GTS Mod 8 Moderate

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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?

Cockpit indicator Signup and view all the answers

How are oil pressure indication systems typically calibrated?

In imperial or metric values Signup and view all the answers

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

Monitor engine output or performance at a glance Signup and view all the answers

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

Identifying engine pressure tap-off points Signup and view all the answers

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

Pratt & Whitney Signup and view all the answers

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

Compressor inlet and turbine discharge pressures Signup and view all the answers

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

Signal based on compressor inlet and turbine discharge pressures Signup and view all the answers

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

To monitor gas temperature during critical engine phases Signup and view all the answers

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

To ensure accurate temperature sensing Signup and view all the answers

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

To provide redundancy and accuracy Signup and view all the answers

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

The system produces an erroneous indication Signup and view all the answers

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

By averaging signals from multiple probes Signup and view all the answers

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

To ensure maximum oil pressure is not exceeded Signup and view all the answers

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

To prevent damage to seals Signup and view all the answers

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

A restriction within the lubrication circuit Signup and view all the answers

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

To warn of possible inlet icing conditions 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?

By enabling calculation of the engine's workload Signup and view all the answers

What is the purpose of an engine vibration indicator system?

To alert aircrew of abnormal engine vibrations 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?

Because turbojet engines normally have low vibration levels Signup and view all the answers

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

Cockpit indicator Signup and view all the answers

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

Oil temperature instruments Signup and view all the answers

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

The consistency with prescribed performance figures Signup and view all the answers

What do engine condition instruments help operators do?

Troubleshoot engine issues Signup and view all the answers

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

Low oil quantity 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?

By noting low oil quantity and high oil temperature 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?

Scan the condition instruments of the right-hand engine 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?

To display essential information regarding engine performance Signup and view all the answers

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

To indicate the speed of the compressor Signup and view all the answers

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

By converting engine speed into electrical signals Signup and view all the answers

What parameter do oil temperature instruments primarily help monitor?

Oil cooling system efficiency Signup and view all the answers

How are oil pressure indication systems beneficial for aircraft operations?

By monitoring the health of the engine lubrication system Signup and view all the answers

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

Compressor discharge total pressure Signup and view all the answers

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

An inefficient fuel control system Signup and view all the answers

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

Modern aircraft utilize multi-functional digital displays Signup and view all the answers

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

Horsepower Signup and view all the answers

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

It considers both turbine and compressor pressures. Signup and view all the answers

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

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