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FREE AVIATION AND STUDY GAMES ABOUT AMT1220
EXAM QUESTIONS
Actual Qs and Ans Expert-Verified Explanation
This Exam contains:
-Guarantee passing score -49 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: On an engine equipped with a pressure-type carburetor, how is fuel supply in the idling range insured?
Answer:
by the inclusion in the carburetor of a spring in the unmetered fuel chamber
Question 2: What are benefits of using water injection?
Answer:
Increase engine power and control detonation and preignition Question 3: If the bellows of the automatic mixture control (AMC) in a pressure carburetor ruptures while the engine is operating at altitude, how will the mixture be affected?
Answer:
It will become richer Question 4: What is the fuel metering force of a conventional float-type carburetor in its normal operating range?
Answer:
the pressure acting on the fuel in the float chamber and the discharge nozzle
Question 5: When operating a gas turbine engine fuel control unit, what factor is NOT used?
Answer:
Mixture control position Question 6: How would the engine run if the main air bleed of a float-type carburetor becomes clogged?
Answer:
Rich at rated power
Question 7: What occurs when the air/fuel mixture burns too fast?
Answer:
Detonation Question 8: What system in a float-type carburetor increases the fuel/air ratio at high power settings?
Answer:
The economizer system
Question 9: What component measures the amount of air delivered to the engine?
Answer:
Venturi Question 10: What device controls the volume of fuel/air mixture to the cylinders?
Answer:
throttle valve
Question 11: The carburetor venturi does not do what?
Answer:
regulate the idle system Question 12: What occurs when a back-suction type mixture control is placed in IDLE CUTOFF?
Answer:
The float chamber will be vented to a negative pressure area
Question 13: What position will the pressurization and dump valves be in when the engine is shut down?
Answer:
Pressurization valve closed, dump valve open Question 14: Where is the measurement usually made to determine the float level in a float-type carburetor?
Answer:
From the top of the fuel in the float chamber to the parting surface of the carburetor Question 15: When air passes through the venturi of a carburetor, what three changes occur?
Answer:
Velocity increases, temperature decreases, and pressure decreases Question 16: How would you adjust the level of the float in a float-type carburetor?
Answer:
Add or remove shims under the needle-valve seat
Question 17: What causes the pressure drop in the carburetor venturi?
Answer:
air velocity Question 18: What component in a float-type carburetor aids in emulsifying the fuel at idle speeds?
Answer:
The idling air bleed Question 19: In air-cooled reciprocating engines, when will the mixture be richer?
Answer:
At rated power and at idle
Question 20: When should the needle valve and seat be replaced?
Answer:
When the carburetor is found to be leaking fuel from the discharge nozzle
Question 21: What is the purpose of the carburetor accelerating system?
Answer:
Temporarily enrich the mixture when the throttle is suddenly opened
Question 22: How is the desire idle speed and mixture setting adjusted?
Answer:
With the engine warmed up and operating
Question 23: How is the fuel control adjusted when trimming a turbine engine?
Answer:
Set to idle RPM and maximum speed
Question 24: What is generally turned off when trimming an engine>
Answer:
All accessory bleed air Question 25: How much air to fuel is a mixture of 11:1?
Answer:
- part fuel to 11 parts air
Question 26: What would a ruptured balance diaphragm cause?
Answer:
A lean mixture and high cylinder temperature Question 27: How is idle cutoff accomplished on a carburetor equipped with a back-suction mixture control?
Answer:
By introducing low pressure (intake manifold) air into the float chamber
Question 28: What has little to no effect on the operation of a jet engine?
Answer:
humidity
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