Basic Turbine Engine Theory and Turbine Engine Types

What is Newtons third law?

• For every action there is an equal and opposite reaction

• Every object continues in its state of motion or uniform motion in a straight line unless acted upon by an external force

• The external forces acting on an object are proportional to the product of its mass and the acceleration produced by the force

• Every point mass attracts every other point mass by a force acting along the line intersecting both points

What is the practical application of newtons third law?

• Jet thrust

• Electric current flow

• Chemical reaction rates

• Magnetic field generation

The Gas Turbine Engine uses the principle of:

• Newton’s Third Law of motion

• Creating thrust equal to the weight of the aircraft

• Expelling air at the same speed as that of the aircraft

• The fluid flywheel

What is Charles law?

• At constant pressure, the volume of a given mass of gas is directly proportional to its absolute temperature.

• At constant pressure, the volume of a given mass of gas is inversely proportional to its absolute temperature.

• At constant volume, the pressure of a given mass of gas is directly proportional to its absolute temperature.

• At constant temperature, the volume of a given mass of gas is inversely proportional to its pressure.

What is Boyles law?

• At constant temperature, the pressure and the volume of a gas are inversely proportional.

• At constant temperature, the pressure and the volume of a gas are directly proportional according to Boyle's law.

• Boyle's law states that the volume of a gas decreases as its pressure decreases, regardless of temperature.

• Boyle's law only applies to gases that are at very low temperatures.

Which of the following is an example of Potential Energy?

• Temperature

• Volume

• Pressure

• Velocity

What property is exhibited by accelerating gas flow?

• That the total energy is constant

• The gas particles will move at a slower speed than before.

• The volume of the gas will decrease.

• The gas flow will become more chaotic and disorganized.

Why is the Brayton Cycle in a turbine engine referred to as an open or continuous cycle?

• Because intake, compression combustion and exhaust are all occurring at the same time.

• Because it doesn't have a fixed amount of working fluid, unlike a closed cycle. In an open cycle, the working fluid is constantly flowing into and out of the system.

• Because it takes in air from the atmosphere, uses it to generate power, and then exhausts it back into the atmosphere. This process is continuous and open to the surrounding environment.

• Because it doesn't require any external cooling or heat rejection, unlike a closed cycle. Instead, the exhaust gases are expelled directly into the atmosphere, making it a continuous process.

During the Brayton cycle, combustion takes place:

• Continuously

• Once every revolution

• Once every other revolution

• Only during the start cycle

Where in a turbofan engine is the pressure highest?

• In the diffuser

• In the combustion chamber

• In the compressor

• In the turbine exhaust nozzle