Plumber Questions and Answers on Plumbing
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Plumber Questions and Answers for ITI Plumbing Trade
1. Which valve is provided at intervals in long mains to prevent hack pressure on the pump and in raising lines to prevent backflow of water?
(A) Gate valve
(B) Mud valve
(C) Reflux valve
(D) Pressure relief valve
2. What distribution system is suitable for towns growing irregularly?
(A) Dead End System
(B) Grid Iron System
(C) Radial System
(D) Ring System
3. Spun Iron pipes used in water supply shall confirm to IS Number is :
(A) 1534
(B) 1535
(C) 1536
(D) 1537
4. What fittings are used in pipelines, that easy to dismantle and repair?
(A) Elbow
(B) Union
(C) Reducer
(D) Cap
5. What is the disadvantage of GI pipe?
(A) It can be easily jointed after threading.
(B) It is easy to detach joint.
(C) This pipe can be easily affected by acid or alkaline water.
(D) It will not get rusted easily because of galvanisation.
6. Which vice is used for holding round sections of metals, tubes and pipes?
(A) Pipe vice
(B) Bench vice
(C) Pin vice
(D) Hand vice
7. Soft solders whose melting points are below:
(A) 300°C
(B) 350°C
(C) 400°C
(D) 450°C
8. The try square is used to:
(A) Check the squareness
(B) Check the flatness
(C) Markline at 90° to the edges of work piece
(D) All the above
9. Calipers are classified according to their :
(A) joints and thickness
(B) Thickness and width
(C) Joints and legs
(D) Leg and width
10. Metals which contain iron as major content are called :
(A) Non Ferrous Metals
(B) Ferrous Metals
(C) Non Metal
(D) Alloy
11. Which is used to cut external threads on cylindrical work pieces?
(A) tap and wrench
(B) pipe wrench
(C) spanner
(D) die and stuck
12. Melting point of Bronze is :
(A) 1083°C
(B) 1005°C
(C) 983°C
(D) 660°C
13. Rolling thin layer of metal on to a base metal is known as :
(A) Browning
(B) Enamelling
(C) Electroplating
(D) Cladding
14. Ordinary Portland cement is available in, how many grades?
(A) 2
(B) 3
(C) 4
(D) 5
15. ___________ C.I. cover provided for manholes constructed within width of road under vechicular traffic.
(A) Light duty
(B) Medium duty
(C) Heavy duly
(D) None of these
16. Minimum size of a bibcock is :
(A) 15 mm
(B) 20 mm
(C) 23 mm
(D) 30 mm
17. Which valve is provided at the bottom of suction pipe for holding water in the suction pipe?
(A) Foot valve
(B) Ball valve
(C) Gate valve
(D) Globe valve
18. Floor trap is also known as:
(A) Gully trap
(B) Running trap
(C) Nahani trap
(D) Intercepting trap
19. Commode is known as :
(A) Urinal
(B) E.W.C.
(C) L.W.C.
(D) Sink
20. Advantage of P.V.C. pipe is
(A) Light weight
(B) Corrosion free
(C) Cost of P.V.C pipe is cheaper than G.I. pipe
(D) All the above
21. Which system is also known as combined gravity and pumping system?
(A) Gravity System
(B) Duel System
(C) Direct Pumping System
(D) None of these
22. Shovel is designed by its :
(A) length and weight
(B) width and weight
(C) length and width
(D) length
23. How many system is are adopted in plumbing of drainage work in a building?
(A) 3
(B) 4
(C) 5
(D) 6
24. What test is applied to check the alignment and condition of the inside of the pipes?
(A) Smoke test
(B) Hydrostatic test
(C) Pneumatic test
(D) Mirror test
25. Force Cup is used for _________ purpose.
(A) Blockage removing
(B) O.H. tank cleaning
(C) Testing of drain pipe
(D) Testing of soil pipe
26. _______ is the best and the most improved type of system of plumbing.
