1 Such pipes are used to convey hot water and steam
C A C
– I
B G – I
C Copper
D plastic
2 Such pipes are suitable for acidic and alkaline waters
D A C
– I
B G – I
C Copper
D plastic
3 Life of a pipe can be enhanced by
D A galvanizing
B glazing
C painting
D all of these
4 Standard available length of PPRC pipe is
B A 8 ft
B 13 ft
C 16 ft
D 20 ft
5 Metalic pipes are bent
by
D A simple pipe bender
B hydraulic pipe bender
C pipe bending machine
D all of these
6 Vertical distance between dip and crown of a trap is called
C A seal
B break
C floor trap
D intercepting trap
7 A trap used to collect waste water of domestic sewer before
connecting public sewer is called
D A seal
B break
C floor trap
D intercepting trap
8 Average life of G.I fittings
B A 5 year
B 10 year
C 15 year
D 20 year
9 Average life of PPRC fittings
D A 5 year
B 10 year
C 15 year
D 25 year
10 Jointing method for PVC fitting
C A threading
B welding
C solution
D bracing
11 Plumbing fitting for a bath room
D A W.C
B W.B
C shower
D all of these
12 A fixture is used to get water from the pipe line
A A tap
B cock
C valve
D all of these
13 Fuller tap creates
________ at its closure
C A air pressure
B vacuum
B water hammar
D all of these
14 Compression tap does not create ___ at its closure
D A air pressure
B vacuum
C water hammar
D all of these
15 Such tap is used with wash basin
C A bib
B fuller
C piller
D globe
16 Globe tap is used for
A A bath tub
B sink
C wash hand basin
D none of these
17 Non return valve is also called
B A globe valve
B reflux valve
C float valve
D gate valve
18 Storage reservoir is a _______ source of water
C A pure
B big
C surface
D all of these
19 A well which gets water from a pervious layer below an
impervious layer is called
B A shallow well
B deep well
C tube well
D artisian well
20 Difference of level of the water table before pumping and after
pumping in a tube well is called
D A run off
B water cycle
C infiltration
D draw down
21 Quantity of water that can be obtained from a tube well with
unit draw down is called
A A specific yield
B water cycle
C inverted cone
D draw down
22 Ratio of consumption of water at morning and average daily
demand
B A 0.2
B 2.00
C 4.00
D 10
23 One gallon is equal to _______ litres
C A 10
B 6.25
C 4.54
D 3.75
24 Temperature of water should be less than in C degree for water
supply purposes
C A 20
B 15
C 10
D 5
25 WHO recommended maximum amount of fluorides in drinking water in
PPM
C A 0.2
B 2.0
C 4.0
D 10
26 Percentage of a sample to pure water for testing odour of water
is known as
B A percentage
B Threshold no.
C Rynold no.
D P.P.M
27 Temporary hardness of water can be removed simple by
B A cooling
B boiling
C adding alkali
D freazing
28 Value of hardness of very hard water in degrees
D A 3
B 7
C 9
D 11
29 Suspended particles present in the raw water settle easily
having specific gravity more than
D A 0.5
B 0.8
C 1.0
D 1.2
30 Capability of passing a certain quantity of water of settling
tank is called
B A efficiency
B loading capacity
C detention
D period
31 A time period for which a particle of water detains in settling
tank is called
C A design period
B stop period
C detention period
D dew time
32 Detension period required for a particle of water in plain
settling tank
B A 3 – 4 hours
B 4 – 8 hours
C 8 – 10 hours
D 10 -12 hours
33 The quantity of water is filtered in slow sand filter per hour
B A 50 – 100 lit / m2
B 100 – 200 lit / m2
C 200 – 300 lit / m2
D 300 – 400 lit / m2
34 A slow agitation carried out in coagulant mixed water is termed
as
C A acceleration
B retardation
C flocculation
D coagulation
35 Sterilisation is also called
C A clorination
B coagulation
C dis-infection
D flocculation
36 Dead end method of pipe layout is suitable for
C A square shape
B circular shape
C irregular
D all
of these
37 Water main runs on periphery of locality in the case of this
system of pipe layout
C A dead end
B grid iron
C circular
D radial
38 Elevated tank is located at the central place of pipe junction
