Answer the following questions 6 Which one of the following

Answer the following questions:

6. Which one of the following statements is false?

1 Clinker bricks are calcium silicate bricks.

2 Clinker bricks are formed because the heat of the fire is uneven. The bricks closest to the fire will become clinker bricks.

3 Bricks on the outer shell of the mound fire are often under fired.

4 Bricks on the outer shell of the mound fire will tend to absorb moisture and will break down more easily.

7. Leaf is referred to as the width of a completed masonry wall.

1 True

2 False

8. A common problem with South African bricklayers is that they do not properly fill perpends with mortar.

1 True

2 False

9. A cheap solution when a house is built on expandable clays is to lower the foundations to a level where the moisture content in the clay does not vary much.

1 True

2 False

10. Which one of the following statements is true?

1 A column is a load bearing masonry member in which the larger dimension does not exceed 4 times the height of the member

2 The lateral support will restrain any masonry element against vertical movement

3 The shear span is the ratio of the max design bending moment to the maximum design load

4 All of the above

5 None of the above

Solution

6.  Clinker bricks are calcium silicate bricks.-this is the false statement as clincker bricks are produced when wet bricks are produced to excessive heat during firing process where calcium silicate bricks are made of sand and lime popularly known as sand lime bricks.

7.true,leaf means width of one brick thickness therefore a single leaf masonry is defined as small masonry units joined togather.

8.false, several interviews were conducted on brick layers and workers in westcape province although south africa is a developing country, socially and economically backward the workers(especially brick layers) are strongest and efficient workers. which was submitted in many documentaries.

9.true,the best way is expand building foundation beneath the zone of water content fluctuations the reason is to provide skin friction adhesion and to resist upward movement when soil surface become wet and began to swell

10.none of the above as The lateral support will restrain any masonry element against sidewys movement and shear span is the zone where shear force is zero and is defined as the distance from point of application of concentrated force to which reaction force