Construction Test 3

Question 1

The wedge-shaped bricks used to create the arch ring are known as

Accepted Answer

Voussoirs

Answer

Voussoirs are the fundamental components of an arch. They are precisely cut, wedge-shaped blocks, usually made of stone or brick, that form the curved structure. These blocks are arranged with radiating joints, transferring the compressive forces of the arch outwards to its supports, with the central keystone locking them into place.

Question 2

For isolated foundations on clayey soils, the overall settlement should not exceed _______.

Accepted Answer

65 mm

Answer

For isolated foundations built on clayey soils, the maximum permissible total settlement is generally limited to 65 mm. This standard is established to prevent excessive structural damage, tilting, or functional issues within the building caused by uneven or significant ground movement. Different soil types and foundation designs have specific settlement criteria.

Question 3

_______ is the name for the foundation, which consists of a thick slab of reinforced cement covering the entire region to support highly concentrated structural loads.

Accepted Answer

Raft footing

Answer

A raft footing, also known as a mat foundation, is a large, continuous slab of reinforced concrete that covers the entire footprint of a structure. This type of foundation is employed when individual footings would cover more than half the building area, or when the soil's bearing capacity is low. It effectively distributes heavy, concentrated structural loads over a much larger area, reducing the pressure exerted on the underlying soil.

Question 4

The depth of exploration for each floor (or storey) of a building should be _______.

Accepted Answer

3 meters

Answer

The depth of soil exploration for a building's foundation is critical for understanding the subsurface conditions. A common guideline for preliminary investigations suggests a minimum exploration depth of 3 meters for each floor or storey of the building. This ensures that the investigation extends sufficiently below the proposed foundation level to identify any problematic soil layers, groundwater, or geological features that could affect the structure.

Question 5

Choose the appropriate statement from the list below:

Accepted Answer

The index value known as fineness modulus expresses the relative sizes of both coarse and fine aggregates.

Answer

The fineness modulus is an empirical index value used in concrete technology to describe the average size of aggregate particles. It is derived from the sieve analysis of both coarse and fine aggregates, providing a quick measure of their overall fineness or coarseness. This value is crucial for concrete mix design, helping to ensure optimal workability, strength, and economy of the mix.

Construction Practice Test

Construction Practice Test

Construction Test 3