Volume 2 - 2014 2A651 CDC
- 1.(201) An aircraft taxiing at a steady speed can be used to demonstrate
- A.
Bernoulli’s principle.
- B.
Newton’s first law of motion.
- C.
Newton’s second law of motion.
- D.
Newton’s third law of motion.
- 2.(201) Newton’s third law of motion explains why an operating jet engine produces
- A.
Forward thrust.
- B.
Forward acceleration.
- C.
Increased acceleration.
- D.
Decreased acceleration.
- 3.(201) Which type of duct would decrease the velocity and increase the pressure of a gas as it passes through?
- A.
Elbow.
- B.
Straight.
- C.
Divergent.
- D.
Convergent.
- 4.(201) "The combination of decreased pressure above an airfoil, and the increased pressure below the airfoil produces lift" is best described by
- A.
Bernoulli’s principle.
- B.
Newton’s first law of motion.
- C.
Newton’s second law of motion.
- D.
Newton’s third law of motion.
- 5.(202) Foot-pounds and inch-pounds are units of measure for
- A.
Work.
- B.
Power.
- C.
Inertia.
- D.
Friction.
- 6.(202) What does fuel for an engine represent?
- A.
Available horsepower.
- B.
Thrust produced.
- C.
Potential energy.
- D.
Efficiency ratio.
- 7.(203) Which section of a jet engine continually supplies air and maintains pressure?
- A.
Turbine.
- B.
Diffuser.
- C.
Compressor.
- D.
Combustion.
- 8.(203) The temperature of compressed air in a jet engine must be raised to
- A.
Increase energy.
- B.
Decrease energy.
- C.
Increase volume.
- D.
Decrease volume.
- 9.(203) Which section of a jet engine introduces and burns fuel?
- A.
Turbine.
- B.
Diffuser.
- C.
Compressor.
- D.
Combustion.
- 10.(204) How many British thermal units (Btu) does the heat content per pound of kerosene produce?
- A.
10,500.
- B.
15,000.
- C.
18,500.
- D.
40,000.
- 11.(204) The efficiency of a jet engine is often referred to as
- A.
Energy.
- B.
Momentum.
- C.
Thermal efficiency.
- D.
Propulsive efficiency.
- 12.(204) The product of thermal efficiency and propulsive efficiency is
- A.
Mechanical efficiency
- B.
Overall efficiency
- C.
Power efficiency
- D.
Thrust efficiency
- 13.(205) To measure barometric pressure, you would use a
- A.
Potentiometer.
- B.
Potentiometer.
- C.
Pyrometer.
- D.
Barometer
- 14.(205) What effect does moisture content or humidity have on density of air?
- A.
More moisture, more dense
- B.
More moisture, less dense
- C.
Less moisture, less dense
- D.
None.
- 15.(205) Due to the divergent design of a diffuser, air pressure
- A.
Remains the same
- B.
Fluctuates.
- C.
Decreases.
- D.
Increases.
- 16.(205) The air temperature of a jet engine gradually rises across the compressor to the diffuser outlet as a result of
- A.
Compression.
- B.
Fuel expansion.
- C.
Turbine discharge.
- D.
Ambient temperature increase.
- 17.(205) Where is the highest point of temperature reached in an engine?
- A.
Tailpipe.
- B.
Exhaust cone.
- C.
Turbine section.
- D.
Combustion section.
- 18.(206) Which engine component meters fuel for combustion?
- A.
Pressure and drain (P&D) valve.
- B.
Fuel control.
- C.
Fuel nozzle.
- D.
Fuel pump.
- 19.(206) What happens to the energy that is absorbed by the turbine wheel?
- A.
50 percent is used for accessories.
- B.
60 percent is used for accessories.
- C.
It is returned to the compressor.
- D.
It operates the anti-ice system.
- 20.(207) What is the required velocity for air and gases flowing through a jet engine?
- A.
Low velocity at all times.
- B.
Less velocity exiting than entering.
- C.
Equal velocity entering and exiting.
- D.
Greater velocity exiting than entering.
- 21.(207) The velocity of the stream of air that flows through a jet engine reaches its highest point at the
- A.
Ejector nozzle.
- B.
Combustion section.
- C.
Turbine exhaust cone.
- D.
Turbine stator (nozzle diaphragm).
- 22.(207) What is the general flow of gases from the combustion chamber?
- A.
At right angles to the rotor shaft.
- B.
Parallel to the axis of the rotor shaft.
- C.
At the same velocity as the rotor shaft.
- D.
In a reverse direction from the rotor shaft.
- 23.(207) Gases enter the jet-engine’s first-stage turbine wheel blades from the
- A.
Turbine wheel blades.
- B.
Combustion chamber.
- C.
Turbine stator.
- D.
Flameholder.
- 24.(207) When two or more turbine wheels are used in a jet engine, which component is placed directly in front of each turbine wheel?
- A.
Diffuser.
- B.
Jet nozzle.
- C.
Combustion chamber.
- D.
Turbine stator (nozzle diaphragm).
- 25.(208) A jet engine derives its name from its design in that it uses
- A.
An exhaust-gas-driven turbine wheel to drive its compressor.
- B.
Nozzles which are called jet within the engine.
- C.
A turbine-type compressor to maintain power.
- D.
Turbo-superchargers within the engine.
Questions: 124 | Attempts: 8160 | Last updated: Jan 14, 2021
-
Sample QuestionHow is doctrine applied?
Questions: 266 | Attempts: 8139 | Last updated: Oct 13, 2020
-
Sample QuestionWhen turning a patient, what is the MOST IMPORTANT precaution to take whether you are pushing or pulling the patient?
Questions: 176 | Attempts: 7321 | Last updated: May 31, 2019
-
Sample Question(001) Which squadrons form a maintenance group?
Back to top