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WorksheetsDay 31-Oct 20-Btech-worksheet-Mortar
Total questions: 15
Worksheet time: 9mins
Bulking of sand is maximum when —
Sand is completely dry
Moisture content is above 12%
Moisture is around 5–8%
Immersed fully in water
Surkhi mortar is unsuitable for plastering mainly because —
It contains calcareous impurities
It disintegrates after exposure to weather
It increases setting too much
It causes excessive shrinkage
In gauged mortar, lime serves primarily to —
Increase density
Improve plasticity
Reduce water retention
Increase shrinkage
The manufacturing of lime mortar in small scale is carried out by —
Pug milling
Kneading
Pressing
None
Fine sand exhibits more bulking compared to coarse sand.
True
False
Fat lime mortar is suitable for use in continuously water-logged foundations.
True
False
Assertion (A): Surkhi mortar is commonly used in foundation work. Reason (R): Surkhi increases resistance to disintegration under sub-soil moisture conditions.
Both A and R are true and R is correct explanation
Both A and R are true but R is NOT the correct explanation
A true, R false
A false, R true
The fineness modulus of medium sand should lie between (a) .
The increase in volume of sand due to surface moisture is called (a) .
Cement mortar for DPC is generally used in the proportion (a) .
The bulk density of lightweight mortar is less than (a) kN/m³.
The process of adding cement to lime mortar to improve quality is termed (a) .
To detect the presence of organic impurities in sand, solution of (a) is used.
The binding material used in surkhi mortar is (a) .
Match the following
Lime mortar
Require 2-3 time sand for shrinkage Ctrl
Surkhi mortar
Not suitable for plastering
Cement mortar
Suitable for waterlogged foundations
Fire-resistant mortar
Used for high temperature resistance
