Basic properties of materials

What is the approximate density (kg/m^3) of normal weight concrete?

• 3000

• 2400

• 1500

• 24

What is the density (kg/m^3) of mild carbon steel?

• 2400

• 5000

• 7850

• 9000

Given a sample of air-dried sand of weight (Wad) 1000g. The oven-dried weight (Wod) is 995g and the saturated surface-dried weight (Wssd) is 1011g. What is the absorption (%) of the sand?

• 1.0%

• 1.1%

• 2.1%

• 1.61%

Given another sample of air-dried coarse aggregate of weight (Wad) 1000g. The oven-dried weight (Wod) is 990g and the saturated surface-dried weight (Wssd) is 1018g. What is the moisture content (%) of the air-dried sample?

• 2.83%

• 1.10%

• 1.01%

• 1.20%

What is the approximate specific gravity of normal sand?

• 2.65

• 2.9

• 3.15

• 2.4

What is the specific gravity of Portland cement?

• 2.65

• 3.15

• 2.4

• 3.6