GTS MOD2 Gas Turbine Engine Fuel Systems Quiz

What is the function of the engine speed governor?

To maintain a steady governed state

How does the pilot servo valve rod affect roller cage position?

By compressing a spring

What happens when the power lever is moved in an increase direction?

The spring cap moves up the pilot servo valve rod

How does the pilot servo valve slow down the movement of the pilot servo control rod?

By restricting fluid displacement top to bottom Signup and view all the answers

What does compressing the flyweight speeder spring lead to?

Under-speed condition Signup and view all the answers

How is the roller cage position affected by a decrease in engine speed?

It moves downwards and to the left Signup and view all the answers

What is the role of the multiplying linkage when the engine returns to a steady governed state?

To stabilize engine speed Signup and view all the answers

What is the purpose of a bypass valve in a fuel filter assembly?

To allow fuel flow to continue if the filter element is blocked Signup and view all the answers

How are disposable fuel filter elements typically managed during maintenance?

They are discarded and replaced with new elements Signup and view all the answers

What action is taken if wear debris or unusual contaminants are found during the examination of a fuel filter element?

Investigation of the upstream fuel system is initiated Signup and view all the answers

Where is a high pressure fuel filter disc assembly typically located?

After the engine-driven fuel pump Signup and view all the answers

What does a fuel pressure differential switch measure?

Differential pressure between the inlet and outlet sides of a fuel filter Signup and view all the answers

How are high pressure fuel filter elements typically managed during maintenance?

Cleaned and reinstalled without replacement Signup and view all the answers

What is the purpose of a fuel pressure differential switch?

To measure differential pressure across a fuel filter Signup and view all the answers

What is the advantage of a variable displacement engine-driven fuel pump over a spur gear pump?

Enhanced fuel scheduling Signup and view all the answers

In a low-pressure application, what type of engine fuel filter is typically used?

Strainer filter Signup and view all the answers

Why is burner pressure sensed and signalled to a FCU?

To adjust fuel flow Signup and view all the answers

How is the metering valve controlled in a hydro-pneumatic FCU?

By oil pressure feedback Signup and view all the answers

What effect does air inlet temperature and pressure have on fuel scheduling within a FCU?

Affects fuel-air ratio Signup and view all the answers

Describe the operation of a fuel cooled oil cooler.

It cools the oil using fuel. Signup and view all the answers

What is the purpose of an integrated fuel flow transmitter?

To monitor fuel consumption Signup and view all the answers

Describe the function of a fuel pressurising and dump valve.

'Dumps' excess pressurized fuel to prevent overheating. Signup and view all the answers

What type of fuel pumps are commonly used in aircraft engines?

'Positive displacement' and 'centrifugal' pumps Signup and view all the answers

What role does a flow control hydro-mechanical FCU play when an aircraft is climbing with the engine under steady-state governed conditions?

Increases fuel flow to boost power output Signup and view all the answers

What happens to the burner pressure as the engine slows down?

Decreases Signup and view all the answers

How does the fuel flow change when the multiplying linkage moves further to the right?

Increases Signup and view all the answers

What occurs when the flyweight force reaches equilibrium with the speeder spring force?

The flyweights move back to upright position Signup and view all the answers

In what position are the flyweights after they return to an upright position?

Positioned to act on the next speed change Signup and view all the answers

What must be done before shutting down the engine with respect to turbine cooling?

Gradual turbine cooling at idle Signup and view all the answers

When is the fuel shut-off valve closed during the shutdown procedure?

At idle governed speed Signup and view all the answers

What is an essential step in engine shutdown according to the text?

'Stabilising' the engine at idle for turbine cooling Signup and view all the answers