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Option A: 20% of the design discharge
Option B: Slightly less than 5% of the design discharge
Option C: Slightly more than 5% of the design discharge
Option D: None of these
Correct Answer: Slightly less than 5% of the design discharge ✔
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Option A: Size
Option B: Shape
Option C: Weight
Option D: None of these
Correct Answer: None of these ✔
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Option A: Should be sunk by 20 cm
Option B: Should be kept 20 cm above the adjacent portion
Option C: Should be sunk by 50 cm
Option D: Need not be sunk
Correct Answer: Should be sunk by 50 cm ✔
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Option A: 0.68 m
Option B: 0.88 m
Option C: 1.36 m
Option D: 1.76 m
Correct Answer: 1.36 m ✔
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Option A: Kgs
Option B: Joules
Option C: Newtons
Option D: Watts
Correct Answer: Watts ✔
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For the survival of fish in a river stream, the minimum dissolved oxygen is prescribed__________?
Option A: 3 ppm
Option B: 4 ppm
Option C: 5 ppm
Option D: 10 ppm
Correct Answer: 4 ppm ✔
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Option A: Alum
Option B: Ferric chloride
Option C: Ferric sulphate
Option D: Chlorinated copperas
Correct Answer: Ferric chloride ✔
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Option A: 1/4
Option B: 1/3
Option C: 1/2
Option D: 3/4
Correct Answer: 1/3 ✔
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Option A: Screening
Option B: Skimming
Option C: Filtration
Option D: None of these
Correct Answer: Skimming ✔
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Option A: Velocity of flow
Option B: Diameter of the sewer
Option C: Discharge
Option D: All the above
Correct Answer: All the above ✔
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Option A: 1 day
Option B: 2 days
Option C: 3 days
Option D: 5 days
Correct Answer: 5 days ✔
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Option A: One hour
Option B: Two to three hours
Option C: Three to four hours
Option D: Six hours
Correct Answer: Three to four hours ✔
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Option A: 100 cm
Option B: 110 cm
Option C: 120 cm
Option D: 150 cm
Correct Answer: 120 cm ✔
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Option A: Invert level of a branch sewer is more than 60 cm that of the main sewer
Option B: Sewer line runs along a main road
Option C: Ordinary manhole cannot be built
Option D: Two sewer lines intersect
Correct Answer: Invert level of a branch sewer is more than 60 cm that of the main sewer ✔
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Option A: Carbon dioxide
Option B: Hydrogen
Option C: Ammonia
Option D: All the above
Correct Answer: All the above ✔
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Option A: House sewers
Option B: Lateral sewers
Option C: Branch sewers
Option D: Main sewers
Correct Answer: House sewers ✔
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Option A: Anaerobic bacteria
Option B: Aerobic bacteria
Option C: Both types of bacterias
Option D: None of these
Correct Answer: Anaerobic bacteria ✔
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Option A: Minimum flow
Option B: Maximum flow
Option C: Both A. and B.
Option D: None of these
Correct Answer: C. Both A. and B. ✔
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Option A: D8/3 = 4 b8/3
Option B: D3/8 = 4 b3/8
Option C: D2/3 = 4 b2/3
Option D: D3/2 = 4 b3/2
Correct Answer: D8/3 = 4 b8/3 ✔
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Option A: The change of gradient
Option B: The change of direction
Option C: The junctions of sewers
Option D: All of these
Correct Answer: All of these ✔
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Option A: In freshly produced sewage
Option B: At sewer pipes
Option C: In sewer treatment plants
Option D: None of these
Correct Answer: In freshly produced sewage ✔
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Option A: Screening
Option B: Sedimentation
Option C: Oxidation
Option D: All the above
Correct Answer: All the above ✔
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Option A: 0.5 to 1.0 kg
Option B: 1 kg to 2.0 kg
Option C: 5 kg to 7.5 kg
Option D: 7.5 kg to 10 kg
Correct Answer: 0.5 to 1.0 kg ✔
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Option A: 1 in 60
Option B: 1 in 100
Option C: 1 in 120
Option D: None of these
Correct Answer: 1 in 60 ✔
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Option A: Hydrochloric acid
Option B: Sulphuric acid
Option C: Nitric acid
Option D: Citric acid
Correct Answer: Sulphuric acid ✔
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Option A: House sewer
Option B: Out-fall sewer
Option C: Branch sewer
Option D: Main sewer
Correct Answer: Out-fall sewer ✔
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Option A: Hydrogen sulphide
Option B: Carbon dioxide
Option C: Methane
Option D: Oxygen
Correct Answer: Hydrogen sulphide ✔
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Option A: Carbondioxide
Option B: Hydrogen sulphide
Option C: Methane
Option D: All of these
Correct Answer: All of these ✔
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Option A: 100 to 500
Option B: 500 to 1000
Option C: 1000 to 1500
Option D: 1500 to 2000
Correct Answer: 500 to 1000 ✔
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Option A: Flushing
Option B: Cane rodding
Option C: Wooden pills
Option D: None of these
Correct Answer: Flushing ✔
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Option A: Hydrogen sulphide (H2S)
Option B: Carbon dioxide (CO2)
Option C: Methane (CH4)
Option D: All the above
Correct Answer: All the above ✔
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Option A: 1/3
Option B: 0/2
Option C: 0/3
Option D: 2 /3
Correct Answer: 2 /3 ✔
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Option A: More than the rate of water supply
Option B: Equal to the rate of water supply
Option C: Less than the rate of water supply
Option D: At 150 litres per capita
Correct Answer: At 150 litres per capita ✔
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Option A: 10.0
Option B: 5.0
Option C: 2.0
Option D: 0.25
Correct Answer: 0.25 ✔
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Option A: R.C.C.