(A) One Pipe System
(B) Two Pipe System
(C) Single Stack System
(D) Partially Ventilated System
27. A water having pH less than 7 is :
(A) Alkaline
(B) Potable
(C) Acidic
(D) Neutral
28. Siphonic action is prevented by :
(A) Vent pipe
(B) Soil pipe
(C) Waste pipe
(D) Rainwater pipe
29. Which tap is used in wash hand basin?
(A) Bib tap
(B) Sell closing tap
(C) Plug tap
(D) Pillar tap
30. What is the size of holes in European water closet for fixing the floor?
(A) 6.5 mm
(B) 7 mm
(C) 7.5 mm
(D) 8 mm
31. The most commonly adopted pump in water supply is :
(A) Rotary pump
(B) Airlift pump
(C) Centrifugal pump
(D) Booster pump
32. The process which removes colloidal matters in water is:
(A) Screening
(B) Sedimentation
(C) Disinfection
(D) Filtration
33. S.W.H. System stands for:
(A) Soil Waste Harvesting
(B) Soft Water Heating
(C) Solar Water Heating
(D) Soft Water Harvesting
34. Which is not a surface source of water?
(A) Streams
(B) Wells
(C) Pond
(D) Lake
35. Automatic flushing cisterns are done by :
(A) E.W.C
(B) L.W.C
(C) Urinal
(D) Bidet
36. Which is used for closing the end of a pipe or fitting having a male thread?
(A) Union
(B) Plug
(C) Socket
(D) Cap
37. Which punch is used for locating drilling holes?
(A) Centre punch
(B) Dot punch
(C) Prick punch
(D) Hollow punch
38. Which file is used to bring the material in accurate size with high degree of finish?
(A) Smooth file
(B) Second cut file
(C) Rasp cut file
(D) Dead smooth file
39. Plain or unthreaded portion of 1/3 of the length of the screw is called :
(A) Head
(B) Shank
(C) Pitch
(D) Point
40. Water meter in piping system is used to check up :
(A) quantity
(B) quality
(C) pressure
(D) controlling
41. The pipe receiving discharge from water closet, urinals etc. are called :
(A) Waste pipe
(B) Soil pipe
(C) Rainwater pipe
(D) Ventilation pipe
42. To prevent corrosion CI pipes are coated with :
(A) Zinc
(B) Chromium
(C) Tin
(D) Bituminous paint
43. While grinding, metal particles are get clogged into the grinding wheel. This process is called :
(A) Loading
(B) Glazing
(C) Dressing
(D) Truing
44. The traps are used to prevent the passage of :
(A) Air
(B) Waste water
(C) Oxygen
(D) Sewerages
45. Access of inspection testing and cleaning of drain is provided by :
(A) Trap
(B) Cistern
(C) inspection chamber
(D) gratings
46. ________ helps the pipeline to branch off at 90°.
(A) Tee bow
(B) Coupling
(C) Elbow
(D) Union
47. The length of stoneware pipe is :
(A) 300 mm
(B) 400 mm
(C) 500 mm
(D) 600 mm
48. How many grades of G.I pipes are available?
(A) 2
(B) 3
(C) 4
(D) 5
49. The aggregates which cannot pass IS Sieve – No : 480 has been classified as :
(A) Coarse aggregate
(B) Medium aggregate
(C) Fine aggregate
(D) None of these
50. __________ is used for plastering, brick laying and finishing concrete floors.
(A) Spade
(B) Plumb hub
(C) Spirit level
(D) Trowel
51. Which saw is used for cutting sharp comers?
(A) Coping saw
(B) Compass saw
(C) Fret saw
(D) Pad saw
52. Brass is an alloy of :
(A) Copper and tin
(B) Copper and Zinc
(C) Copper and lead
(D) Copper and Aluminium
53. Which tap is used to finish the threads of blind holes of correct depth?
(A) Taper tap
(B) Intermediate tap
(C) Bottoming tap
(D) First tap
54. Function of flux is :
(A) to prevent corrosion
(B) to helps molten solder to flow easily in the required place
(C) promote better joint
(D) all of the above
55. Which tongs are used for holding bars vertically?
(A) Round tongs
(B) Square mouth tongs
(C) Hollow tongs
(D) Flat tongs
56. Ore of Aluninium is :
(A) Carbonate
(B) Bauxite
(C) Lemonite
(D) Magnefite
57. Check valve is also called :
(A) Gale valve
(B) Mud valve
(C) Nun-return valve
(D) Needle valve
58. Which threaded pattern is used in standard pipe fittings?
(A) B.S.P.
