FREE AVIATION AND STUDY GAMES ABOUT FUEL

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FREE AVIATION AND STUDY GAMES ABOUT FUEL

METERING SYS EXAM QUESTIONS

Qs and Ans Expert- Explanation

This Exam contains:

-Guarantee passing score -98 Questions and Answers -format set of multiple-choice -Expert- Explanation Question 1: What corrective action should be taken when a carburetor is found to be leaking fuel from the discharge nozzle?

Answer:

Replace the needle valve and seat Question 2: In order to stabilize cams, springs, and linkages within the fuel control, manufacturers generally recommend that all final turbine engine trim adjustments be made in the

Answer:

Increase direction Question 3: The fuel level within the float chamber of a properly adjusted float-type carburetor will be

Answer:

Slightly lower than the discharge nozzle outlet

Question 4: If an aircraft engine is equipped with a carburetor that is not compensated for altitude and temperature variations, the fuel/air mixture will become

Answer:

Rich we as either the altitude or temperature increases.

Question 5: Prior to performing engine trimming, you should

Answer:

Obtain a true temperature reading comparable to that of the air that enters the engine Question 6: Select the correct statement concerning the idle system of a conventional float-type carburetor.

Answer:

The low pressure between the edges of the throttle valve and the throttle body pulls the fuel from the idle passage

Question 7: Why must a float-type carburetor supply a rich mixture during idle?

Answer:

Because at idling speeds the engine may not have enough airflow around the cylinders to provide proper cooling

Question 8: One purpose of an air bleed in a float-type carburetor is to

Answer:

Decrease fuel density and destroy surface tension.Question 9: During the operation of an aircraft engine, the pressure drop in the carburetor venturi depends primarily upon the

Answer:

Ir aids in the emulsifying/vaporization of the fuel at idle speeds Question 10: An aircraft engine continuous cylinder fuel injection system normally discharges fuel during which stroke(s)?

Answer:

All (continuously)

Question 11: When air passes through the venturi of a carburetor, what three changes occur?

Answer:

Velocity increases, temperature decreases, and pressure decreases Question 12: The fuel metering force of a conventional float-type carburetor in its normal operating range is the difference between the pressure acting on the discharge nozzle located within the venturi and the pressure

Answer:

Acting on the fuel in the float chamber Question 13: At what engine speed does the main metering jet ly function as a metering jet in a float-type carburetor?

Answer:

All RPMs above idle range Question 14: An aircraft engine equipped with a pressure-type carburetor is started with the

Answer:

Primer while the mixture control is positioned at IDLE CUTOFF Question 15: If an engine is equipped with a float-type carburetor and the engine runs excessively rich at full throttle, a possible cause of the trouble is a clogged

Answer:

Main air bleed

Question 16: The economizer system in a float-type carburetor

Answer:

Increases the fuel/air ratio at high power settingsq Question 17: During idle mixture adjustments, which of the following is normally observed to determine when the correct mixture has been achieved?

Answer:

Changes in RPM or manifold pressure

Question 18: If the main air bleed of a float-type carburetor becomes clogged, the engine will run

Answer:

Rich at power

Question 19: The desired engine idle speed and mixture setting

Answer:

Is adjusted with engine warmed up and operating Question 20: Which of the following best describes the function of an automatic mixture control

(AMC)?

Answer:

It compensates for change in the air density due to temperature and altitude Question 21: During the operation of an aircraft engine, the pressure drop in the carburetor venturi depends primarily upon the

Answer:

Air velocity Question 22: Which of the following best describes the function of an altitude mixture control?

Answer:

Regulates the richness of the fuel/air charge entering the engine

Question 23: The metered fuel pressure (chamber

• in an injection-type carburetor

Answer:

Is held constant throughout the entire engine operating range Question 24: When troubleshooting an engine that will not idle, what would be a probable cause?

Answer:

Economized valve not operating correctly