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 (D)</p> Signup and view all the answers

How are oil pressure indication systems typically calibrated?

<p>In imperial or metric values (D)</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 (A)</p> Signup and view all the answers

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

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

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

<p>Pratt &amp; Whitney (D)</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 (D)</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 (B)</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 (D)</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 (D)</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 (B)</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 (A)</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 (C)</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 (B)</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 (C)</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 (C)</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 (A)</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 (C)</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 (A)</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 (A)</p> Signup and view all the answers

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

<p>Cockpit indicator (B)</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 (A)</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 (A)</p> Signup and view all the answers

What do engine condition instruments help operators do?

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

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

<p>Low oil quantity (D)</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 (B)</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 (A)</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 (C)</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 (A)</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 (D)</p> Signup and view all the answers

What parameter do oil temperature instruments primarily help monitor?

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

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

<p>Compressor discharge total pressure (B)</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 (C)</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 (B)</p> Signup and view all the answers

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

<p>Horsepower (A)</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. (C)</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. (D)</p> Signup and view all the answers

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