Explanation

Declination is the angle between the geographic (true) north and magnetic north.

It helps in correcting compass readings for accurate navigation and surveying.

Explanation

A Gunter’s chain is a measuring device used in surveying, traditionally 66 feet long.

It is divided into 100 links, each 0.66 ft, for easy land measurement.

Explanation

Hooke’s law states that within the elastic limit, stress is directly proportional to strain.

It is the fundamental law describing elasticity in materials.

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.