Explanation

A dummy activity in project management shows dependency but consumes no time or resources.

Used in network diagrams (like CPM/PERT) to maintain logical sequencing.

Explanation

Approximately 500 standard bricks are required for 1 cubic meter of dry brick masonry.

Actual number may vary slightly depending on mortar thickness.

Explanation

General plastering thickness is usually 20–25 mm for walls.

Ensures proper coverage, durability, and smooth finish.

Explanation

One standard 50 kg bag of cement occupies ≈ 1.25 cubic feet.

Used in concrete mix calculations in civil engineering.

Explanation

A skew bridge crosses the water or obstacle at an angle other than 90°.

Designed to accommodate alignment of roads or rivers.

Explanation

Extra length for a hook in steel reinforcement is taken as 5 times the bar diameter (5D).

This ensures proper anchorage and bond with concrete.

Explanation

Principal rafter is the main rafter in a roof truss that carries the load.

It transfers the roof load to the supports efficiently.

Explanation

Stability is the ability of a structure or member to maintain equilibrium under applied loads.

Loss of stability leads to buckling or collapse, even if material strength is sufficient.

Explanation

d = 8 ft => r = 4 ft

A = πr² = π(4)²

= 16π ≈ 50.24 ft²

Explanation

Specific weight (density) of steel ≈ 7850 kg/m³.

Commonly used in structural and mechanical engineering calculations.