(B) B.S.W
(C) B.S.F.
(D) B.A
59. Pillar tap should withstand an internally applied hydraulic pressure of :
(A) 20 kg/sq.cm
(B) 25 kg/sq.cm
(C) 30 kg/sq.cm
(D) 35 kg/sq.cm
60. What pipes are mostly used in Water Supply Scheme?
(A) Steel pipe
(B) lead pipe
(C) Cast iron pipe
(D) Composite pipe
61. What should be used to connect two pipe with same diameter?
(A) Reducer
(B) Socket
(C) Eccentric Reducer
(D) Concentric Reducer
62. The most important part of a trap is :
(A) Water seal
(B) Diameter
(C) Depth of water
(D) Height
63. For achieving self cleaning velocity, 150 mm dia pipe should have a slope of :
(A) 1:35
(B) 1:40
(C) 1:50
(D) 1:60
64. Lead caulked joints are provided in _____________ pipe.
(A) G.I. pipe
(B) C.I pipe
(C) R.C.C. pipe
(D) AC pipe
65. Overflow from a tank is controlled by :
(A) Gate valve
(B) Safety valve
(C) Ball valve
(D) Mud valve
66. The fittings used to cover the inlet in gully, disconnection and silt trap is :
(A) C.I. gratings
(B) Small C.I. cover
(C) light duty C.I. cover
(D) Heavy Duty C.I. cover
67. Flush valves are made of:
(A) Cast Iron
(B) Brass
(C) Fiber
(D) Plastic
68. Temporary hardness can be removed by :
(A) Base exchanged process
(B) Filtration
(C) Screening
(D) Boiling
69. Which grade cement is used to constructing normal building purpose?
(A) 23
(B) 33
(C) 43
(D) 53
70. Vicat’s needle apparatus is used for :
(A) Mixing
(B) Measuring
(C) Filling of concrete
(D) Consistency
71. An example of Non-ferrous metal is :
(A) Cast Iron
(B) Lead
(C) Wrought Iron
(D) Mild Steel
72. The diameter of the main ventilation pipe should not be less than __________ mm.
(A) 32
(B) 40
(C) 50
(D) 70
73. Benefits of Rain Water harvesting is :
(A) Ground water table raises
(B) Reduce the salinity
(C) To avoid flooding
(D) All the above
74. Which colour hose is used for carry accetylene gas?
(A) Maroon
(B) Black
(C) Green
(D) Blue
75. Which pump is used to increase the pressure in pipe of a distribution system?
(A) Air lift pump
(B) Submersible pump
(C) Centrifugal pump
(D) Booster pump
76. Which is commonly called as thumb nut?
(A) Tee nut
(B) Cap nut
(C) Knurled nut
(D) Self locking nut
77. Which chisel is used for squaring materials at the corner?
(A) Diamond point chisel
(B) Web chisel
(C) Flat chisel
(D) Cross cut chisel
78. Head of the soldering Iron is made of
(A) Bronze
(B) Brass
(C) Forged Copper
(D) Aluminium
79. P.V.C. stands for :
(A) Premium Vinyl Chloride
(B) Poly Vinyl Chloride
(C) Perfect Vinyl Chloride
(D) Pure Vinyl Chloride
80. I.S. Code of water closet is :
(A) I.S 2554
(B) I.S 2555
(C) I.S 2556
(D) I.S 2557
81. Why water seal is required in a trap?
(A) To allow the passage of waste water
(B) To prevent the flow of waste water
(C) To prevent the passage of foul gases from the drain
(D) To block the soil passage
82. Rotary pumps are :
(A) Centrifugal type
(B) Pneumatic type
(C) Displacement type
(D) Hand operated type
83. The presence of Minerals caused in water :
(A) Hardness
(B) Colour
(C) Turbidity
(D) Taste
84. The permissible turbidity of domestic water is :
(A) 5 to 12 p.p.m
(B) 5 to 8 p.p.m
(C) 5 to 10 p.p.m
(D) 5 to 7 p.p.m
85. The Gravity system of water distribution is depends on
(A) Size of pipe
(B) Size of distribution tank
(C) Heights of distribution tank
(D) Location of valves
86. Stand pipes are provided at the distribution system of :
(A) Starting point
