This set of Civil Engineering Drawing Multiple Choice Questions & Answers focuses on “Analysis of Rates for Sanitary and Water Supply”.
1. The Indian Water Closet shall not consist of _____________
a) the brickbat lime or cement concrete required to be filled around the entire space of the W.C. pan properly rammed and consolidated without damaging the pan
b) C.I. soil waste pipe bend with cleaning cap extending upto Gulley Trap Chamber beyond the “P” trap
c) best Indian make Water Closet pan of 127mm (i.e. 05″) size with “P” or “S” trap in white glazed earthenware
d) low level flushing cistern of 15 litres capacity ‘Fordham’ or equivalent make, porcelain enamelled with all fittings and accessories with 32 mm flush chromium plates flush bend
View Answer
Explanation: Best Indian make Water Closet pan of 630mm (i.e. 25″) size with “P” or “S” trap in white glazed earthenware.
2. For urinals which of the below options will not be present?
a) Vitreous Chinaware urinal stall of 11p type as specified in the material schedule
b) 5 litre capacity C.I automatic flushing cistern with all accessories
c) 12 mm dia. C.P. brass, flush pipe
d) 2mm Chromium plated brass waste coupling
View Answer
Explanation: 32mm Chromium plated brass waste coupling.
3. For sanitary purpose galvanised iron pipes and specials shall be of class “C” heavy type, first quality and shall conform to IS 1239 be used.
a) True
b) False
View Answer
Explanation: All pipes and fittings shall be approved by the Owner / Consultants prior to installation. Cast Iron soil waste pipes & specials shall be of approved quality and shall conform to IS 1729. These pipes shall be used for soil waste, vents and anti-sliphonage. Asbestos cement pipes and specials shall be approved make and shall conform to IS1626. These pipes shall be used wherever they are exposed and non-vertically.
4. For the wash basin, all the accessories wherever necessary shall be painted in 2 coats or more with approved enamel paint.
a) True
b) False
View Answer
Explanation: i) 12mm chromium plated tap with appropriate marks for cold or hot water.
ii) 32 mm chromium plated brass waste coupling with rubber plug and chain.
iii) 12mm p.v.c. connector with wiped joints & 15mm chromium plated brass stop cock.
5. This shall be of Chromium plated brass and approximately 25mm in diameter.
a) True
b) False
View Answer
Explanation: Shower Rose shall be of Chromium plated brass and approximately 125mm in diameter with C.P. brass arm of appropriate length and wall flange etc., wherever necessary.
6. The mirror shall be mounted on Asbestos sheets or 60mm plywood with brass counter sunk screws with washers and detachable G.P. caps.
a) True
b) False
View Answer
Explanation: The mirror shall be mounted on Asbestos sheets or 60mm plywood with brass counter sunk screws with washers and detachable G.P. caps.
7. The maximum distance between manholes shall be 30 meter unless specially permitted otherwise.
a) True
b) False
View Answer
Explanation: In addition, at every change of alignment gradient or diameter there shall be a manhole or inspection chamber. The distance between manhole or inspection chamber and gully chamber shall not exceed 6 metres unless desired otherwise. Manhole shall be constructed so as to be watertight under test. The bending at the sides shall be carried out in such a manner as to provide no lodgement for any splashings in case of accidental flashing of the chamber.
8. Laying of pipes shall proceed up grade of slopes. The error of grade shall not be rectified by packing up earth underneath the pipes.
a) True
b) False
View Answer
Explanation: If required, concrete shall be used for packing. The ends of the pipes shall be kept closed to keep dirt, mud and foreign materials, out. Adequate provision shall be made to prevent floating of pipe in the event of flooding of trenches. The body of the pipe for its entire length shall rest on an even bed in the trench and places shall be excavated to receive the collar for the purpose of jointing.
9. Anti-siphonage pipe is connected to __________
a) top of P trap W.C
b) main soil pipe
c) bottom of P trap W.C
d) side of water closet
View Answer
Explanation: A vent is open at top and bottom, to facilitate exit of foul gases. It is carried at least one meter higher than the roof level. Rain water pipe: it is a pipe which carries only the rain water. Anti-siphonage pipe: it is pipe which is installed in the house drainage to preserve the water seal of traps.
10. The diameter of a domestic sewer pipe laid at gradient 1 in 100 is recommended to __________
a) 100 mm
b) 150 mm
c) 210 mm
d) 400 mm
View Answer
Explanation: A sanitary sewer or “foul sewer” is an underground carriage system specifically for transporting sewage from houses and commercial buildings through pipes to treatment facilities or disposal. Sanitary sewers are part of an overall system called a sewage system or sewerage.
Sewage may be treated to control water pollution before discharge to surface waters. Sanitary sewers serving industrial areas also carry industrial wastewater.
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