SECOND LAW THERMODYNAMICS

What is the main purpose of a boiler in a steam power plant?

• To generate electricity

• To convert water into steam

• To cool down steam

• To compress steam

Which component of the steam power plant converts steam energy into mechanical work?

• Condenser

• Pump

• Turbine

• Boiler

In a Rankine cycle, what happens in the condenser?

• Steam is superheated

• Water is converted to steam

• Steam is converted back to water

• Mechanical energy is generated

What is the Rankine cycle commonly used for?

• Cooling systems

• Jet engines

• Gas turbines

• Power generation in steam power plants

Which of the following is NOT part of the basic steam power plant?

• Nozzle

• Condenser

• Turbine

• Boiler

What does the T-s diagram represent?

• Pressure vs volume

• Temperature vs entropy

• Temperature vs speed

• Torque vs speed

Which cycle is considered more practical for steam power plants?

• Carnot cycle

• Otto cycle

• Diesel cycle

• Rankine cycle

What is thermal efficiency in a power cycle?

• Ratio of output heat to input heat

• Ratio of mechanical work to steam mass

• Ratio of useful work to heat input

• Ratio of pump work to turbine work

Specific steam consumption (SSC) is defined as...

• Steam flow rate per unit time

• Steam used per kWh of electricity

• Heat required to boil steam

• Water flow rate into the boiler

Work ratio in a steam power cycle is...

• Turbine work / Heat input

• Net work / Turbine work

• Pump work / Condenser heat

• Steam mass / Boiler pressure