Worksheets09/01/2026 AE_Mortar
Total questions: 10
Worksheet time: 5mins
A mason uses very fine sand for lime mortar and observes faster setting compared to coarser sand. The most appropriate explanation is:
Fine sand increases the lime content in mortar
Fine sand absorbs more water, accelerating hydration
Fine sand provides greater pore surface for CO₂ absorption
Fine sand reduces shrinkage stresses in mortar
Which situation will result in the maximum error in volume batching of mortar, if no correction is applied?
Dry coarse sand
Wet coarse sand
Dry fine sand
Moist fine sand
A mortar requires longer working time than cement mortar but higher strength than lime mortar. Which mortar best satisfies this requirement?
Lime mortar
Cement mortar
Gauged mortar
Surkhi mortar
A sand sample passes BIS No. 480 sieve but also passes BIS No. 15 sieve in significant quantity. This sand is likely to:
Increase strength of mortar
Cause excessive shrinkage
Improve workability without strength loss
Reduce bulking effect
A mortar is required for lining a furnace wall. Which indirect reasoning leads to correct binder selection?
Lime gives higher temperature resistance
Cement gives rapid strength
Aluminous cement resists high temperature degradation
Gypsum provides smooth finish
Assertion (A): Gauged mortar has a longer consumption time than cement mortar. Reason (R): Lime in gauged mortar retards the hydration of cement.
Both A and R are true, and R explains A
Both A and R are true, but R does NOT explain A
A is true, R is false
A is false, R is true
Assertion (A): Surkhi mortar is hydraulic in nature. Reason (R): Surkhi reacts with lime in the presence of water to form cementitious compounds.
Both A and R are true, and R explains A
Both A and R are true, but R does NOT explain A
A is true, R is false
A is false, R is true
Assertion (A): Sea sand is unsuitable for reinforced mortar work even if properly graded. Reason (R): Soluble salts present in sea sand promote corrosion of steel.
Both A and R are true, and R explains A
Both A and R are true, but R does NOT explain A
A is true, R is false
A is false, R is true
Assertion (A): Lightweight mortar is selected primarily based on its binder. Reason (R): Lightweight mortar has a bulk density less than 15 kN/m³.
Both A and R are true, and R explains A
Both A and R are true, but R does NOT explain A
A is true, R is false
A is false, R is true
Assertion (A): Bulking correction is unnecessary when sand is used by weight. Reason (R): Bulking affects apparent volume, not mass of sand.
Both A and R are true, and R explains A
Both A and R are true, but R does NOT explain A
A is true, R is false
A is false, R is true
