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Embry-Riddle Aeronautical University *

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121

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Mechanical Engineering

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Apr 3, 2024

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3/31/24, 2:59 PM 2.1 Laboratory Quiz: Aircraft Systems: ASCI 121L Airmen Knowledge Test Prep - Mar 2024 - Online https://erau.instructure.com/courses/170678/quizzes/599657 1/8 Due Mar 31 at 11:59pm Points 100 Questions 25 Time Limit None Allowed Attempts Unlimited Instructions Attempt History Attempt Time Score LATEST Attempt 1 6 minutes 96 out of 100 Score for this attempt: 96 out of 100 Submitted Mar 31 at 5:58pm This attempt took 6 minutes.  Question 1 4 / 4 pts the spark plugs are fouled or shorted out or the wiring is defective. hot spots in the combustion chamber ignite the fuel/air mixture in advance of normal ignition. Correct! the unburned charge in the cylinders explodes instead of burning normally. Detonation is a sudden explosion, or instantaneous combustion, of the fuel/air mixture in the cylinders, producing extreme heat and severe structural stresses on the engine.  This quiz can be taken as many times as desired . Answer the 25 multiple choice questions. Before you begin, make sure you have downloaded the FAA Airman Knowledge Testing Supplement Document (PDF) (https://www.faa.gov/training_testing/testing/supplements/media/sport_rec_private_akts.pdf) and are familiar with navigating its contents, as some of the Lab questions will reference its figures. Any reference to a figure in the quiz can be found in the Supplement Document. Time limit: There is no time limit for this lab. It is recommended that you use a 50-minute limit and at the end of 50 minutes, assess your status. You actual quiz in ASCI 121 will have a 50-minute limit and give a notification pop-up approximately 10 seconds before the time expires. If you encounter technical difficulties, please contact your instructor. Grading: You will see scores for multiple-choice questions right away. Please contact your instructor if you have any questions. Your score will be reflected by the highest score you attain . 2.1 Aircraft Systems Laboratory Quiz Take the Quiz Again Detonation occurs in a reciprocating aircraft engine when

3/31/24, 2:59 PM 2.1 Laboratory Quiz: Aircraft Systems: ASCI 121L Airmen Knowledge Test Prep - Mar 2024 - Online https://erau.instructure.com/courses/170678/quizzes/599657 2/8 Question 2 4 / 4 pts Correct! Owner or operator. Pilot-in-command. Mechanic. 14 CFR Part 91 places primary responsibility on the owner or operator for maintaining an aircraft in an airworthy condition.  Question 3 4 / 4 pts will run very rough. Correct! cannot be shut down by turning the switch to the OFF position. cannot be started with the switch in the ON position. If the ground wire between a magneto and the ignition switch becomes disconnected, the primary current cannot be directed to ground, and the engine cannot be shut down by turning the switch to the OFF position.  Question 4 4 / 4 pts Correct! The throttle controls power output as registered on the manifold pressure gauge and the propeller control regulates engine RPM. The throttle controls engine RPM as registered on the tachometer and the mixture control regulates the power output. The throttle controls power output as registered on the manifold pressure gauge and the propeller control regulates a constant blade angle. On aircraft equipped with a constant-speed propeller, the throttle controls the engine power output which is registered on the manifold pressure gauge. The propeller control changes the pitch angle of the propeller and governs the RPM which is indicated on the tachometer.  Question 5 4 / 4 pts cause damage to heat-conducting hoses and warping of the cylinder cooling fins. not appreciably affect an aircraft engine. Correct! cause loss of power, excessive oil consumption, and possible permanent internal engine damage. Operating an engine at a higher temperature than it was designed for will cause loss of power, excessive oil consumption, and detonation. It will also lead to serious permanent injury to the engine including scoring of cylinder walls, damage to pistons and rings, and burning and warping of valves.  Who is primarily responsible for maintaining an aircraft in airworthy condition? If the ground wire between the magneto and the ignition switch becomes disconnected, the most noticeable result will be that the engine How is engine operation controlled on an engine equipped with a constant-speed propeller? Excessively high engine temperatures will

3/31/24, 2:59 PM 2.1 Laboratory Quiz: Aircraft Systems: ASCI 121L Airmen Knowledge Test Prep - Mar 2024 - Online https://erau.instructure.com/courses/170678/quizzes/599657 3/8 Question 6 4 / 4 pts Correct! pre-ignition. combustion. detonation. Preignition is defined as ignition of the fuel prior to normal ignition.  Question 7 4 / 4 pts Quick walk around with a check of gas and oil. Any sequence as determined by the pilot-in-command. Correct! Thorough and systematic means recommended by the manufacturer. The preflight inspection should be a thorough and systematic means by which the pilot determines that the airplane is ready for safe flight. Most Aircraft Flight Manuals or Pilot's Operating Handbooks contain a section devoted to a systematic method of performing a preflight inspection that should be used by the pilot for guidance.  Question 8 4 / 4 pts Operating with higher-than-normal oil pressure. Correct! Using fuel that has a lower-than-specified fuel rating. Using fuel that has a higher-than-specified fuel rating. Excessively high engine temperatures result from insufficient cooling caused by too lean a mixture, too low a grade of fuel, low oil, or insufficient airflow over the engine.  Question 9 0 / 4 pts engine roughness. Correct Answer loss of RPM. You Answered increase of RPM. For airplanes with a fixed-pitch propeller, the first indication of carburetor ice is loss of RPM.  Question 10 4 / 4 pts The uncontrolled firing of the fuel/air charge in advance of normal spark ignition is known as How should an aircraft preflight inspection be accomplished for the first flight of the day? Which would most likely cause the cylinder head temperature and engine oil temperature gauges to exceed their normal operating ranges? If an aircraft is equipped with a fixed-pitch propeller and a float-type carburetor, the first indication of carburetor ice would most likely be

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