in the case of this method of pipe layout
D A dead end
B grid iron
C circular
D radial
39 Surface reservoir is constructed to distribute water in the case
of this water supply system
A A gravity
B gravity and pumping
C continous pumping
D direct pumping
40 A well in which suction pipes of pumps are installed is called
D A tube well
B deep well
C dry well
D sump well
41 This pump has piston and plunger
B A centrifugal
B reciprocating
C airlift
D rotary
42 This pump is suitable for low head and minor discharge
D A centrifugal
B reciprocating
C airlift
D rotary
43 Dry waste collected from houses roads and market is called
A A garbage
B sludge
C sullage
D night soil
44 Used water collected from wash hand basin and kitchen is called
C A garbage
B sludge
C sullage
D night soil
45 Domestic and industrial sewage flow is called
C A garbage
B sludge
C sullage
D night soil
46 Solid matters collected after sedimentation of sewage is called
B A garbage
B sludge
C sullage
D night soil
47 Epidemic breakout is liable in the case of _______ system of
sewage disposing system
B A combined
B conservancy
C water carriage
D cesspool
48 Human excreta is disposed off with out water in case of
_________ system
C A combined
B conservancy
C water carriage
D cesspool
49 Which is raw sewage
A A without treatment
B after treatment
C both a and b
D none of these
50 For isolated houses this system of disposal is considered
suitable
D A combined
B conservancy
C water carriage
D cesspool
51 This sewerage system is suitable for areas where rainy season is
spread over the whole year
B A separate
B combined
C partially separate
D conservancy
52 The ground water entering in the sewer is called
A A infiltration
B exfiltration
C water table
D springs
53 Time taken by rain water to reach the sewer after commencing the
rain is called
D A detension
B interrupting
C design
D concentration
54 Rational formula is used to calculate
C A area
B volume
C discharge
D velocity
55 Chezy’s formula to calculate velocity of flow in meter / sec is
A A c√mi
b m√ci
c √cmi
d Ac√mi
56 Which is the slop of drain of 30 cm diameter having velocity 2.5
m/sec
A A 1:25
B 1:50
C 1:100
D 1:200
57 Minimum self cleaning velocity recommended is in meter
D A 4
B 3
C 2
D 1
58 Velocity of flow in the sewer should be between self cleaning
velocity and _____ velocity
C A minimum
B maximum
C scouring
D average
59 A pipe convaying human excreta and urinal is termed as
A A soil
B waste
C storm
D combined
60 A surface drain suitable for fluctuating discharge
D A rectangle
B circular
C semi circular
D V – Shaped
61 A vertical pipe convaying waste water is termed as
A A waste stack
B vertical stack
C soil stack
D double stack
62 For branch sewer connection minimum slope of house sewer
B A 2 %
B 4 %
C 6 %
D 8 %
63 This is an additional line parallel to centre line of sewer (at
a suitable distance)
D A interceping line
B line of sight
C grade line
D off set line
64 Timbering is necessary in ordinary soil for the depth of trench
more then ______ meter
B A 1.00
B 1.50
C 2.00
D 2.50
65 For testing a sewer at a head of 2.5 meters tolerance of _______
liters per centimeter dia of pipe is allowed
B A 1.00
B 2.00
C 2.50
D 3.00
66 At the time of back filling the trench loose material is layed in
_________ centimeter layes
B A 10 cm
B 15 cm
C 20 cm
D 30 cm
67 A manhole intercepting the sewage from two or more sewers at
different elevations is called
C A shallow manhole
B deep manhole
C drop manhole
D normal manhole
68 On a straight line spacing between two manholes for branch sewer
line is kept in meters
D A 50 – 100
B 100 – 150
C 150 – 200
D 300 – 500
69 A structure constructed for opening the closing of sewer line is
called
B A inlet
B cleanout
C lamp hole
D regulator
70 An appurtenance to divert storm water from combined sewer is
called
A A regulator
B outlet
C trestle and piear
D inverted siphon
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