Assistant Mechanical Professor Interview Questions and Answers

Expansion of steam takes place by the process of adiabatic expansion.

• Steam expands in a cylinder or turbine, pushing against a piston or blades.

• During adiabatic expansion, there is no heat transfer between the steam and its surroundings.

• The expansion causes a decrease in pressure and temperature of the steam.

• The work done by the expanding steam can be harnessed to perform mechanical work.

• Examples of adiabatic expansion include steam turbines in power plants and steam engines ...read more

The basic cycle of a thermal power plant involves the conversion of heat energy into mechanical energy and then into electrical energy.

• The cycle starts with the combustion of fuel in a boiler to produce high-pressure steam.

• The high-pressure steam is then passed through a turbine, where it expands and produces mechanical energy.

• The mechanical energy is used to drive a generator, which converts it into electrical energy.

• After passing through the turbine, the low-pressure steam ...read more

Water treatment is necessary in plants to ensure the quality and safety of water used in various processes.

• Water treatment removes impurities and contaminants from water sources.

• It helps prevent equipment corrosion and scaling caused by minerals and impurities in water.

• Water treatment ensures the safety of workers and the environment by removing harmful substances.

• It improves the efficiency and performance of plant processes by providing clean water for cooling, heating, and ...read more

The function of a reheater is to reheat the steam coming out of the high-pressure turbine in a power plant.

• Reheaters are commonly used in power plants to improve the overall efficiency of the steam cycle.

• They are placed between the high-pressure and low-pressure turbines.

• The reheater receives the steam from the high-pressure turbine and reheats it before it enters the low-pressure turbine.

• Reheating the steam increases its temperature and energy content, which results in impro...read more

Dust can be controlled through various methods such as ventilation, filtration, and proper cleaning practices.

• Ventilation systems can help remove dust particles from the air by circulating fresh air and exhausting stale air.

• Filtration devices like air purifiers and dust collectors can trap and remove dust particles from the environment.

• Regular cleaning practices, including dusting surfaces and vacuuming, can help prevent the accumulation of dust.

• Using dust control measures li...read more

Superheating is necessary to increase the energy content of steam and improve the efficiency of power plants and industrial processes.

• Superheating increases the energy content of steam by raising its temperature above its saturation point.

• It improves the efficiency of power plants by allowing the steam to expand further in the turbine, extracting more work.

• Superheating also prevents condensation in steam pipes, reducing the risk of damage and improving heat transfer.

• In indust...read more