PASGT Quiz 2

How does an increase in compressor efficiency affect the shape of the PV diagram?

• The compression curve becomes steeper

• The compression curve becomes flatter

• The combustion process is affected

• The expansion process is affected

In a combined cycle power plant, how does the inclusion of a gas turbine benefit the overall efficiency?

• The gas turbine provides additional power without increasing heat rejection.

• Waste heat from the gas turbine is used to generate steam for a steam turbine, improving overall fuel utilization.

• The combined cycle allows for the use of a wider variety of fuels.

• The steam turbine can be used to start the gas turbine quickly.

Which type of turbine utilizes the energy of flowing water?

• Gas turbine

• Steam turbine

• Hydraulic turbine

• Wind turbine

Which type of gas turbine compressor is most commonly used due to its high efficiency and pressure ratios?

• Can-type combustor

• Annular combustor

• Centrifugal compressor

• Axial compressor

Which component in a gas turbine combustion chamber is responsible for monitoring the stability of the combustion process?

• Fuel injector

• Igniter

• Flame detector

• Diffuser

How does the design of an axial compressor differ from a centrifugal compressor used in gas turbines?

• Axial compressors use multiple stages of blades arranged in a circular pattern, while centrifugal compressors have a single stage.

• Centrifugal compressors utilize nozzles to direct air, while axial compressors rely on diffusers.

• Axial compressors offer higher efficiency and pressure ratios compared to centrifugal compressors.

• Centrifugal compressors are more suitable for high-pressure

How does the oil cooler contribute to the overall performance of the gas turbine?

• By preventing ice formation in the air intake

• By reducing the temperature of the lubricating oil

• By increasing the pressure of the fuel

• By controlling the turbine speed

Which component in the fuel system regulates the amount of fuel delivered to the combustion chamber?

• Fuel pump

• Fuel injectors

• Fuel filter

• Fuel control unit

How does the design of the fuel system impact the overall efficiency and emissions of a gas turbine?

• By determining the type of fuel that can be used

• By affecting the combustion process and fuel consumption

• By influencing the starting characteristics of the engine

• Both b and c

What is the primary goal of recent advancements in marine gas turbine technology?

• Increasing the size and power of gas turbines

• Reducing the environmental impact of the maritime industry

• Lowering the initial cost of gas turbine.

• Enhancing the noise levels of gas turbines