IGT PO1.1 GAS TURBINE CYCLES AND COMPONENTS

Which of the following best describes a rotodynamic machine?

• A device that converts electrical energy into mechanical energy.

• A mechanism that converts the energy of a moving fluid into the energy of a rotating shaft.

• An apparatus that stores kinetic energy in a rotating drum.

• A system that converts solar energy into electrical power.

What is the primary mechanism by which a rotodynamic machine operates?

• Conversion of potential energy to kinetic energy.

• Transfer of heat energy to mechanical energy.

• Transfer of energy between a moving fluid and a rotating shaft.

• Conversion of mechanical energy to electrical energy.

In a turbine, how is energy transferred from the fluid to the rotor?

• The fluid increases its velocity as it passes through the rotor, gaining energy.

• The rotor's speed decreases due to the fluid's tangential force, causing energy loss.

• The fluid's tangential momentum decreases as it imparts a tangential force on the rotor, transferring energy to the rotor.

• The fluid's energy is entirely converted into heat as it exits the rotor.

In a fan, pump, or compressor, what role does the impeller play?

• It reduces the tangential momentum of the fluid, transferring energy from the fluid to the rotor.

• It increases the tangential momentum of the fluid, transferring energy from the rotor to the fluid.

• It stores mechanical energy to be later used for fluid movement.

• It converts electrical energy directly into fluid motion.

Which of the following statements is TRUE about aero derivative gas turbines?

• They are specifically designed for base load operation.

• They can produce full power within three minutes after start up.

• They have a lower capital cost per kilowatt installed compared to industrial gas turbines.

• They can produce a maximum output of more than 260 MW.

What is a key difference between aero derivative and industrial gas turbines?

• Aero derivative turbines are more suitable for base load operation than industrial turbines.

• Industrial turbines have a higher capital cost per kilowatt installed than aero derivative turbines.

• Aero derivative turbines are modified aircraft jet engines, while industrial turbines are designed specifically for stationary power generation.

• Industrial turbines can produce full power within three minutes, while aero derivative turbines take longer.

Why are industrial gas turbines considered suitable for base load operation?

• They can produce full power very quickly after startup.

• They have a lower maximum output compared to aero derivative turbines.

• They have a lower capital cost per kilowatt installed and more robust construction.

• They are derived from aircraft jet engines and can reach full power in less than 10 minutes.

What is the typical maximum output of an aero derivative gas turbine?

• Up to 40 MW

• Up to 100 MW

• Up to 260 MW

• More than 300 MW

The picture shows the fluid flow orientation in an air compressor of a gas turbine. What is the type of fluid flow orientation shown?

• Axial type

• Mixed type

• Radial type

What is the correct sequence of the main components in a gas turbine system?

• Compressor → Combustion Chamber → Gas Turbine

• Combustion Chamber → Compressor → Gas Turbine

• Gas Turbine → Compressor → Combustion Chamber

• Compressor → Gas Turbine → Combustion Chamber