Module 14. Propulsion1) A fuel flow transmitter requires a motor or a synchronous motor to have a constant voltage within small tolerances constant frequency within small tolerances low EMF as it is immersed in fuel2) An increase in fuel flow through the impeller type fuel flow transmitter is measured by drum lags impeller impeller lags turbine decreasing angle between the two3) An aircraft flying at 800mph would typically use turbojet turbofan turboprop4) A thermocouple indication is taken from the hot junction cold junction difference between the hot junction and the cold junction5) An EPR system reads slightly over 1, this would mean the transmitter datum point has moved and needs replacing no action required this is normal the indicator needs re-calibrating back to 16) Propeller torque is analogous to engine RPM shaft horsepower propeller RPM7) The variable bleed valves on a engine at start up is open closed modulating8) The fuel metering unit has direct inputs via only the EEC the EEC and the fire control handle the EEC, fire control handle and the engine master switch9) When using a test set to test an EGT thermocouple circuit no compensation for ambient temperature is required only consider ambient temperature compensation if the ambient temperature is over 20oC always compensate for ambient temperature10) EPR is a ratio of

P1 to P4 P1 to Pfan P1 to P611) in a flow type fuel system, fuel shutoff is done by mechanical ball valve fcu torque motor l.p fuel cock12) How is fuel flow varied in a variable displacement pressure type pump? Alter the camplate angle Remote servo pressure Direct cable to camplate13) A short circuit in a d.c ratiometer will give max scale reading zero scale reading min scale reading14) Propeller speed is measured from a slip ring pulse probe a tachometer on the LP turbine shaft a pulse probe at the engine side of the reduction gear15) How are the combustion chambers cooled? By l.p compressor air By h.p compressor air By fan pressure air16) Oil systems consists of 2 systems 3 systems 4 systems17) The inlet of a turbo fan is divergent convergent convergent-divergent18) Manifold pressure is measured at inlet port above and below ambient conditions at inlet port above and below standard atmosphere at sea level at inlet port indicating boost pressure19) When using a test set to test an EGT thermocouple circuit no compensation for ambient temperature is required only consider ambient temperature compensation if the ambient temperature is over 20oC always compensate for ambient temperature20) The inlet of a turbo fan is divergent convergent convergent-divergent