For 12 mm thick cement plastering 1 : 6 on 100 sq.m new brick work, the quantity of cement required, is
A. 0.200 m3
B. 0.247 m3
C. 0.274 m3
D. 0.295 m3
Answer: Option C
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A. Mid-section formula
B. Trapezoidal formula
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Size, capacity and materials need be specified for
A. Bib-cocks
B. Stop-cocks
C. Ball valves
D. All the above
The expected out turn of 12 mm plastering with cement mortar is
A. 2.5 sq m
B. 4.0 sq m
C. 6.0 sq m
D. 8.0 sq m
A. Excavation
B. Surface dressing
C. Cutting
D. Surface excavation
Net volume of mortar=100*12/1000=1.2cub.m
Add 30%mortar for joint filling =30/100*1.2+1.2=1.56 this is the total wet vloume
Now add 30%to wet vloume to obtain dry volume of mortar hence
Dry vloume =30/100*1.56+1.56=2.028
And now volume of cement =2.028/1+6*1=0.274
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