Basic Gas Turbine Theory

Description

Basic Gas Turbine Theory
Andrew Lee
Quiz by Andrew Lee, updated more than 1 year ago
Andrew Lee
Created by Andrew Lee over 8 years ago
146
2

Resource summary

Question 1

Question
What are the basic sections of a turbine engine?
Answer
  • The basic sections of a turbine engine are the intake, the compressor, the combustion chamber, the turbine and the exhaust section.
  • The basic sections of a turbine engine are the intake, the compressor, the combustion chamber, the exhaust and the exhaust section.
  • The basic sections of a turbine engine are the intake, the compressor, the combustion chamber, the turbo and the exhaust section.
  • The basic sections of a turbine engine are the intake, the compressor, the combustion chamber, the fan blades and the exhaust section.

Question 2

Question
What is the basic description of the functioning of a turbine engine?
Answer
  • Air is drawn (or rammed), via the intake, into a multi-stage compressor, fuel is added and ignited in the combustor, and the air is expanded through the turbine stages before being expelled out the back of the engine
  • Air is drawn (or rammed), via the intake, into a multi-stage compressor, fuel is added and ignited in the combustor, and the air is compressed through the turbine stages before being expelled out the back of the engine
  • Air is drawn (or rammed), via the intake, into a one-stage compressor, fuel is added and ignited in the combustor, and the air is compressed through the turbine stages before being expelled out the back of the engine
  • Air is drawn (or rammed), via the intake, into a one-stage compressor, fuel is added and ignited in the combustor, and the air is expanded through the turbine stages before being expelled out the back of the engine

Question 3

Question
How is Newtons second law mathematically expressed?
Answer
  • F = Ma
  • E = Mc2
  • M = F/a
  • A = F/m

Question 4

Question
What is newtons third law?
Answer
  • For every action there is an equal and opposite reaction
  • Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.
  • The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector.

Question 5

Question
What is Charles' law?
Answer
  • Charles law states that at a constant pressure, the volume of a given mass of gas is directly proportional to its absolute temperature
  • Charles law states that at a constant density, the volume of a given mass of gas is directly proportional to its absolute temperature
  • Charles law states that at a constant pressure, the volume of a given mass of gas is directly proportional to its absolute pressure
  • Charles law states that at a constant pressure, the volume of a given mass of gas is directly proportional to its absolute density

Question 6

Question
What is Boyles law?
Answer
  • Boyles law states that at a constant temperature, the pressure and the volume of a gas are inversely proportional.
  • Boyles law states that at a constant temperature, the pressure and the volume of a gas are directly proportional.
  • Boyles law states that at a constant temperature, the pressure and the volume of a liquid are directly proportional.
  • Boyles law states that at a constant temperature, the pressure and the volume of a liquid are inversely proportional.

Question 7

Question
How does the temperature, density, pressure and velocity of a gas flow vary through a convergent duct at subsonic speed?
Answer
  • Temperature, density and pressure reduce and velocity increases.
  • Temperature, density and pressure increase and velocity reduces.
  • Temperature, density and pressure reduce and velocity stays the same.
  • Temperature, density and pressure reduce and velocity reduces.

Question 8

Question
How does the temperature, density, pressure and velocity of a gas flow vary through a divergent duct at subsonic speed?
Answer
  • Temperature, density and pressure increase and velocity reduces
  • Temperature, density and pressure reduce and velocity reduces
  • Temperature, density and pressure increase and velocity increase
  • Temperature, density and pressure reduce and velocity increases

Question 9

Question
How does the temperature, density, pressure and velocity of a gas flow vary through a convergent duct at super sonic speed?
Answer
  • Temperature, density and pressure increase and velocity reduces
  • Temperature, density and pressure increase and velocity increases
  • Temperature, density and pressure reduce and velocity reduces
  • Temperature, density and pressure reduce and velocity increases

Question 10

Question
How does the temperature, density, pressure and velocity of a gas flow vary through a divergent duct at super sonic speed?
Answer
  • Temperature, density and pressure reduce and velocity increases
  • Temperature, density and pressure reduce and velocity reduces
  • Temperature, density and pressure increases and velocity increases
  • Temperature, density and pressure increases and velocity reduces

Question 11

Question
Where does the subsonic flow decrease in velocity and increase in pressure
Answer
  • Through a divergent duct
  • Through a convergent duct

Question 12

Question
Where does subsonic flow increase in velocity and decrease in pressure?
Answer
  • Through a convergent duct
  • Through a divergent duct

Question 13

Question
Where does super sonic flow increase in velocity and decrease in pressure?
Answer
  • Through a convergent duct
  • Through a divergent duct

Question 14

Question
Where does super sonic flow decrease in velocity and increase in pressure?
Answer
  • Convergent duct
  • Divergent duct

Question 15

Question
What property is exhibited by accelerating gas flow?
Answer
  • That the total energy is constant.
  • That the total energy is increases.
  • That the total energy is decreases.

Question 16

Question
Where is a turbofan is the pressure the highest?
Answer
  • In the diffuser.
  • Exiting the exhaust
  • In the compression chamber
  • In the combustion chamber

Question 17

Question
Where in a turbofan engine is the gas velocity highest?
Answer
  • In the intake
  • Exiting the exhaust nozzle
  • In the combustion chamber
  • In the compression axials

Question 18

Question
Where in a turbine engine is the gas temperature the highest?
Answer
  • At the exhaust nozzle
  • Just before the exhaust nozzle
  • At the flame in the combustion chamber
  • Just after the air reaches it highest pressure

Question 19

Question
How does gas pressure vary as it passes through the combustion chamber?
Answer
  • It remains nearly constant, reducing very slightly due to construction ineffecies
  • It increases
  • It decreases
  • It increases then decreases as it passes through the combustion chamber

Question 20

Question
How does gas temperature and velocity vary as it passes through the combustion chamber?
Answer
  • Temperature and velocity both increase.
  • Temperature and velocity both decrease.
  • Temperature increases and velocity decreases.
  • Temperature decreases and velocity increases

Question 21

Question
How does gas pressure, temperature and velocity vary as it passes through the turbine section?
Answer
  • Pressure and temperature progressively reduce, and velocity increases through the nozzle guide vanes and stators and reduces through the turbine blades.
  • Pressure and temperature progressively increase, and velocity increases through the nozzle guide vanes and stators and reduces through the turbine blades.
  • Pressure and temperature progressively reduce, and velocity decreases through the nozzle guide vanes and stators and reduces through the turbine blades.
  • Pressure and temperature progressively increase, and velocity decreases through the nozzle guide vanes and stators and reduces through the turbine blades.

Question 22

Question
Why is the Brayton Cycle in a turbine engine referred to as an open or continuous cycle?
Answer
  • Because intake, compression combustion and exhaust are all occurring at the same time
  • Because the engine is continuously running itself
  • Because intake, compression combustion and exhaust are all occurring openly
  • Because fuel is being continuously burnt
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