Explanation

A rowlock is a brick laid on its long edge with the short end (header) visible on the wall face.

It is commonly used for wall capping, sills, or decorative features.

Explanation

A metal lath is a steel mesh that provides a strong base for plaster or stucco to adhere to.

It helps in preventing cracks and ensures uniform application of plaster.

Explanation

Strain = Change in length / Original length

= 3 mm / 3000 mm

= 0.003 / 3

= 0.001

Explanation

Moment of force about a point measures the tendency of a force to rotate a body about that point.

It is mathematically the product of force and perpendicular distance from the point, which is called the first moment of area in mechanics.

Explanation

Cavity walls reduce moisture penetration by providing an air gap between two wall layers.

The cavity acts as a barrier to dampness and improves thermal insulation.

Explanation

A master plan provides the complete long-term overview for the development of a town or city.

It includes zoning, roads, public utilities, housing, and future expansion.

Explanation

The calcium carbide (Speedy moisture tester) method gives rapid on-site determination of water content.

It works by reacting calcium carbide with soil moisture to produce acetylene gas, indicating moisture percentage.

Explanation

In low heat cement, the percentage of tricalcium aluminate (C₃A) is reduced to about 5%.

Lower C₃A helps reduce heat of hydration, making it suitable for mass concrete works.

Explanation

Thermocole has very low thermal conductivity, so it’s excellent for heat insulation.

Commonly used in refrigerators and air-conditioning buildings to reduce heat transfer.

Explanation

A revised estimate is prepared when the sanctioned cost exceeds the original estimate by more than 5%.

It reflects changes due to rate variation, quantity change, or design modification.