Pakistan MCQs

Compaction increases dry density and strength while reducing compressibility.
It is achieved using rollers, rammers, or vibratory equipment.

The slump test provides a quick indication of consistency and workability.
It is widely used for ordinary concrete in the field.

Curing allows cement hydration to continue.
Proper curing improves strength, durability, and crack resistance.

Segregation produces a nonuniform concrete mixture.
It may result from poor proportioning, excessive vibration, or improper handling.

Bleeding occurs as solid particles settle and water rises.
Excessive bleeding can weaken the surface and bond.

Aggregates usually form the largest volume fraction of concrete.
They reduce cost and influence strength, shrinkage, and workability.

A foundation spreads building loads to soil or rock.
It must limit bearing failure and excessive settlement.

Shallow foundations transfer loads at relatively small depths.
Examples include isolated, strip, and raft foundations.

Excess water increases porosity after hardening.
A lower suitable water-cement ratio generally improves strength and durability.

Workability describes how easily fresh concrete can be handled without segregation.
Slump and compaction-factor tests are used to assess it.

Division and multiplication have equal priority and are performed left to right.
So 48 ÷ 6 = 8, and 8 × 3 = 24.

Multiplication is performed before addition.
Thus, 3 × 4 = 12 and 5 + 12 = 17.