GTS Mod 8 Moderate
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Questions and Answers

What drives the tachometer generator in the compressor speed indicating system?

  • The cockpit indicator
  • The oil pressure indication systems
  • The oil temperature instruments
  • The engine (correct)
  • Where is the tachometer generator usually mounted in the compressor speed indicating system?

  • At the cockpit indicator
  • Connected to an oil pressure indicator
  • On the oil cooler outlet
  • On an engine accessory gearbox (correct)
  • What do oil temperature instruments indicate about the oil cooling system?

  • Oil pressure readings
  • Operating correctly (correct)
  • Engine speed
  • Cockpit indication
  • Which part of the compressor speed indicating system is connected to an oil temperature bulb in most systems?

    <p>Cockpit indicator</p> Signup and view all the answers

    How are oil pressure indication systems typically calibrated?

    <p>In imperial or metric values</p> Signup and view all the answers

    What is the main purpose of performance instruments in an engine cockpit?

    <p>Monitor engine output or performance at a glance</p> Signup and view all the answers

    In the EPR system, what are engine stations used for?

    <p>Identifying engine pressure tap-off points</p> Signup and view all the answers

    Which company uses station Pt2 and station Pt7 to identify EPR tapoff points?

    <p>Pratt &amp; Whitney</p> Signup and view all the answers

    What type of pressures are typically sensed by a pressure transmitter in a typical EPR system?

    <p>Compressor inlet and turbine discharge pressures</p> Signup and view all the answers

    What signal does the transmitter generate for the cockpit EPR indicator in the EPR system?

    <p>Signal based on compressor inlet and turbine discharge pressures</p> Signup and view all the answers

    What is the purpose of gas temperature indicators in an engine?

    <p>To monitor gas temperature during critical engine phases</p> Signup and view all the answers

    Why are multiple temperature probes used in an engine gas temperature indicating system?

    <p>To ensure accurate temperature sensing</p> Signup and view all the answers

    What is the advantage of having a series of thermocouples in an engine temperature indicating system?

    <p>To provide redundancy and accuracy</p> Signup and view all the answers

    In an engine gas temperature indicating system, what happens when a single thermocouple encounters a combustor hot spot?

    <p>The system produces an erroneous indication</p> Signup and view all the answers

    How does a multi-probe system ensure accurate readings even if one probe becomes unserviceable?

    <p>By averaging signals from multiple probes</p> Signup and view all the answers

    What is the purpose of monitoring oil pressure indicators during cold engine starts?

    <p>To ensure maximum oil pressure is not exceeded</p> Signup and view all the answers

    Why do operators need to limit engine power until oil temperature rises and pressure drops to prescribed values?

    <p>To prevent damage to seals</p> Signup and view all the answers

    What does a trend towards increasing oil pressure indicate during normal operation?

    <p>A restriction within the lubrication circuit</p> Signup and view all the answers

    Why would a cockpit indicator for inlet air temperature be important for aircrew in some aircraft?

    <p>To warn of possible inlet icing conditions</p> Signup and view all the answers

    How can an inlet air temperature indicator help operators when utilising fan speed or torque figures for engine performance?

    <p>By enabling calculation of the engine's workload</p> Signup and view all the answers

    What is the purpose of an engine vibration indicator system?

    <p>To alert aircrew of abnormal engine vibrations</p> Signup and view all the answers

    Why might a change in vibration due to an impending failure go unnoticed by aircrew in a turbojet engine?

    <p>Because turbojet engines normally have low vibration levels</p> Signup and view all the answers

    What component in the engine vibration system is responsible for displaying vibration levels?

    <p>Cockpit indicator</p> Signup and view all the answers

    Which system is NOT part of the typical setup shown in this figure for monitoring engine vibrations?

    <p>Oil temperature instruments</p> Signup and view all the answers

    In engine trend monitoring, what is the basis for determining the engine's performance consistency?

    <p>The consistency with prescribed performance figures</p> Signup and view all the answers

    What do engine condition instruments help operators do?

    <p>Troubleshoot engine issues</p> Signup and view all the answers

    Why might an operator notice a drop in engine oil pressure?

    <p>Low oil quantity</p> Signup and view all the answers

    How do operators deduce the relationship between low oil quantity, high oil temperature, and low oil pressure based on the cockpit indicators?

    <p>By noting low oil quantity and high oil temperature</p> Signup and view all the answers

    If a pilot observes a high torque indication from the left-hand engine in a twin-engine helicopter, what should be the pilot's next step?

    <p>Scan the condition instruments of the right-hand engine</p> Signup and view all the answers

    What is the purpose of cockpit indicators like tachometer generator and compressor speed indicating system in relation to engine monitoring?

    <p>To display essential information regarding engine performance</p> Signup and view all the answers

    What is the primary purpose of the compressor speed indicating system?

    <p>To indicate the speed of the compressor</p> Signup and view all the answers

    How do tachometer generators function in the context of engine instruments?

    <p>By converting engine speed into electrical signals</p> Signup and view all the answers

    What parameter do oil temperature instruments primarily help monitor?

    <p>Oil cooling system efficiency</p> Signup and view all the answers

    How are oil pressure indication systems beneficial for aircraft operations?

    <p>By monitoring the health of the engine lubrication system</p> Signup and view all the answers

    Which parameter is NOT typically indicated by cockpit engine condition instruments?

    <p>Compressor discharge total pressure</p> Signup and view all the answers

    What might a discrepancy between exhaust gas temperature indications in multi-engine aircraft suggest?

    <p>An inefficient fuel control system</p> Signup and view all the answers

    How do modern aircraft differ regarding cockpit indicators compared to traditional ones?

    <p>Modern aircraft utilize multi-functional digital displays</p> Signup and view all the answers

    What is the primary parameter used as a power indication for turbo-propeller engines?

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

    What is a significant advantage of using Engine Pressure Ratio (EPR) for jet engines?

    <p>It considers both turbine and compressor pressures.</p> Signup and view all the answers

    What potential issue might a pilot face if cockpit indicators fail to provide accurate engine performance data?

    <p>Difficulty in setting engine power for take-off.</p> Signup and view all the answers

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