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
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
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.
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.
Explanation: a) 12mm chromium plated tap with appropriate marks for cold or hot water.
b) 32 mm chromium plated brass waste coupling with rubber plug and chain.
c) 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.
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.
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.
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. Sanitary plumbing includes the installation of appliances such as dishwashers and washing machines; the replacement or repair of taps, ball valves and plugs.
Explanation: Sanitary plumbing does not includes the installation of appliances such as dishwashers and washing machines; the replacement or repair of taps, ball valves and plugs.
9. Laying of pipes shall proceed up grade of slopes. The error of grade shall not be rectified by packing up earth underneath the pipes.
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.
10. 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
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.
11. 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
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.
12. Connecting pipe should be_______ mm minimum diameter.
Explanation: It may be of R.C.C, Hume pipe, cast iron pipe, S.W. Inlet and outlet may be made through T-junction pipe or baffle wall of precast R.C.C. may be provided at a distance 1/5 of length of the septic tank so that the inlet sewage may not disturb the working of the tank.
13. A _________is a type of toilet that collects human faeces in a hole in the ground.
b) septic tank
c) pit toilet
Explanation: A pit latrine or pit toilet is a type of toilet that collects human faeces in a hole in the ground. They use either no water or one to three litres per flush with pour-flush pit latrines. When properly built and maintained they can decrease the spread of disease by reducing the amount of human faeces in the environment from open defecation. This decreases the transfer of pathogens between faeces and food by flies.
14. The _______ are used for preventing foul gas from sewers to back flow in the house.
a) air freshners
c) naphthalene balls
Explanation: In plumbing, a trap is a device which has a shape that uses a bending path to capture water to prevent sewer gases from entering buildings, while allowing waste to pass through. In refinery applications, traps are used to prevent hydrocarbons and other dangerous gases from escaping outside through drains.
15. ________ traps are used for receiving waste water from kitchen sinks, baths and rain and surface water from house.
Explanation: At the top of the trap cast iron grating is provided to prevent entry of solid matters. The gully traps may be either of stone ware or caste iron.
Sanfoundry Global Education & Learning Series – Civil Engineering Drawing.
To practice all areas of Civil Engineering Drawing, here is complete set of 1000+ Multiple Choice Questions and Answers.