Option B: P.C.C.
Option C: Cast iron
Option D: Glazed stonewares
Correct Answer: Glazed stonewares ✔
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Option A: 2.25
Option B: 2.50
Option C: 2.55
Option D: 2.65
Correct Answer: 2.65 ✔
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Option A: Parabolic shaped
Option B: Horse shoe shaped
Option C: Egg shaped
Option D: Circular shaped
Correct Answer: Horse shoe shaped ✔
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Option A: R.C.C.
Option B: Glazed stone wares
Option C: Asbestos cement
Option D: Glazed ware
Correct Answer: Glazed ware ✔
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Option A: Surface loading
Option B: Overflow rate
Option C: Overflow velocity
Option D: All of these
Correct Answer: All of these ✔
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Option A: Size
Option B: Shape
Option C: Weight
Option D: None of these
Correct Answer: None of these ✔
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Option A: Settleable solids
Option B: Suspended solids
Option C: Dissolved solids
Option D: None of these
Correct Answer: Settleable solids ✔
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Option A: 10% less
Option B: 20% less
Option C: 10% more
Option D: 20% more
Correct Answer: 20% less ✔
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Option A: Silting occurs at bottom
Option B: Scouring occurs at bottom
Option C: Both silting and scouring occur at bottom
Option D: Neither silting nor scouring occurs at bottom
Correct Answer: Neither silting nor scouring occurs at bottom ✔
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Option A: 1 –
Option B: 1 –
Option C: ½ (1 –
Option D: ½ (1 –
Correct Answer: 1 – ✔
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Option A: Manually
Option B: Mechanically
Option C: Hydraulically
Option D: Electrically
Correct Answer: Manually ✔
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Option A: 20 cm
Option B: 25 cm
Option C: 40 cm
Option D: 50 cm
Correct Answer: 50 cm ✔
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Option A: Carbon dioxide
Option B: Nitrates
Option C: Sulphates
Option D: All the above
Correct Answer: All the above ✔
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Option A: House sewer
Option B: Lateral sewer
Option C: Branch sewer
Option D: All of these
Correct Answer: All of these ✔
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Option A: 10 cm
Option B: 12.5 cm
Option C: 15 cm
Option D: 25 cm
Correct Answer: 15 cm ✔
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Option A: 0.010
Option B: 0.011
Option C: 0.012
Option D: 0.013
Correct Answer: 0.013 ✔
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Option A: Boiling
Option B: Adding potassium permanganate
Option C: Adding sulphuric acid
Option D: Phenol-di-sulphuric acid
Correct Answer: Boiling ✔
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Option A: 3 years
Option B: 3.5 years
Option C: 4 years
Option D: 5 years
Correct Answer: 3 years ✔
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Option A: Irrigation
Option B: Dilution
Option C: Oxidation
Option D: Purification
Correct Answer: Dilution ✔
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Option A: 204 cu.m
Option B: 208 cu.m
Option C: 212 cu.m
Option D: 216 cu.m
Correct Answer: 216 cu.m ✔
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Option A: Both A and R are true and R is the correct explanation of A
Option B: Both A and R are true but R is not a correct explanation of A
Option C: A is true but R is false
Option D: A is false but R is true
Correct Answer: Both A and R are true and R is the correct explanation of A ✔
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Option A: Degradation
Option B: Active decomposition
Option C: Recovery
Option D: Cleaner water
Correct Answer: Degradation ✔
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For design purposes, the normal rate of infiltration of ground water into the sewer, is__________?
Option A: 500 litres/km/cm
Option B: 1000 litres/km/cm
Option C: 1500 litres/km/cm
Option D: 2000 litres/km/cm
Correct Answer: 2000 litres/km/cm ✔
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Option A: Industrial areas
Option B: Large town ships
Option C: Hilly town ships
Option D: Cities in plains
Correct Answer: Hilly town ships ✔
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Option A: Sanitary sewage
Option B: Storm sewage
Option C: Surface water
Option D: Ground water
Correct Answer: Sanitary sewage ✔
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