Power Plant Systems
Review questions on the topic Steam Power station/Plant
Questions and Answers
- 1.
In steam power generation,what is IGCC means.
- A.
Integrated Geothermal Complete Cycle
- B.
Integrated Gas Combined Cycle
- C.
Integrated Gasification Combined Cycle
- D.
International Gasification Combined unit Cycle
Correct Answer
C. Integrated Gasification Combined CycleExplanation
IGCC stands for Integrated Gasification Combined Cycle. This is a technology used in steam power generation where coal or other carbon-based fuels are converted into a gas through a process called gasification. The gas is then used to generate electricity in a combined cycle power plant, which involves both gas and steam turbines. This process is known for its high efficiency and lower emissions compared to traditional coal-fired power plants.Rate this question:
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- 2.
An engine or turbine that moves the generator.
- A.
Propeller
- B.
Prime mover
- C.
Condenser
- D.
Shafting
Correct Answer
B. Prime moverExplanation
A prime mover refers to an engine or turbine that is responsible for providing the initial mechanical energy required to move the generator. It is the component that converts a form of fuel or energy into mechanical energy, which is then used to drive the generator and produce electricity. In this context, the prime mover acts as the primary source of power for the generator, enabling it to function and generate electricity.Rate this question:
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- 3.
This is the reduction gear between the prime mover and generator.
- A.
Load gear
- B.
Reduction gear
- C.
Bevel gear
- D.
Clutch
Correct Answer
A. Load gearExplanation
The given correct answer is "Load gear". This suggests that the gear mentioned in the question is responsible for carrying the load between the prime mover and the generator. It implies that the load gear is designed to reduce the speed and increase the torque of the system, allowing for efficient power transmission. The load gear is an essential component in the overall gear system, ensuring smooth and effective operation between the prime mover and the generator.Rate this question:
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- 4.
A steam turbine that exhausts directly into a condenser at below atmospheric pressure.
- A.
Back pressure turbine
- B.
Condensing turbine
- C.
Extraction turbine
- D.
High pressure turbine
Correct Answer
B. Condensing turbineExplanation
A condensing turbine is the correct answer because it exhausts directly into a condenser at below atmospheric pressure. This type of turbine is designed to maximize the efficiency of the power generation process by extracting as much energy as possible from the steam. The low pressure in the condenser allows for the steam to be condensed back into water, which can then be recycled and used again in the steam cycle. This design is commonly used in power plants to generate electricity.Rate this question:
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- 5.
In a steam turbine generator, it is also known as bleed.
- A.
Extraction
- B.
Exhausts
- C.
Excess
- D.
Extrusion
Correct Answer
A. ExtractionExplanation
In a steam turbine generator, extraction refers to the process of removing a portion of the steam from the turbine at intermediate stages. This extracted steam can then be used for other purposes such as heating or industrial processes. It helps to optimize the efficiency of the overall system by utilizing the excess steam that would otherwise be wasted.Rate this question:
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- 6.
NCG which is always present in geothermal steam, causes power plant inefficiencies that result in increased steam consumption and higher plant costs. What NCG does mean?
- A.
Nitrogen Condenser gas
- B.
Non-Condensable gas
- C.
No Condensate gas
- D.
New Condensed gas
Correct Answer
B. Non-Condensable gasExplanation
NCG stands for Non-Condensable gas. In geothermal steam, NCG refers to gases that cannot be condensed into a liquid state. These gases are always present in the steam and can cause inefficiencies in power plants. They lead to increased steam consumption and higher costs for the plant.Rate this question:
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- 7.
For a boiler plate, what would be the minimum plate thickness considering a 1/16" corrosion allowance.
- A.
1/4"
- B.
3/4"
- C.
5/16"
- D.
3/16"
Correct Answer
C. 5/16"Explanation
The minimum plate thickness for a boiler plate should consider a corrosion allowance of 1/16". This means that the actual thickness of the plate should be 1/16" more than the required minimum thickness. Among the given options, the closest thickness to the required minimum thickness with the corrosion allowance is 5/16". Therefore, 5/16" would be the correct answer.Rate this question:
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- 8.
In Superheater operation the steam piping is directed through the flue gas path in the boiler furnace. The temperature in this area is typically ranging from.
- A.
1300-1600 C
- B.
1350-1700 C
- C.
1100-1200 C
- D.
900-1000 C
Correct Answer
A. 1300-1600 CExplanation
In Superheater operation, the steam piping is directed through the flue gas path in the boiler furnace. The temperature in this area is typically ranging from 1300-1600°C.Rate this question:
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- 9.
It is used to relieve pressure and prevent possible explosion of the boiler.
- A.
Shut off valve
- B.
Safety valve
- C.
Bull valve
- D.
Fuel valve
Correct Answer
B. Safety valveExplanation
The safety valve is used to relieve pressure and prevent possible explosion of the boiler. When the pressure inside the boiler exceeds a certain limit, the safety valve automatically opens, allowing excess steam to escape and reducing the pressure. This helps to protect the boiler from damage and ensures the safety of the surrounding environment and personnel.Rate this question:
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- 10.
It is a mechanical means that is used to turn off the burner or shut off fuel to the boiler to prevent it from running, once the water goes below a certain point.
- A.
Shut off valve
- B.
Low-water cut-off valve
- C.
Water level indicators
- D.
Automatic blowdown
Correct Answer
B. Low-water cut-off valveExplanation
A low-water cut-off valve is a mechanical device that is installed in a boiler system to automatically shut off the burner or fuel supply when the water level in the boiler drops below a certain point. This is important because if the water level gets too low, it can cause damage to the boiler and potentially lead to a dangerous situation. The low-water cut-off valve helps to prevent this by ensuring that the boiler is not able to operate when the water level is too low.Rate this question:
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Current Version
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Mar 20, 2023Quiz Edited by
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Apr 10, 2012Quiz Created by
Enriv
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