This set of Building Construction Multiple Choice Questions & Answers (MCQs) focuses on “Plumbing for Buildings – Water Distribution System – 1”.
1. Which of the following is not a component of plumbing water supply system?
a) Washbasin
b) Water supply and distribution pipes
c) Valves
d) Storage tanks
View Answer
Explanation: The plumbing system consists of the entire system of piping fixtures which are used for the supply and drainage of water. The various components of plumbing water supply system are water supply and distribution pipes, valves, storage tanks, etc.
2. Which of the following is not a component of the plumbing drainage system?
a) Water closets
b) Taps
c) Vent pipes
d) Urinals
View Answer
Explanation: The different components of the plumbing drainage system are water closets, vent pipes, urinals, septic tanks, soil waste pipes, traps, etc. Taps form the part of plumbing water supply system.
3. According to the Indian Standard recommendations, a water requirement of _______ per head per day is assumed for residential buildings.
a) 50 litres
b) 115 litres
c) 135 litres
d) 160 litres
View Answer
Explanation: According to the Indian Standard recommendations, a water requirement of 135 litres per head per day is assumed for residential buildings. Out of this, 45 litres may be taken for flushing needs while the rest 90 litres are taken for domestic purposes.
4. Light gauge copper tubes are used for general purpose work where the pressure is not more than 0.15 N/mm2.
a) True
b) False
View Answer
Explanation: Copper water service pipes are of two types. These are light gauge and heavy gauge. Light gauge copper tubes are used for general purpose work where the pressure is not more than 0.15 N/mm2.
5. Which of the following is not true about lead pipes?
a) Lead pipes are highly resistant to corrosion
b) They have a low hydraulic coefficient of flow
c) Lead pipes are highly flexible
d) When lead goes into solution, it has a cumulative poisoning effect
View Answer
Explanation: Lead pipes have many advantages. They have a high hydraulic coefficient of flow and are highly resistant to corrosion. Lead pipes are highly flexible. Still, it is not preferred because when the lead goes into solution, it has a cumulative poisoning effect.
6. Which of the following is not true about plastic pipes?
a) Plastic pipes are cheaper than the metal pipes
b) Plastic pipes are light in weight
c) Plastic pipes can be installed with ordinary tools
d) Plastic pipes are corrosive
View Answer
Explanation: Plastic pipes are light in weight. Ordinary tools are used to install plastic pipes. Plastic pipes are non-corrosive and are cheaper than metal pipes.
7. The diameter of main service pipe may vary from ___________
a) 2-15 mm
b) 12-40 mm
c) 50-75 mm
d) 60-80 mm
View Answer
Explanation: The diameter of the main service pipe may vary from 12-40 mm. The materials which are commonly used for service pipes are copper, lead, galvanised iron and polythene.
8. ____________ is used to measure flows to domestic buildings.
a) Rain gauge
b) Water tank
c) Drainpipe
d) Water meter
View Answer
Explanation: Water meter is used to measure flows to domestic buildings. A water meter should be easy to maintain and repair and it should measure and register both large and small flows accurately.
9. ____________ is used to measure the flow velocity across a cross-section with a known area.
a) Inferential meter
b) Anemometer
c) Speedometer
d) Barometer
View Answer
Explanation: There are generally two types of meters used in water distribution systems. These are inferential meter and displacement meter. The inferential meter is used to measure the flow velocity across a cross-section with a known area.
10. Inferential meters can be used for both low and high flows.
a) True
b) False
View Answer
Explanation: Inferential meters are used only for high flows. They are also known as velocity meters. For relatively low flows, displacement meters are used.
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