Reciprocating Engine Starting Procedures Quiz
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Questions and Answers

Which procedure should be followed before attempting to start a reciprocating engine?

  • Use external sources of electrical power
  • Check the ignition switch for off
  • Refer to the manufacturer's instructions (correct)
  • Remove all unnecessary electrical equipment

    • What is a potential consequence of using force to turn the propeller when a hydraulic lock is detected?

  • Causing a hydraulic lock
  • Stopping the engine abruptly
  • Bending or breaking a connecting rod (correct)
  • Damaging the ignition switch

    • When starting engines equipped with electric starters, what should be used to eliminate an excessive burden on the aircraft battery?

  • Engine heating
  • Removal of unnecessary electrical equipment
  • Oil dilution
  • External sources of electrical power (correct)

    • What is the purpose of turning the propeller three or four complete revolutions by hand before starting a radial engine?

    <p>To detect a hydraulic lock</p> Signup and view all the answers

    What should be done if a hydraulic lock is detected in a radial engine?

    <p>Remove either the front or rear spark plug from the lower cylinders and pull the propeller through</p> Signup and view all the answers

    Which action should be taken if a hung start occurs during the starting of a turbine powerplant using a compressed air starter?

    <p>Shut the engine down.</p> Signup and view all the answers

    Approximately how far does the hazard area extend forward of an idling jet engine?

    <p>D- 25 feet</p> Signup and view all the answers

    Which of the following is the most satisfactory extinguishing agent for use on a carburetor or intake fire?

    <p>C- Carbon dioxide.</p> Signup and view all the answers

    What should you do if the engine is flooded or over primed?

    <p>Turn the ignition switch off and move the throttle to the 'full open' position</p> Signup and view all the answers

    How do air cooled reciprocating engines maintain proper cooling during ground operation?

    <p>By depending on the forward speed of the aircraft</p> Signup and view all the answers

    Which of the following is NOT a function of an APU?

    <p>Generating thrust for aircraft propulsion</p> Signup and view all the answers

    Which of the following is the most likely cause of a hot start in an engine?

    <p>Excessive fuel/air mixture entering the combustion chamber</p> Signup and view all the answers

    Which action should be taken if a hot start is detected in an engine?

    <p>Shut off the fuel to the engine immediately</p> Signup and view all the answers

    Which of the following best describes a false or hung start in an engine?

    <p>The engine starts normally but the rpm remains at a low value</p> Signup and view all the answers

    What should be done if a false or hung start occurs during engine starting?

    <p>Shut the engine down</p> Signup and view all the answers

    Which type of aviation fuel is used in reciprocating engine aircraft?

    <p>AVGAS</p> Signup and view all the answers

    What do the two numbers in the fuel grade of AVGAS indicate?

    <p>The lean mixture and rich mixture octane rating numbers</p> Signup and view all the answers

    What can happen if jet fuel is added to AVGAS in a reciprocating engine?

    <p>Decrease in engine power</p> Signup and view all the answers

    What can happen if AVGAS is added to jet fuel in a turbine engine?

    <p>Decreased service life of the turbine engine</p> Signup and view all the answers

    Which color is 100LL fuel?

    <p>A- blue</p> Signup and view all the answers

    Which of the following is NOT a consequence of microbial growth in fuel?

    <p>Improved fuel combustion</p> Signup and view all the answers

    What is the primary cause of microbial growth in fuel?

    <p>Moisture in the fuel</p> Signup and view all the answers

    What is the main concern regarding static electricity and aviation fuel?

    <p>The static electricity generated during flight can cause a spark and ignite vaporized fuel</p> Signup and view all the answers

    What is the potential harm of breathing in fuel vapors?

    <p>Breathing in fuel vapors can be harmful and should be limited</p> Signup and view all the answers

    Which method can be used to accomplish defueling an aircraft?

    <p>Both gravity defueling and pumping method</p> Signup and view all the answers

    What should be checked before defueling an aircraft?

    <p>Maintenance/service manual</p> Signup and view all the answers

    What should be observed when servicing an aircraft with ground electrical power units?

    <p>All electrical safety precautions</p> Signup and view all the answers

    When should a power unit never be moved?

    <p>When service cables are attached to an aircraft or when the generator system is engaged</p> Signup and view all the answers

    What can a hydraulic power unit be used for during aircraft maintenance?

    <p>All the above</p> Signup and view all the answers

    What is the primary source of power for a portable hydraulic test unit?

    <p>Electricity</p> Signup and view all the answers

    Which of the following is the primary purpose of air carts in aircraft ground operations?

    <p>To provide low-pressure air for starting the engines</p> Signup and view all the answers

    Which type of oxygen should be used in aircraft breathing oxygen systems?

    <p>Aviator’s Breathing Oxygen</p> Signup and view all the answers

    What can happen if industrial oxygen is used in aircraft breathing oxygen systems?

    <p>It can cause the pilot, crew, and/or passengers to become sick.</p> Signup and view all the answers

    Why should aircraft be serviced with oxygen outside hangars?

    <p>All the above</p> Signup and view all the answers

    Which of the following is the primary purpose of adding ethylene dibromide to aviation gasoline?

    <p>To scavenge lead oxide from the cylinder combustion chambers</p> Signup and view all the answers

    What is the purpose of adding ethylene dibromide to aviation gasoline?

    <p>To increase the antiknock rating of the fuel</p> Signup and view all the answers

    Which of the following can be caused by a fuel that vaporizes too readily?

    <p>C- Vapor lock</p> Signup and view all the answers

    Which of the following is a characteristic of aviation gasoline?

    <p>High heat value, high volatility</p> Signup and view all the answers

    BONUS: What knowledge do maintenance technicians need to possess in order to safely service and operate aircraft?

    <p>All the above</p> Signup and view all the answers

    Study Notes

    Hand Propping an Engine

    • To start an engine without a self-starter, turn the propeller by hand while calling out "Fuel on, switch off, throttle closed, brakes on" to ensure safety checks.
    • The operator must repeat the phrase and wait for "contact" to be called before turning on the switch.

    Safety Precautions for Hand Propping

    • Always assume the ignition is on when touching a propeller.
    • Ensure the ground is firm to avoid slips and falls into the propeller.
    • Keep your body away from the propeller, even when the engine is not being cranked.
    • Stand close enough to step away quickly as the propeller is pulled down.
    • Move the blade downward by pushing with the palms of your hands, rather than gripping with fingers.

    Contamination in Aviation Fuel

    • Contamination can lead to engine failure or stoppage, and loss of life.
    • Common contaminants include water, solids, and microbial growths.
    • Water can exist in two forms: dissolved (vapor) and free water, which can lead to ice crystal formation and clogging of filters.
    • Solid contaminants include rust, dirt, sand, and other particles that can damage fuel controls.
    • Microbiological growths can occur in jet fuel and are introduced through fueling and airborne/soil-based organisms.

    Ground Support Electrical APUs

    • Ground support electrical APUs vary in size and type, including towed, stationary, and self-propelled units.
    • Stationary units are used in-hangar during maintenance, while movable units are used on the flight line.
    • Towed units vary in size and power output, with smaller units using high-capacity batteries and larger units equipped with generators.
    • Self-propelled units are more expensive and supply a wider range of output voltages and frequencies.

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    Description

    Test your knowledge of starting procedures for reciprocating engines and learn about the variations in methods used. Remember to always refer to the manufacturer's instructions for the correct procedures.

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