Electrical

Question 1

Electrical Contractor Management Unit (ECMU) function is:

a. control of AC and DC bus ties

b. TR contractors monitoring

c. automatic management and monitoring

Answer 1

c. automatic management and monitoring

Question 2

Loss of one generator or TR:

a. results in the loss of the corresponding AC or DC bus

b. has no effect on flight management

c. requires to have the APU generator operational

Answer 2

b. has no effect on flight management

Question 3

The minimum number of generators required to supply all the network (in a non-overload condition) is

a. one engine generator

b. one engine generator and the EMER generator

c. two generators

Answer 3

a. one engine generator

Question 4

The emergency generator is powered by:

a. a Ram Air Turbine

b. the Static Inverter

c. the green hydraulic system when pressurized by engine 1 or 2 driven hydraulic pump or by Ram Air Turbine

Answer 4

c. the green hydraulic system when pressurized by engine 1 or 2 driven hydraulic pump or by Ram Air Turbine

Question 5

An engine generator is driven:

a. at a ratio of 5:1 to engine speed

b. direct from the accessory gear box

c. by an Integrated Drive Generator (IDG)

Answer 5

c. by an Integrated Drive Generator (IDG)

Question 6

Each engine generator supplies power to:

a. its assigned AC BUS in normal operation

b. the opposite side AC BUS in normal operation

c. only its assigned BUS in all cases

Answer 6

a. its assigned AC BUS in normal operation

Question 7

The APU battery:

a. is dedicated to APU start only

b. may be used for Engine Start when the APU is not available

c. can be used as a backup for Battery One or Battery Two

Answer 7

a. is dedicated to APU start only

Question 8

Normally which AC BUS supplies the ESS TR?

a. AC BUS 1

b. AC BUS 2

c. AC ESS BUS

Answer 8

a. AC BUS 1

Question 9

When the Battery selector is in the #2 position, which of the following is true?

a. BAT 2 has been selected to start the APU

b. BAT 2 voltage can now be read in the voltage indicator window

c. APU BAT voltage can now be read in the voltage indicator window

Answer 9

b. BAT 2 voltage can now be read in the voltage indicator window

Question 10

In flight, APU not running, an engine generator has failed, which source is supplying the the corresponding AC BUS?

a. the Static Inverter

b. the AC BUS is lost

c. the other side engine generator

Answer 10

c. the other side engine generator

Question 11

Two Electrical Contactor Management Unit (ECMU) provide:

a. control of TR contactors

b. AC and DC contactors control and monitoring except for TR contractors

c. AC and DC contactors control and monitoring except for TRs which have their own control, gallery shedding and no break power transfer

Answer 11

c. AC and DC contactors control and monitoring except for TRs which have their own control, gallery shedding and no break power transfer

Question 12

The ESS TR s normally supplied by which BUS?

a. AC ESS BUS

b. AC BUS 1

c. AC BUS 2

Answer 12

b. AC BUS 1

Question 13

When TR 1 is lost, due to unpowered AC BUS 1:

a. there is no degradation in the capability of the DC system

b. the APU BAT BUS is discharging at a rate of 2 amperes

c. the Static Inverter is being powered because TR 1 is not powered

Answer 13

a. there is no degradation in the capability of the DC system

Question 14

121. When the C/B ECAM page shows NORMAL in green, it indicates:

a. there are no C/Bs tripped or pulled

b. electric supply to C/Bs is normal

c. no fault detected in the Electronic Equipment Bay

Answer 14

a. there are no C/Bs tripped or pulled

Question 15

122. The last C/B tripped is displayed (ECAM C/B page):

a. on top of the tripped C/B list

b. on the last tripped C/B list

c. not shown

Answer 15

a. on top of the tripped C/B list

Question 16

123. When the C/B ECAM page shows NOT AVAIL in amber, it indicates:

a. the C/B ECAM page is not selectable

b. requested C/Bs are not monitored by the CBMU

c. data from the CBMU are not monitored by the CBMU

Answer 16

c. data from the CBMU are not monitored by the CBMU

Question 17

124. During EMER GEN automatic start up sequence:

a. the MAN ON pb must be pushed to extinguish red FAULT light on the EMER ELEC CTRL PANEL

b. it is not recommended to push the MAN ON pb to confirm EMER ELEC config on the EMER ELEC PANEL

c. the RED FAULT light on EMER ELEC PANEL will remain ON until the EMER GEN reaches its nominal output

