Construction Materials

Which of the following is not an advantage of brick?

• Easy to handle

• Can be finishes without plastering

• High strength

• Resisting to acid and alkali

What is the difference between cement and concrete?

• concrete has stones mixed in
• concrete has sand mixed in
• cement is a different color
• cement needs more water to mix it

Which of the following materials are used to make concrete?

• bricks bats,lime, sand ,water

• flyash,lime,water

• sand,stones, lime,water

• cement, coarse aggregate, fine aggregate, water

Moisture content of wood normally represent in percentage (%). What is the correct formula to calculate moisture content of wood?

•  $\frac{Weight\ of\ water\ in\ wood}{Weight\ of\ dry\ wood}\times100\%$  

•   $\frac{Weight\ of\ water\ in\ wood}{Weight\ of\ wet\ wood}\times100\%$ 

•  $\frac{Weight\ of\ dry\ wood}{Weight\ of\ water\ in\ wood}\times100\%$  

•  $\frac{Weight\ of\ wet\ wood}{Weight\ of\ water\ in\ wood}\times100\%$  

The picture above shows a type of steel. What is the correct name?

• Mild Steel (R)

• High yield steel (Y)

The graph above shows the result after a testing for steel. What is property of steel we can learn from about testing.

• Fire Resistance

• Strength & Ductility

• Shrinkage and Expansion

Which of the followings are the types of portland cement.

(Answers can be more than one)

• Normal portland cement.

• Low heat portland cement

• Rapid hardening portland cement

• High alumina portland cement

__________ is important influence on the quality of concrete produced.

• Percentage of material

• Quantity of aggregates

• Type of cement

• Water-cement ratio

________________ is one of the admixture of concrete that helps to accelerate setting and early-strength development.

• Water-reducing admixtures

• Retarding admixtures

• Accelerating admixtures

• Air Entraining Admixtures

Which are the aspects we should consider as an engineer when choosing the right materials for construction?

• Costing of materials

• Quantity of materials

• Quality of materials

• Efficiency of materials