Kirloskar Oil Engines Interview Questions and Answers for Freshers

Entropy is a measure of disorder or randomness in a system.

• Entropy increases with time in a closed system

• A messy room has higher entropy than a clean room

• Melting of ice is an example of increase in entropy

• Burning of wood is another example of increase in entropy

Thermodynamic processes are various ways in which energy can be transferred to or from a system.

• Isothermal process: constant temperature

• Adiabatic process: no heat transfer

• Isobaric process: constant pressure

• Isochoric process: constant volume

• Examples: carnot cycle, rankine cycle, stirling cycle

Otto cycle is a four-stroke combustion cycle used in spark-ignition engines.

• It consists of four processes: intake, compression, power, and exhaust.

• During the intake stroke, the fuel-air mixture is drawn into the cylinder.

• In the compression stroke, the mixture is compressed to a high pressure and temperature.

• The power stroke is where the spark plug ignites the mixture, causing it to expand and push the piston down.

• Finally, in the exhaust stroke, the spent gases are expelled fr...read more

Factor of safety is the ratio of the maximum stress a material can withstand to the actual stress it is subjected to.

• It is used to ensure the safety and reliability of a design.

• It is calculated by dividing the ultimate strength of a material by the maximum stress it is expected to experience.

• A higher factor of safety indicates a more reliable design.

• Factors of safety vary depending on the application and industry.

• For example, a factor of safety of 2 is common in civil enginee...read more

Electrical machines are devices that convert electrical energy into mechanical energy or vice versa.

• Types include electric motors, generators, transformers, and alternators

• Electric motors convert electrical energy into mechanical energy to perform work

• Generators convert mechanical energy into electrical energy

• Transformers transfer electrical energy between circuits

• Alternators convert mechanical energy into alternating current electrical energy

Power system working involves generation, transmission, distribution, and utilization of electrical energy.

• Power generation from sources like coal, hydro, nuclear, solar, wind, etc.

• Transmission of power through high voltage lines to substations.

• Distribution of power to homes and businesses through transformers and distribution lines.

• Utilization of power by various electrical devices and appliances.

• Monitoring and control of the power system to ensure reliability and efficiency...read more