Test: Thermal Conductivity of Different Materials - Mechanical Engineering MCQ

Asphalt concrete have three main structural elements i.e. aggregates, binder and the contact layer between them. It is soft at high temperatures but brittle at low temperatures.

Thermal conductivity of silver is 410 W/m degree while that of copper, glass and earth are 385 W/m degree, 0.75 W/m degree and 0.138 respectively.

This is having low thermal conductivity because of high intramolecular interactions between their outer edge molecules.

Thermal conductivity of glass wool is 0.03 W/m degree while that of furnace, wool and saw dust are 0.30 W/m degree, 0.052 W/m degree and 0.07 respectively.

Coal is composed primarily of carbon along with variable quantities of other elements such as hydrogen, sulfur, oxygen and nitrogen.

It is a soft material that grows in protective capsule, around the seeds of cotton plants.

Thermal conductivity of aluminum is 225 W/m degree while that of brass, cast iron and steel are 107 W/m degree, 55 W/m degree and 20 respectively.

It is a sweet fruit that has very low thermal conductivity in order to prevent it from damage.

Frozen water in the form of an ordinary household ice cube. The white zone in the center is the result of tiny air bubbles.

Thermal conductivity of freon is 0.0083 W/m degree while that of ash, ice and water are 0.12 W/m degree, 2.25 W/m degree and 0.55 respectively.