Answer 17

c. the RED FAULT light on EMER ELEC PANEL will remain ON until the EMER GEN reaches its nominal output

Question 18

125. The EMER GEN is being powered by a hydraulic system pressurized by an engine driven hydraulic pump. Pressing the LAND RECOVERY push button switch will:

a. operate when the gear is extended

b. normally recover the AC and DC LAND RECOVERY BUSES and the DC SHED LAND RECOVERY BUS. This will power some components for approach and landing

c. energize the landing gear

Answer 18

b. normally recover the AC and DC LAND RECOVERY BUSES and the DC SHED LAND RECOVERY BUS. This will power some components for approach and landing

Question 19

126. The main function of the MAINT BUS SWITCH is:

a. to power the AC and DC systems when the aircraft is on the ground

b. to allow selected ground services equipment to be powered without powering the entire aircraft electrical system.

c. to allow EXT power to supply AC and DC essential busses and their respective shed buses

Answer 19

b. to allow selected ground services equipment to be powered without powering the entire aircraft electrical system.

Question 20

127. When the MAINT BUS SWITCH is ON:

a. the electric network supply is limited to Ground Service items

b. the DC busses are powered only

c. it is for the purpose of operating the cargo door only

Answer 20

a. the electric network supply is limited to Ground Service items

Question 21

128. The MAINT BUS SWITCH is located:

a. on the overhead systems panel in the cockpit

b. overhead, before entry of the cockpit door

c. on the Purser’s Control Panel in the FWD cabin

Answer 21

b. overhead, before entry of the cockpit door

Question 22

When ECAM shows ELEC ECMU 1 FAULT amber message (ECMU = Electrical Contractor Management Unit):

a. ECMU 1 controls Generator Line Contractor (GLC) 2; you should reset generator 2

b. ECMU 1 controls GLC 1 and you should not reset the corresponding generator

c. ECMU 1 controls GLC 1 and you should try to reset the corresponding generator

Answer 22

b. ECMU 1 controls GLC 1 and you should not reset the corresponding generator

Question 23

130. A MASTER CAUTION light with a single chime and the following ECAM memo ELEC GEN 2 FAULT illuminate amber, this means that:

a. an ECMU fault

b. a TR overload

c. a generator fault

Answer 23

c. a generator fault

Question 24

131. The FAULT light of the GALLEY pb switch will illuminate amber when:

a. galley circuits are shed

b. an overload is detected and the automatic shedding is not operating

c. the automatic shedding, manual override and overload detection are not operating

Answer 24

b. an overload is detected and the automatic shedding is not operating

Question 25

ECAM message ELEC BAT 1 FAULT is shown on the ECAM. The fault was triggered because:

a. charging current increasing at an abnormal rate

b. abnormal voltage

c. the BAT 1 pb is set to OFF

Answer 25

a. charging current increasing at an abnormal rate

Question 26

ECAM message ELEC DC BUS 2 FAULT means:

a. a faulty TR

b. the normal connection between DC BAT BUS and DC BUS 2 has been broken

c. DC BUS 2 is not powered

Answer 26

c. DC BUS 2 is not powered

Question 27

The IDG switch on the ELEC control panel is used:

a. to disconnect the generator

b. to disconnect the generator and open the GCU

c. to disconnect the IDG from the accessory gear box

Answer 27

c. to disconnect the IDG from the accessory gear box