Gas Turbine Engine Quiz 2

What is the name of the thermodynamic cycle used by a gas turbine engine?

• Otto cycle

• Rankine cycle

• Diesel cycle

• Brayton cycle

What is the basic difference between the Otto cycle and the Brayton cycle?

• The Brayton cycle uses a constant-pressure thermodynamic cycle, while the Otto cycle uses a constant-volume thermodynamic cycle

• The events occur at different times in the Otto cycle, but at the same time in the Brayton cycle

• The events occur at the same location in the Otto cycle, but at different locations in the Brayton cycle

• The Otto cycle uses a constant-pressure thermodynamic cycle, while the Brayton cycle uses a constant-volume thermodynamic cycle

What is the primary measure of the propulsive force developed by a turbojet or turbofan engine?

• Thrust

• Horsepower

• RPM

• Torque

What is the formula for calculating the momentum of air and fuel leaving the engine?

• WaW₁/g

• Fn = Wa (V₂ - V₁) + Wf (V₂) + Aj (P2 - Pam)/g

• (Wa+Wf)/g

• V₁ +0

What is the effect of airspeed on the net thrust produced by a turbojet or turbofan engine?

• Net thrust remains constant regardless of airspeed

• Net thrust decreases with an increase in airspeed

• Net thrust is not affected by airspeed

• Net thrust increases with an increase in airspeed

What is the effect of air temperature on the thrust produced by a gas turbine engine?

• Thrust increases linearly with air temperature

• As air temperature increases, thrust increases

• As air temperature increases, thrust decreases

• Air temperature has no effect on thrust

What is the effect of air pressure on the thrust produced by a gas turbine engine?

• As air pressure increases, thrust increases

• As air pressure increases, thrust decreases

• Thrust increases linearly with air pressure

• Air pressure has no effect on thrust

At what altitude does the temperature of the air stabilize, causing the thrust produced by a jet engine to decrease at a faster rate?

• 40,000 feet

• 36,000 feet

• 30,000 feet

• 20,000 feet

What is the resultant effect of ram and airspeed on the net thrust produced by a gas turbine engine?

• Ram effect increases thrust, while airspeed effect decreases thrust

• Airspeed effect increases thrust, while ram effect decreases thrust

• Both ram effect and airspeed effect increase thrust

• Both ram effect and airspeed effect decrease thrust

How can the amount of thrust produced by a jet engine be increased?

• By increasing the air temperature

• By decreasing the air pressure

• By using water injection

• By reducing the airspeed