Free access to EASA ECQB 2022!


A CSD unit which has been disconnected in flight ? Review > pilot

exemple question 155
May be reset on ground only after engine shut down.


Because of the input/output relationship of an OR gate it is often referred to as the ?

exemple question 156
Because of input/output relationship of an or gate it often referred to as May be reset on ground only after engine shut down.


Connecting two 12 volt 40 ampere hour capacity batteries in series will result in a total voltage and capacity respectively of ?

exemple question 157
Connecting two 12 volt 40 ampere hour capacity batteries in series will result in a total voltage and capacity respectively of 24 volts 4 ampere hours.


exemple question 158
When a conductor cuts flux of a magnetic field An electromotive force (emf) induced in conductor.


exemple question 159
In order that dc generators will achieve equal load sharing when operating in parallel it necessary to ensure that Their voltages are almost equal. When two dc generators are operating in parallel control of load sharing achieved an equalising circuit which in conjunction with voltage regulators varies field excitation current of generators.


exemple question 160
The purpose of a voltage regulator to control output voltage of Generator at varying loads speeds. For dc generators voltage regulation achieved changing voltage in voltage coil which changes carbon pile pressure which changes current in shunt field this then the reactive load (wasted power) that adjusts energising current the same principle applies in ac generators (alternators) but they use solid state circuitry.


exemple question 161
A current limiter fuse in a dc generation system used to Allow a short term overload before rupturing. A fuse a deliberately weak part of a circuit that designed to fail if a problems occurs current limiters are like fuses but with a much higher melting point so that a higher overload current can be carried (they allow a short term overload) they will limit current to a predetermined value are used heavy duty circuits.


8
A 3 phase ac generator has 3 separate stator windings spaced at Allow a short term overload before rupturing. A fuse a deliberately weak part of a circuit that designed to fail if a problems occurs current limiters are like fuses but with a much higher melting point so that a higher overload current can be carried (they allow a short term overload) they will limit current to a predetermined value are used heavy duty circuits.


9
A csd unit normally provided with means of monitoring during flight Oil temperature pressure. A fuse a deliberately weak part of a circuit that designed to fail if a problems occurs current limiters are like fuses but with a much higher melting point so that a higher overload current can be carried (they allow a short term overload) they will limit current to a predetermined value are used heavy duty circuits.


10
The phase relationship between two unparalleled ac generators Oil temperature pressure. A fuse a deliberately weak part of a circuit that designed to fail if a problems occurs current limiters are like fuses but with a much higher melting point so that a higher overload current can be carried (they allow a short term overload) they will limit current to a predetermined value are used heavy duty circuits.


11
Assuming a csd fault indicated csd should be disconnected Provided engine running. The function of a constant speed drive (csd) to ensure that ac generator produces a constant frequency in case of csd fault you must disconnect it (if engine running if not since ac generator not rotating you don't need to disconnect it) a csd unit which has been disconnected may be reset on ground only after engine shut down.


12
Ac generators operated in parallel must have same Provided engine running. Two ac generators operated in parallel must be not only at same speed (voltage) but also same phase to be paralleled.


13
The measured output power components of a constant frequency ac system are Provided engine running. Two ac generators operated in parallel must be not only at same speed (voltage) but also same phase to be paralleled.


14
'frequency wil in relation to a ac generation system means generator Output frequency varies with engine speed. Two ac generators operated in parallel must be not only at same speed (voltage) but also same phase to be paralleled.


15
When ac voltage across a capacitor kept constant and frequency increased current through capacitor will Output frequency varies with engine speed. Capacitive reactance when frequency tends to zero current magnitude almost equal to zero at contrary when fequency high this the magnitude of voltage which tends to zero we are talking about capacitive reactance xc expresses in ohm.


16
In an aeroplane fitted with a constant frequency ac power supply dc power obtained from a Transformer rectifier unit (tru). Capacitive reactance when frequency tends to zero current magnitude almost equal to zero at contrary when fequency high this the magnitude of voltage which tends to zero we are talking about capacitive reactance xc expresses in ohm.


17
On an aeroplane using ac as primary power supply batteries are charged in flight from A transformer rectifier unit. Capacitive reactance when frequency tends to zero current magnitude almost equal to zero at contrary when fequency high this the magnitude of voltage which tends to zero we are talking about capacitive reactance xc expresses in ohm.


18
Immediately after starting engine s with no other electrical services switched on an ammeter showing a high charge rate to battery Would be normal is only cause concern if high charge rate persists. If engine was started electrically using battery there would have been a significant drain on battery the ammeter shows a charge after start up to replenish energy just drained from battery.


19
Circuit breakers protecting circuits may be Used in ac dc circuits. If engine was started electrically using battery there would have been a significant drain on battery the ammeter shows a charge after start up to replenish energy just drained from battery.


20
The function of a csd in an ac generating system to Drive generator at a constant speed. If engine was started electrically using battery there would have been a significant drain on battery the ammeter shows a charge after start up to replenish energy just drained from battery.



Exclusive rights: Content under private and protected license, reproduction prohibited and prosecuted.

979 Free Training Exam