Correct option is d)

The diatomaceous earth is used to insulate boilers and steam pipes because it is cheap.


The diatomaceous earth is a naturally occurring sedimentary rock that is composed of diatoms, which are microscopic algae-like organisms. These diatoms have a unique cell wall structure made of silica, which gives the diatomaceous earth its insulating properties.

Insulating Properties of Diatomaceous Earth:

• The cell walls of diatoms are made of silica, which is a poor conductor of heat. This means that diatomaceous earth has low thermal conductivity, making it an excellent insulator.

• The porous structure of diatomaceous earth traps air pockets within its particles. These air pockets act as insulating barriers, reducing the transfer of heat.

• The high porosity of diatomaceous earth also increases its thermal resistance, further enhancing its insulating properties.

Advantages of Using Diatomaceous Earth for Insulation:

• Cost-Effective: One of the main reasons for using diatomaceous earth as an insulating material is its affordability. It is readily available and inexpensive compared to other insulating materials, making it a cost-effective option for insulating boilers and steam pipes.

• Heat Resistance: Diatomaceous earth can withstand high temperatures without degrading or losing its insulating properties. This makes it suitable for use in applications where heat insulation is required, such as in boilers and steam pipes.

• Non-Toxic and Environmentally Friendly: Diatomaceous earth is a non-toxic and environmentally friendly material. It does not release harmful gases or particles when heated, making it a safe choice for insulation.

Conclusion:

The diatomaceous earth is used to insulate boilers and steam pipes because it is cheap and has excellent insulating properties. Its unique cell wall structure made of silica, along with its porous nature, allows it to effectively trap air pockets and reduce heat transfer. Additionally, diatomaceous earth is cost-effective, heat-resistant, and environmentally friendly, making it a preferred choice for insulation in various industrial applications.

D is the correct option