Density

Question 1

What is a beam?

Answer 1

A horizontal structural member spanning between Stanchions, walls, columns etc in a building structure. They are required to be of adequate strength to resist applied loading.

Question 2

Define Density?

Answer 2

Density is the mass per unit volume of a substance\material. Density is expressed in g/cm³ or kg/m³ with mass divided by volume.

Question 3

What is the formula for calculating density?

Answer 3

Density = mass/volume

Question 4

What is meant by Relative Density?

Answer 4

The density of a material compared to the density of water. We use this number (without a unit) to check purity and if free from other substances.

Question 5

What is Capillary action?

Answer 5

Is water that gets drawn through smaller openings.

Question 6

What is formula for Relative Density?

Answer 6

Relative Density = Density of material / Density of Water

Question 7

Define Structure of Materials

Answer 7

It is how particles are arranged in that material. Some materials particles are packed closely together ie steel while other have

Question 8

Name 5 types of materials for DPC?

Answer 8

PVC, Malthoid, Bitumen impregnated felt, Slate, Dense pressed bricks

Question 9

What is meant by porosity?

Answer 9

When materials mass is not solid throughout. Porosity is the amount of pores or voids (air spaces) present in a material. A material that is porous has many pores and absorbs water.