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WorksheetsDAY 29 WORKSHEET ITI -BC - Damp Proofing & TPC
Total questions: 15
Worksheet time: 10mins
The minimum thickness of hot bitumen layer used in a damp proof course at plinth level should never be less than —
1 mm
2 mm
3 mm
5 mm
In membrane damp proofing, which of the following combinations gives the highest durability?
Single layer of asphalt
Cement concrete 1 : 2 : 4
Lead foil sandwiched between asphalt or bituminous felt
Polythene sheet
Guniting is a process where —
Cement mortar (1 : 3) is applied under high pneumatic pressure
Lime mortar is brushed over plaster
Tar felt is rolled over surface
Paint is sprayed under low pressure
When lead sheets are used for DPC, their weight per square metre should not be less than —
100 N/m²
150 N/m²
200 N/m²
250 N/m²
Which among the following is not a suitable material for a permanent DPC in foundations?
Cement concrete (1 : 2 : 4)
Plastic sheet 0.5 mm thick
Bituminous felt
Mastic asphalt
Integral treatment by adding compounds like Pudlo and Impermo to mortar ensures complete waterproofing even if curing is neglected.
True
False
Efflorescence is a symptom of dampness caused by soluble salts crystallizing on surfaces.
True
False
Assertion (A): Cavity-wall construction effectively prevents the penetration of moisture. Reason (R): The continuous air gap between two leaves acts as a barrier to heat and dampness.
(A) and (R) are both true and (R) is the correct explanation of (A)
(A) is true but (R) is false
(A) is false but (R) is true
(A) and (R) are both false
The mix proportion commonly used for cement concrete DPC at plinth level is (a) .
Termite-resistant chemicals such as _________ and _________ are used during pre-construction soil treatment.
(a)
The minimum thickness of polythene sheet used for temporary DPC is (a) mm.
Fire-resistant walls should be at least (a) cm thick when constructed with bricks.
The ratio of lime : sand in fat-lime plaster and hydraulic-lime plaster are respectively _________ and _________.
(a)
Match the following
A. Hot bitumen→1. Semi-rigid material
B. Mastic asphalt→2. Cheap but not permanent
C. Metal sheets (Copper/Lead)→3. Flexible material
D. Plastic sheet→4. High tensile strength material
A–3, B–1, C–2, D–4
A–1, B–3, C–4, D–2
A–3, B–1, C–4, D–2
A–3, B–4, C–1, D–2
Material made black polythene having thickness of about (a)