(B) Lowest point of distribution system
(C) Highest point of distribution system
(D) Dead end of distribution system
87. Pressure Relief valves are provided in a water line for :
(A) Increase the water pressure
(B) Regulate the pressure of flow
(C) Relieve high pressure from the line
(D) Divert the pressure
88. Hydrant is provided for:
(A) Irrigation purpose
(B) Fire fighting purpose
(C) Drinking purpose
(D) Washing purpose
89. Self- closing water taps are capable for :
(A) Wash basin
(B) Public drinking fountain
(C) Kitchen sink
(D) Batch room
90. Reseating tool is used for:
(A) cleaning of valve
(B) dismantling of valve
(C) setting of valve
(D) levelling and cleaning of valve seat
91. The name employed for a fitting, having a larger size at one end than on the other :
(A) Elbow
(B) Reducer
(C) Tee joint
(D) Union
92. What should be the minimum distance between the hot and cold-water risers in a plumbing system?
(A) 150 mm
(B) 200 mm
(C) 250 mm
(D) 300 mm
93. The size of vent pipe is determined according to :
(A) According to the Size of drain and Number of drainpipe
(B) According to the Length of drain and Number of drain
(C) According to the Number of fittings and Size of fittings
(D) According to the Number of traps installed in the line
94. Why bottom of the leaching cesspool made watertight?
(A) for store the effluent
(B) effluent get dispersed in to the surrounding soil
(C) to spared effluent to ground
(D) for safe deposit
95. Where lime concrete is used?
(A) Heavy duly construction
(B) Light duty construction
(C) Under foundation
(D) Roof concreting
96. Why reinforcement in added in cement concrete?
(A) For easy setting
(B) For increasing load capacity
(C) For heavy pressure
(D) For water proof
97. Mild steel pipe after galvanization is called :
(A) MS pipe
(B) GI Pipe
(C) CI Pipe
(D) Steel pipe
98. The name of valve which prevents the back flow of water is known as?
(A) Gate valve
(B) Ball valve
(C) Check valve
(D) Stop valve
99. The Height of water meter above the water supply line should be :
(A) 100 cm
(B) 50 cm
(C) 30 cm
(D) 20 cm
100. For checking and clearing of house drain, the access is provided by:
(A) Inspection chamber
(B) Door we
(C) Manhole
(D) Lamp hole
101. The minimum size of a public sewer should be :
(A) 60 mm
(B) 60 cm
(C) 60 Inch
(D) 60 Foot
102. The minimum distance between a water source and a septic tank should be :
(A) 15m
(B) 20m
(C) 25m
(D) 100m
103. A structure constructed for drawing water from reservoir is called :
(A) Check dam
(B) Pool
(C) In take
(D) Cesspool
104. Alum is used as:
(A) As disinfent
(B) Filter media
(C) Coagulant
(D) Water softener
105. The trap which provided at drop man hole is called :
(A) Gully trap
(B) Floor trap
(C) Intarcepting trap
(D) Bottle trap
106. An inverted siphon is a:
(A) Sanitary fitting
(B) Sewer section
(C) Masonry fitting
(D) House sewer section
107. Place preferred to fix scour valve is :
(A) In the distribution system at dead ends
(B) in the distribution system at middle
(C) In the distribution system at highest portion
(D) In the distribution system at lowest portion
108. The coal tar coating of CI pipe is done to :
(A) Protect against correction
(B) Protect against flexibility
(C) Protect against brittleness
(D) Protect against fusibility
109. Steel pipes are joined by :
(A) Capillary joint
(B) Welded joint
(C) Adhesive joint
