787 examen (2)

All the communication and navigation systems are noisy, so the problem could be: Electrical power is not voltage regulated. Some Static Dischargers are broken or missing. Electrical Power is not frecuency regulated.

How do the CIT (Captain Instrument Tie) and FIT (First Officer Instrument Tie) relays operate?. The CIT (Captain Instrument Tie) and FIT (First Officer Instrument Tie) relays are opened and closed through ELCUS. The CIT (Captain Instrument Tie) and FIT (First Officer Instrument Tie) relays are usually open relays and are energized to close. The CIT (Captain Instrument Tie) and FIT (First Officer Instrument Tie) relays are usually closed relays and are energized to open.

Wich unit of the comunication system, send and receive data from de comunication and navigation system to the CDN?. The TCP (Tunning Control Panel). The ACP (Audio Control Panel). The AGU (Audio Gateway Unit).

In case of the total failure of the CDN (Common Data Network), only one AGU, has a Backup conection with the Captain ACP (Audio Control Panel), for avoid lose all the comunication, wich One?. LH FWD AGU. RHAFT and LH AFT AGUs. ALL AGUs.

What are the functions of CSSC?. Holds the cabin configuration data base. Controls cabine area lightin. Make alert and chime tones.

What electrical power does the VFSG provide to the aircraft?. The VFSG provides 235V AC / 250 KVA / variable frequency. The VFSG provides 115V AC / 90 KVA / 400 Hz. The VFSG provides 235V AC / 225 KVA / variable frequency.

What is the function of the CGUs?. To provide excitation, control, and protection for the VFSGs and ASGs. Only to provide excitation and control for the VFSGs and ASG. Only to provide control and protection for the VFSG and ASG.

You can get access to the CABIN MAINTENANCE screens on the CAP and... Maintenance Laptop. EFB. MCDF.

How many types of RPDUs does the Boeing 787 have?. Only one type: Standard. Two types of RPDUs: Primary / Secondary. Two types of RPDUs: Gateway / Standard.

When the TOWING POWER switch is set to ON, the APU HBB supplies power to these components: Left and right wing position lights / Tail cone position lights. Electric Brake Power Supply Units (EBPSU) / Captain Audio Control Panel (ACP) / Flight deck dome lights. Electric Brake Power Supply Units (EBPSU) / SOC annunciator / TOWING POWER ON BAT light.

Which is the Central Control Unit in the cabin system?. ADB (Area Distribution Box). CZU (Cabin Zone Unit). CSSC (Cabin Service System Controller).

In the Light System, the light source for illumunation is: Incandescent bulbs. Solid state LEDs (Light Emitting Diodes). Fluorescent lamps.

what mode is the CBIC in the following condition? Aircraft is on ground and a door (passenger bay or EE) is open or when external power is available. In maintenance mode. In Limited mode. In ground mode.

The aft external power connection is used for these purposes: Aft external power goes to the aircraft electrical buses. Supply the Standby Power system on ground. Start the right engine with external power (if APU is not available), Operate a third hydraulic electric motor and Reduce loadshed when operating the packs on the ground for test purposes.

Which RPDU communicates directly with the CDN?. The Gateway. The primary. The secondary.

Battery system. Is there a difference in the Burst Disc Indicator (BDI) of the early B787s and the newer B787s?. There is no difference, both aircraft models activate only a visual indication (red pop out). There si a diferente, the BDI(initial B787) has only a visual indication (red pop out) and the E-BDI (newer B787) sends, in addition, an electrical signal to ElCAS. There is no difference, they both operate in the same way, they extend a red pop out and send an electrical signal to EICAS.

Makes alert and chime tones: Cabin Attendant panel (CAP). Cabin Attendant Handset. Speaker drive Module (SDM).

SELCAL. Where is located the SELCAL Decoder function?. In to the AGUs. In to the HF transceiver. In to the VHF Transceiver.

The BPCUs send the commands through the Power Panel Data Network (PPDN) to. ELCCs directly. ELCU-C cards. ELCU-P cards.

The B787 electrical power system has these buses: 235V AC / 115V AC / 28V DC and +/- 270V DC. 115V AC / 28V DC Only. 235V DC / 115V AC / 28V AC and 270V DC.

