PPS semi Q3

What is the primary function of a steam turbine in power generation?

• To increase steam pressure

• To convert thermal energy into mechanical work

• To convert mechanical energy into thermal energy

• To store electrical energy

What does thermal efficiency in a steam turbine system indicate?

• The speed of the turbine

• The total energy lost in the system

• The ratio of work output to heat energy supplied

• The amount of steam produced

Which method is used to calculate thermal efficiency?

• Heat balance method

• Mechanical efficiency method

• Isentropic efficiency method

• Overall efficiency method

What is isentropic efficiency used for?

• To measure the ideal performance of a turbine

• To assess mechanical losses

• To calculate the total energy output

• To determine the steam quality

Which factor does NOT affect steam turbine efficiency?

• Steam conditions

• Load variations

• Ambient temperature

• Turbine design

What happens to turbine efficiency when steam quality is low?

• It doubles

• It decreases

• It remains unchanged

• It increases significantly

What is the overall plant efficiency a combination of?

• Only the boiler efficiency

• Only the turbine efficiency

• The efficiencies of all major components

• The generator efficiency alone

What is one of the main mechanical losses in a steam turbine?

• Chemical losses

• Radiation losses

• Heat losses

• Electrical losses

How can heat losses in a turbine be minimized?

• By using better insulation

• By increasing steam pressure

• By increasing the turbine size

• By reducing the load

What is the role of turbine blade design in efficiency?

• It has no impact on efficiency

• It can reduce drag and improve energy conversion

• It only affects the aesthetic of the turbine

• It increases the weight of the turbine