Construction Materials Questions and Answers – Water Leakage

This set of Construction and Building Materials Multiple Choice Questions & Answers (MCQs) focuses on “Water Leakage”.

1. The term _________ in the buildings is used to mean the coming out of water from components like walls and floors of the buildings.
a) Damp proofing
b) Termite proofing
c) Water proofing
d) Dampness
View Answer

Answer: c
Explanation: The Water leakage in the buildings is the most common problem actually in all types of building such as the residential flats, hospitals, offices, School buildings, etc. It is observed in the building Industry that 99% of water leakage problems are concentrated on the terrace roofs and in the toilets.

2. The remedy lies in _________ initially with epoxy mortar or at least later stage while repairing the causes of the problems due to aging.
a) Push cocks
b) Filling of joints
c) Design of floor slab
d) Plumbing
View Answer

Answer: b
Explanation: The joints in the drainage system should be filled with rich cement mortar. Due to aging, the strength of cement mortar deteriorates resulting in Leakages through the cracked Joints. The remedy lies in feeling such joints, initially with epoxy resin mortar or at least at a later stage while repairing the same.

3. For ordinary buildings of cheap construction, the ________ of roof surface is done at the time of laying cement concrete.
a) Finishing
b) Brushing
c) Plastering
d) Painting
View Answer

Answer: a
Explanation: The finishing of flat roof is carried out in cement mortar of proportion 1:4 i.e. one part of cement to four parts of sand by volume.
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4. In __________ method, the surface of RCC slab is kept rough and on this surface a layer of concrete is laid.
a) Mastic Asphalt
b) Finishing
c) Bedding Concrete
d) Finishing
View Answer

Answer: c
Explanation: In bedding concrete and Flooring, the concrete maybe brickbat lime concrete 1:2:4 or brickbat cement concrete 1:6:12 or 1:5:10. The thickness of concrete layer is about 100 mm. The surface of bedding concrete is provided by suitable flooring such as tiles, terrazzo, Indian Patent stone, etc.

5. In _________ method, a layer of hot mastic Asphalt is laid on the roof surface.
a) Dampness
b) Termite proofing
c) Mastic Asphalt
d) Roofing
View Answer

Answer: c
Explanation: The jute cloth is spread over the layer of hot mastic Asphalt. Then one more layer of mastic Asphalt is applied so that the jute cloth is sandwiched between two layers of mastic Asphalt. The sand is then Sprinkled over the entire surface of roof.
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6. When compound like ____________ is added to cement during construction, it prevents seepage, leakage and damp cause by capillary absorption.
a) Puldo
b) POP
c) Steel
d) Chlorine
View Answer

Answer: a
Explanation: When Compound like Pludo, impermo, etc. Are added to cement during construction, it prevents seepage, leakage and damp cause by capillary absorption of the moisture in cement, mortar and concrete. The quantity of water proofing compound to be added is also very small, set 2% and does a bag of cement will require only about 10 N of such compounds.

7. For the overhead RCC ___________ it should be seen that the permissible limits of stresses relating to resistance to cracking are not exceeded.
a) Relief valves
b) Water tanks
c) Push cocks
d) Taps
View Answer

Answer: b
Explanation: The bottom slab of overhead water tank should be placed 1 metre above the roof slab. It will facilitate proper centring during construction and also for the location and repairing the leakage after construction.
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8. The joints in the _________ of WC seats and nahni trap should be filled with rich cement mortar and cured for 7 days.
a) Plumbing
b) Spouts
c) Traps
d) Toilet
View Answer

Answer: a
Explanation: If curing is not done properly come on the rich cement mortar gets crack and leads to leakage. If possible, one piece P trap should be used to reduce one joint in the drainage system and it should be fixed before waterproofing of the WC Block is started.

9. The concussive or violently shaking type fitted _______ for the flushing of WC pans leads to vibration.
a) Spouts
b) Slab
c) Toilets
d) Push cocks
View Answer

Answer: d
Explanation: The concussive or violently shaking type push cocks fitted for the flushing of WC pans lead to vibration and consequently in the joints in the drainage system get dislodged and lose water tightness. It is therefore desirable to provide wheel valve or other suitable valve which do not cause vibration.
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10. _______ is necessary to provide at suitable vertical distance in multi storage buildings.
a) Push cocks
b) Water tanks
c) Wheel valve
d) Relief valves
View Answer

Answer: d
Explanation: It is necessary to provide brake pressure relief valve at suitable vertical distance in multi storey buildings to prevent seepage of water through the plumbing system.

Sanfoundry Global Education & Learning Series – Construction and Building Materials.

To practice all areas of Construction and Building Materials, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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