What are the CBIC control modes?. CBIC has three control modes: Limited, Full and Maintenance. CBIC has two control modes: Ground and Air. CBIC has two control modes: Ground and Air. CBIC has three control modes: Limited, Ground and Maintenance.

Landing, Runway and Taxi lights are: Halogen. LED. HID.

What conditions turn on the VSG GEN DRIVE light?. Low oil pressure and High oil temperature. High oil temperature and VFSG bearing failure. Low oil pressure and VFSG bearing failure.

SATCOM. How the high gain antenna (HGA) receives data to points from the satellite?. The high gain antenna (HGA) has the communication satellites position data base. This antenna has an omnidirectional pattern, no other control is necessary. The receiver transmitter (SRT), with airplane position data, sends the beam steering commands.

How long could the emergency light operate?. Up to 30 minutes. Up to 15 minutes. Up to 20 minutes.

HF. What is the HF antenna coupler function?. It reduces the transmission and reception noise. It matches (tunes) the impedance of the antenna to the impedance of the transceiver. It modifies the antenna lenght for better transmission and reception.

How could be activated the ELT system?. Every time the airplane senses air and both engines are OFF. Manually from ELT control panel or automatically from G switch. From G switch only.

DCMF. Where is the main computer of data communication management function (DCMF) located?. At the forward E&E compartment. The DCMF has no components. At the aft E&E compartment.

The Flight Interphone, is used to allow comunication betwen: Fligth crew only. Fligth crew and Cabin Crew. Fligth crew and ground crew.

Which units provide protection against voltage spikes that can occur during lightning strikes?. The BPCUs and GCUs. The Overvoltage Transient Protection Units (OVTPUs). The Lightning Protection Units (LPUs).

What are ELCUs (Electrical Load Control Units) and ELCCs (Electrical Load Control Contactors) used for?. To provide 235V AC power to airplane loads. To provide 28V DC power, up to 10 amps to aircraft loads. To provide 28V DC power, up to 50 amps to aircraft loads.

What sends the opening and closing signal to the ELCCs (Electrical Load Control Contactors)?. The ELCUs "P". The ELCUs "C". The SPDUs.

What operates the CIT (Captain Instrument Tie) relay?. The right BPCU is primary control for the CIT relay. The left BPCU is secondary control. The CIT controls itself. The left BPCU is primary control for the CIT relay. The right BPCU is secondary control.

OVPTU. If two voltage spike events occur in one minute or if three events occur in one flight. What happens?. The GCU trips the GCB to open. The GCB stays open for the rest of the flight. The GCU triggers the GCB to open for 200 milliseconds, then the GCB closes again. The GCU sends an overload signal to the BPCUs to activate the overload protection.

How are the Handsets directory codes determined. They are determined by program pin. They are determined by software loaded from the cabin services system controller (CSSC). They are determined by a switch selections behind the craddle.

The main function of Secondary Power Distribution Units (SPDUs) is: To supply 115V AC and 28V DC power to loads of 50 amps and more. To supply 115V AC and 28V DC power to loads of 50 amps or less. To supply 115V AC and 28V DC power to loads of 10 amps or less.

HF. The HF frequency has been selected, ptt is pressed once.How does the crew know that tunning has been completed by the antenna coupler?. By listening an audio tone of 1 KHz. during less than 15 seconds, the HF is ready to transmission. At the audio control panel, the HF MIC selected will illuminate the transmitter select switch. An EICAS "HF READY TO TX" advisory message appears.

What is the function of the backup ATU?. The backup ATU supplies only 115V AC power when either of the "L" or "R" ATUs fails. The backup ATU supplies only 115V AC power for Aft Galley. The backup ATU supplies only 115V AC power for center pitot probe heater.

Wich are the units, in the comunications system, to tunning the radio frecuencies?. CDU (Control Display Unit). TCP (Tunning Control Panel). ACP (Audio control panel).

Emergency lights come on if: SW ARMED (P5) and 28 Vdc power fails. SW ARMED (P5) and 235 Vac power fails. SW ARMED (P5) and 115 Vac power fails.