(D) Bell and spigot joint
110. Withstanding pressure capacity of steel pipe is : –
(A) Higher than CI pipe
(B) Lower than AC pipe
(C) Lower than CI pipe
(D) Lower than SWG pipe
111. Copper pipe can easily bend but :
(A) can’t cut
(B) can’t reduce
(C) do not sag
(D) can’t joint
112. Soft solder capillary joints are used for :
(A) CI Pipe joint
(B) AC pipes joint
(C) Copper pipes joint
(D) Lad pipes joint
113. PVC pipe can resist:
(A) High external load
(B) High temperature
(C) Moat inorganic chemicals
(D) Extra heavy water pressure
114. The layers of Composite pipes are :
(A) Polyethylene, Aluminum and Polyethylene respectively
(B) Polyethylene, Fibber and Polyethylene respectively
(C) Fibber, Aluminum and Polyethylene respectively
(D) Aluminum, Fibber and Polyethylene respectively
115. The mostly used CI pumping main joint are :
(A) Adhesive joint
(B) Socket and spigot joint
(C) Screwed joint
(D) Flanged joint
116. The depth of Hemp used in a Socket and spigot joint are
(A) 50 cm
(B) 30 cm
(C) 20 cm
(D) 5 cm
117. Flanged joint are capable for :
(A) Where it maybe lay underground
(B) Where it maybe occasionally dismantle or reaesembling
(C) Where it maybe bear vibration or deflection of pipe
(D) Where it maybe bear high velocity of flow
118. Sand cast CI pipe used in water supply shall conform to :
(A) ISI.2526
(B) ISI.2625
(C) ISI.1536
(D) ISI.1729
119. On a gate valve water flow from around the stuffing box Why?
(A) Valve seat worn-out
(B) Defective packing in the stuffing box
(C) Valve is old and unserviceable
(D) In a gate valve
120. In which valve have an internal partition in it?
(A) Gate valve
(B) Sluice valve
(C) Glob valve
(D) Check valve
121. Where the flush hydrant are insulated?
(A) Ground level
(B) Underground
(C) Upto 90 cm above the ground level
(D) Above the ground
122. The water meter which used for measuring small flow of water is :
(A) Venturimeter
(B) Positive displacement water motor
(C) Receprocative
(D) Turbine type
123. Union joint must be :
(A) At every 50 m
(B) At every 76 m
(C) Al every 100 m
(D) At every 200 in
124. Water is mechanically lifted by means of:
(A) By pulley
(B) By tubs
(C) By bucket
(D) By pump
125. What is the function of foot valve?
(A) To hold water in delivery
(B) To drain out water from delivery
(C) To hold water in suction
(D) To drain out water from suction
126. To prevent the water hammer :
(A) Valves and taps should be avoid
(B) Valves and taps should be closed slowly
(C) Valves and taps should be always open
(D) Valves and taps should be always close
127. Water supply is designed for :
(A) An estimated population
(B) Quantity of water available
(C) The catchment area
(D) Quality of water
128. In India which type of supply system is followed?
(A) In dual system
(B) Direct pumping system
(C) In the intermittent supply system of water
(D) Continuous supply system water
129. The treatment of water is depend upon the :
(A) Quantity of water
(B) Quality of water
(C) Turbidity of water
(D) Hardness of water
130. Permeable hardness of soft water is :
(A) 0 to 75 mg/lit
(B) 0 to 80 mg/lit
(C) 0 to 85 mg/lit
(D) 0 to 90 mg/lit
131. Lime soda process is employed for :
(A) Sedimentation of water
(B) Removal of temporary hardness of water
(C) Removal of permanent hardness;
(D) Removal of colloidal impurities of water
132. pH value acceptable in public water supply is :
