2.1 Laboratory Quiz_ Aircraft Systems_ ASCI 121L Airmen Knowledge Test Prep - Mar 2024 - Online

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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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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 4/8 The fuel/air mixture becomes leaner. A decrease in RPM results from the lean mixture. Correct! The fuel/air mixture becomes richer. Carburetors are normally calibrated at sea level pressure to meter the correct fuel/air mixture. As altitude increases, air density decreases and the amount of fuel is too great for the amount of air -- the mixture is 'too rich.' This same result may be brought about by the application of carburetor heat. The heated air entering the carburetor has less density than unheated air and the fuel/air mixture is enriched.  Question 11 4 / 4 pts Correct! Adjust for proper RPM and check for desired indications on the engine gauges. Test each brake and the parking brake. Place the magneto or ignition switch momentarily in the OFF position to check for proper grounding. As soon as the engine starts, check for unintentional movement of the aircraft and set power to the recommended warm-up RPM. The oil pressure should then be checked to determine that the oil system is functioning properly with pressure at recommended levels within the manufacturer's time limit.  Question 12 4 / 4 pts low as 0°F and the relative humidity is high. Correct! high as 70°F and the relative humidity is high. high as 95°F and there is visible moisture. If the temperature is between -7°C (20°F) and 21°C (70°F) with visible moisture or high humidity, the pilot should be constantly on the alert for carburetor ice.  Question 13 4 / 4 pts probably experience engine failure due to the loss of the engine-driven fuel pump and also experience failure of the radio equipment, lights, and all instruments that require alternating current. Correct! experience avionics equipment failure. probably experience failure of the engine ignition system, fuel gauges, aircraft lighting system, and avionics equipment. If you experience an in-flight electrical system failure, you would have an avionics equipment failure, and you could not use your electrical fuel boost pump.  What change occurs in the fuel/air mixture when carburetor heat is applied? What should be the first action after starting an aircraft engine? The possibility of carburetor icing exists even when the ambient air temperature is as An electrical system failure (battery and alternator) occurs during flight. In this situation, you would

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 5/8 Question 14 4 / 4 pts apply carburetor heat. lean the mixture. Correct! lower the nose slightly to increase airspeed. To prevent detonation, the pilot should use the correct grade of fuel, maintain a sufficiently rich mixture, open the throttle smoothly, and keep the temperature of the engine within recommended operating limits. Some aircraft have an automatically enriched mixture for enhanced cooling in takeoff and climb-out at full throttle. Lowering the nose will allow the aircraft to gain airspeed, which eventually lowers the engine temperature.  Question 15 4 / 4 pts clockwise rotation of the engine and the propeller turning the airplane counter-clockwise. Correct! propeller blade descending on the right, producing more thrust than the ascending blade on the left. gyroscopic forces applied to the rotating propeller blades acting 90° in advance of the point the force was applied. The downward-moving blade on the right side of the propeller has a higher angle of attack and greater action and reaction than the upward moving blade on the left. This results in a tendency for the airplane to yaw around the vertical axis to the left.  Question 16 4 / 4 pts Reduce climb speed and increase RPM. Correct! Reduce rate of climb and increase airspeed. Increase climb speed and increase RPM. To avoid excessive cylinder head temperatures, a pilot can open the cowl flaps, increase airspeed, enrich the mixture, or reduce power. Any of these procedures will aid in reducing the engine temperature. Establishing a shallower climb (increasing airspeed) increases the airflow through the cooling system, reducing high engine temperatures.  Question 17 4 / 4 pts avoid high RPM settings with high manifold pressure. always use a rich mixture with high RPM settings. Correct! avoid high manifold pressure settings with low RPM. 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. If a pilot suspects that the engine (with a fixed-pitch propeller) is detonating during climb-out after takeoff, the initial corrective action to take would be to The left turning tendency of an airplane caused by P-factor is the result of the What action can a pilot take to aid in cooling an engine that is overheating during a climb? A precaution for the operation of an engine equipped with a constant-speed propeller is to

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 6/8 On most airplanes, for any given RPM, there is a manifold pressure that should not be exceeded. If an excessive amount of manifold pressure is carried for a given RPM, the maximum allowable pressure within the engine cylinders could be exceeded, thus putting undue strain on them.  Question 18 4 / 4 pts not affect the fuel/air mixture. Correct! enrich the fuel/air mixture. result in more air going through the carburetor. Carburetors are normally calibrated at sea level pressure to meter the correct fuel/air mixture. As altitude increases, air density decreases and the amount of fuel is too great for the amount of air -- the mixture is 'too rich.' This same result may be brought about by the application of carburetor heat. The heated air entering the carburetor has less density than unheated air and the fuel/air mixture is enriched.  Question 19 4 / 4 pts Correct! too much power and with the mixture set too lean. the mixture set too rich. higher-than-normal oil pressure. Excessively high engine temperatures can 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 20 4 / 4 pts Correct! improved engine performance. uniform heat distribution. balanced cylinder head pressure. The dual ignition system has two magnetos to supply the electrical current to two spark plugs for each combustion chamber. This provides both a redundancy of ignition and an improvement of engine performance.  Question 21 4 / 4 pts fuel strainer drain. lowest point in the fuel system. Correct! Applying carburetor heat will If the engine oil temperature and cylinder head temperature gauges have exceeded their normal operating range, the pilot may have been operating with One purpose of the dual ignition system on an aircraft engine is to provide for To properly purge water from the fuel system of an aircraft equipped with fuel tank sumps and a fuel strainer quick drain, it is necessary to drain fuel from the

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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 7/8 fuel strainer drain and the fuel tank sumps. Many aircraft are equipped with fuel strainers located at the lowest point in the fuel lines and sump drains installed at the lowest point in each fuel tank. In order to completely purge all of the liquid water from the fuel system, the fuel strainer drain and the sumps in all of the tanks must be drained.  Question 22 4 / 4 pts When at high airspeeds. When at low angles of attack. Correct! When at high angles of attack. The effects of P-factor, or asymmetric propeller loading, usually occur when the airplane is flown at high angles of attack (or a high deck angle for a PPC) and at high power settings.  Question 23 4 / 4 pts increase engine performance. Correct! decrease engine performance. have no effect on engine performance. Use of carburetor heat tends to reduce the output of the engine and also to increase the operating temperature.  Question 24 4 / 4 pts less susceptible to icing. Correct! more susceptible to icing. equally susceptible to icing. Fuel injection systems are less susceptible to icing than carburetor systems because of the lack of the temperature drop caused by the venturi in a carburetor. Be aware that one can acquire carburetor ice even without easily visible moisture and, in the right circumstances, even at full power.  Question 25 4 / 4 pts Low airspeed, low power, low angle of attack. High airspeed, high power, high angle of attack. Correct! When does P-factor cause the airplane to yaw to the left? Generally speaking, the use of carburetor heat tends to With regard to carburetor ice, float-type carburetor systems in comparison to fuel injection systems are generally considered to be In what flight condition is torque effect the greatest in a single-engine airplane?

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 8/8 Low airspeed, high power, high angle of attack. The effect of torque increases in direct proportion to the engine power, airspeed, and airplane attitude. If the power setting is high, the airspeed slow, and the angle of attack high (or a high deck angle for a PPC), the effect of torque is greater. Quiz Score: 96 out of 100

2.1 Laboratory Quiz_ Aircraft Systems_ ASCI 121L Airmen Knowledge Test Prep - Mar 2024 - Online

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