GTS Mod 3 Moderate
40 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the likely cause of increasing RGB oil pressure?

  • Debris lodged in the oil galleries (correct)
  • Failure of the system pressure relief valve
  • Excessive oil flow to the planetary gear system
  • Lack of oil mist in the accessory drive train
  • Where does the oil mist come from to lubricate the accessory drive train?

  • Filter outlet
  • Main scavenge pump (correct)
  • Propeller brake
  • System pressure relief valve
  • How is the RGB scavenge system divided?

  • By the propeller shaft
  • By the planetary gear system
  • By a bearing diaphragm (correct)
  • By the system pressure relief valve
  • What are the two pumps used to effectively scavenge the RGB?

    <p>Nose scavenge pump and main scavenge pump</p> Signup and view all the answers

    At what pressure does the system pressure relief valve begin to open?

    <p>250 PSI</p> Signup and view all the answers

    What is the purpose of the check valve in the RGB oil system?

    <p>Prevent oil tank drainage into the RGB during engine shutdown</p> Signup and view all the answers

    How is the oil returned to the accessory gearbox after being removed by the breather?

    <p>Through the uppermost vertical strut of the air inlet housing</p> Signup and view all the answers

    In what scenario would the filter bypass in the RGB pump and filter assembly open?

    <p>When filter outlet pressure reaches 300 PSI</p> Signup and view all the answers

    What ensures that oil does not drain into the RGB from the oil tank when the engine is not running?

    <p>The check valve in the filter assembly</p> Signup and view all the answers

    How is the RGB (Reduction Gearbox Assembly) pump pressure typically regulated?

    <p>By restrictions in the oil galleries within the RGB</p> Signup and view all the answers

    What is the function of the nose scavenge pump?

    <p>Scavenges oil from the propeller shaft bearings</p> Signup and view all the answers

    Where is the main scavenge pump located?

    <p>Inside the reduction gear assembly</p> Signup and view all the answers

    What does the pressure relief valve in the scavenge system do?

    <p>Relieves pressure at 250 PSI</p> Signup and view all the answers

    When is the nose scavenge pump particularly active in scavenging oil?

    <p>When the aircraft is in a nose down attitude</p> Signup and view all the answers

    Where does the scavenged oil from the power section and RGB systems pass before combining?

    <p>Magnetic chip detectors</p> Signup and view all the answers

    What is the purpose of the external scavenge oil filter in the RGB and power section?

    <p>To prevent contamination of the power section oil system components.</p> Signup and view all the answers

    What is the function of the bypass valve in the external scavenge oil filter?

    <p>Operates when the filter becomes blocked to allow oil flow.</p> Signup and view all the answers

    How does the fuel cooled oil cooler contribute to preventing ice crystals from entering the fuel system components?

    <p>By providing a means to transfer waste heat from scavenged oil to incoming fuel.</p> Signup and view all the answers

    What is the range within which the bypass valve in the external scavenge oil filter operates?

    <p>30 PSID and 50 PSID</p> Signup and view all the answers

    Why is an air cooled oil cooler used after the fuel cooled oil cooler in the oil return path?

    <p>To cool down the scavenged oil before it enters the oil tank.</p> Signup and view all the answers

    What is the main function of a cyclonic breather?

    <p>Create a cyclonic flow pattern to separate oil from air</p> Signup and view all the answers

    How does a cyclonic breather separate oil from air?

    <p>By creating a swirling flow pattern</p> Signup and view all the answers

    What is the role of a temperature transmitter in an oil system?

    <p>Sense oil temperature and transmit a signal</p> Signup and view all the answers

    Which component accurately senses oil temperature?

    <p>Temperature transmitter</p> Signup and view all the answers

    What happens to oil in a cyclonic breather after separation from air?

    <p>It settles at the bottom of the separator cylinder for drainage</p> Signup and view all the answers

    What is the purpose of the delivery element in the power section oil pump?

    <p>To pump oil through passages in the accessory gearbox</p> Signup and view all the answers

    What is the function of the bypass valve in the oil system?

    <p>To allow oil to bypass the filter if it becomes blocked</p> Signup and view all the answers

    When does the check valve open in the system?

    <p>Within the range of 6–10 PSI</p> Signup and view all the answers

    Which component prevents excessive back-pressure at the power section oil pump outlet?

    <p>Bypass valve</p> Signup and view all the answers

    Where does the oil enter after passing through the filter assembly in the oil flow path?

    <p>Annular ring formed by the air inlet housing and the compressor extension shaft housing</p> Signup and view all the answers

    What is the purpose of a system pressure relief valve in an aircraft engine?

    <p>To prevent excessive pressure build-up in the lubrication system</p> Signup and view all the answers

    How does a direct lubrication oil jet system differ from a mist and vapour lubrication oil jet system?

    <p>The mist and vapour system covers a wider lubrication area compared to the direct system</p> Signup and view all the answers

    What is the main function of breathers in an engine's oil scavenge system?

    <p>To prevent excess air pressure build-up in the oil scavenge system</p> Signup and view all the answers

    In what way does an under race lubrication jet system improve cooling?

    <p>By routing oil through rotor shafts and bearing journals before reaching the bearings</p> Signup and view all the answers

    What role do compressor bleed air play in some engines' lubrication systems?

    <p>Delivering a mist and vapour lubrication oil spray through a mist and vapour lubrication oil jet</p> Signup and view all the answers

    How are slot acting oil jets utilized in bearing inner races different from conventional spray jet lubrication?

    <p>They provide a mist and vapour lubrication instead of direct spraying</p> Signup and view all the answers

    Why is a wider area of lubrication preferred in some large engines?

    <p>To enhance cooling efficiency during high mechanical loads</p> Signup and view all the answers

    What could be a consequence of an undesirable build-up of air pressure in an engine's oil scavenge system?

    <p>Insufficient lubrication of moving parts, causing premature wear</p> Signup and view all the answers

    What is the primary benefit of using compressor bleed air for some engines' lubrication systems?

    <p>To deliver air/oil mist spray for wider area lubrication</p> Signup and view all the answers

    What differentiates a direct lubrication oil jet system from an under race lubrication jet system?

    <p>The under race system routes oil through rotor shafts before reaching bearings</p> Signup and view all the answers

    More Like This

    GTS Mod 3 Easy
    17 questions

    GTS Mod 3 Easy

    EnterprisingMagnolia avatar
    EnterprisingMagnolia
    GTS Mod 3 Difficult
    18 questions

    GTS Mod 3 Difficult

    EnterprisingMagnolia avatar
    EnterprisingMagnolia
    Aircraft Oil Pressure Monitoring Systems
    5 questions
    Use Quizgecko on...
    Browser
    Browser