(A) 9.0 to 10
(B) 7 to 8.5
(C) 6.5 to 9.2
(D) 5.5 to 8.5
133. Filtration process is removal off?
(A) Floating matters
(B) Suspended matters
(C) Fine Suspended matters
(D) Microorganisms and colloidal matters
134. Intake shall be :
(A) Near the source of water
(B) Higher than the source of water
(C) Far from the source of water
(D) No any distraction
135. Slow sand filters are
(A) Gravity type
(B) Non pressure type
(C) Flow type
(D) Pressure type
136. Clogged filter media in Rapid sand filter is removed by :
(A) Changing media
(B) By scraping
(C) Back wash
(D) Never to clean
137. Most frequently used fitting in water supply is
(A) Gate valve
(B) Float valve
(C) Pillar tap
(D) Bib cock
138. Priming is the process of :
(A) Removing the trapped water
(B) Removing the trapped waste matters
(C) Removing the trapped air
(D) Removing the damaged parts
139. To increase the sufficient pressure of distribution system :
(A) Jet pump is required
(B) Stage pump is required
(C) Turbine pump is required
(D) Buster pump is required
140. The valve which installed suction end is :
(A) Check valve
(B) Foot valve
(C) Non-return valve
(D) Pin valve
141. Instant water heaters are:
(A) Automatic type
(B) Pressure type
(C) Manual type
(D) Non pressure type
142. Water heater to be swatch on :
(A) After texting
(B) After drain out
(C) After loading water
(D) Without water
143. One of the benefits of rain water harvesting is :
(A) Ground water table raise
(B) Sea level will raise
(C) Surface source will over flow
(D) Run off will clean the ground
144. The top of the sump shall be 150 mm above the formation of ground level Why?
(A) For identification
(B) For made a structure over it
(C) For preventing the entry of surface water
(D) For made a office building over it
145. The best and most improved system of sanitary plumping is :
(A) One pipe system
(B) Ingle stack system
(C) Two pipe system
(D) Combined system
146. The second set of pipe in two pipe system is recommended for :
(A) Carrying sullage waste
(B) Carrying floor water only
(C) Carrying soil waste
(D) Carrying sullage and soil waste
147. Lateral fittings are called :
(A) Soil fittings
(B) Waste fittings
(C) Common fittings
(D) Both soil and waste fittings
148. Which one of the following is the method of drawing water from river bed?
(A) Deep well
(B) Ground well
(C) Intake well
(D) Tub well
149. Water will not available for fire extinguishing from?
(A) In dual system
(B) Continuous supply system water
(C) Direct pumping system
(D) In the intermittent supply system of water
150. Which system of water supply system is suitable for irregularly growing towns?
(A) Ring system
(B) Tree system
(C) Radial system
(D) Grind iron system
151. Dual system is also known as :
(A) Gravity system
(B) Combined gravity and pumping system
(C) Direct pumping system
(D) Radial system
152. In base exchange process :
(A) High turbidity water can use
(B) Filtration is not required
(C) No sludge is formed
(D) Sludge is formed
153. Aeration process is used for removal of :
(A) Dissolved gasses tastes and odours
(B) Suspended matters
(C) Fine Suspended matters
(D) Microorganisms and colloidal matters
154. How to remove scale formation from the water heater?
(A) Applying sodium chloride
(B) Applying diluted hydrochloric acid
(C) Applying diluted sulphuric acid
(D) Applying concentrated nitric acid
155. The water storage tank at elevated position are called :
(A) Over head tank
(B) Surface tank
(C) Common tank
(D) Sump
156. Pipes which carrying silage water from baths are called?
(A) Soil pipe
(B) Waste pipe
(C) Rain water pipe
(D) Siphon pipe
157. The permissible dosage of chlorine in drinking water is :
(A) 02.5 to 2.10 mg/liter
(B) 1.05 to 1.10 mg/liter
(C) 01.10 to 2.10 mg/liter
(D) 0.05 to 0.10 mg/liter
158. Fitting which used for connecting service connection no water main is?
(A) Union ferrule
(B) Reduce and cupping
(C) Reduce and valve
(D) Reduce and union
159. On some wooden beam, some where a little part may be come out while cutting or hammering, what is the name of that part?
(A) Grain
(B) Knot
(C) Shake
(D) Planks
160. Where the manholes are provided in straight lengths of pipe Lines?
(A) At 50 meter intervals
(B) 40 meter intervals
(C) 30 meter intervals
(D) 20 meter intervals