List three engineering applications each for which the follo

List three engineering applications each for which the following physical properties would be desirable: (1) high density, (2) low melting point, and (3) high thermal conductivity.

Solution

2.High Density

1. High density polythene for Toys, utensils, films, bottles, pipe and processing equipment. Wire and cable insulations.

2. High Density Concrete for Radiation Shielding

3. High Density Tungsten Alloys for aerospace and medical applications

Low melting point

1. Used in fuse wires to prevent damage to housing equipments

2. In biotechnology for analysis and recovery of RNA and DNA

3. Bismuth is used in soldering for its low Melting point

C) High Thermal Conductivity

2. Momentive high-thermal conductivity graphite and composites are used for thermal cores in PWBSs, finned heat sinks, etc

3. used in superheating steams in boiler