ATA 36 Flashcards
(25 cards)
Which unit controls the operation of engine pneumatic system
a ASCPC
b CTC
c ECSMC
A
ASCPC can operate in how many modes
a One mode: digital
b Two modes: digital and analog
c Three modes: digital, analog and back up
C
How many high pressure ground connection are installed on B777
a 2 connections
b 3 connections
c 4 connections
B
The ground air symbol on air synoptic page is
a Always show on air synoptic page
b Shown when ground air cart is connected
c Shown when ground air cart is connected and user system is on
C
Where are located the manifold pressure sensors
a In the wings under fixed leading edge
b Forward of ECS bay near primary jacks positions
c On engine struts
B
On air synoptic page, the white circle with flow bar 90 degree to duct is used to indicate
a Valve opened
b Valve closed
c Valve failed
B
On air synoptic page, how the valve position invalid is indicated
a Amber valve closed symbol with amber X
b White circle with flow bar in line with duct
c White circle with no flow bar
C
How can you know which ASCPC is control cabin pressurization system
a See maintenance page
b See air synoptic page
c See status page
A
The unit of duct pressure shown in air synoptic page is
a psid
b psig
c Milibar
B
Which of the following is correct? (B1)
a. HPSOV and PRSOV are the same
b. HPSOV is controlled and operates by electrical power
c. You can lock HPSOV in open position
A
Which of the following regulates control pressure to FAMV (B1)
a. PRSOVC
b. HPFAC
c. Manifold flow sensor
B
‘CLOSED’ light on Isolation Valve Switches illuminates (B1)
a. Any time Isolation Valve in Close position
b. When Isolation valve closed due to non-normal condition of the valve or pneumatic system
c. Only when Isolation Valve Switch is selected to OFF
B
When both engine are running and supply air to pneumatic system, Center Isolation position is normally (B1)
a. Open
b. Modulated
c. Closed
C
Which sensor is used by ASCPC to supply duct pressure to EICAS (B1)
a. Manifold flow sensor
b. Manifold pressure sensor
c. Intermediate pressure sensor
B
Pneumatic system of B777 has following modes of operation (B1)
a. Primary, Analog (backup) and Pneumatic modes
b. Primary and Backup modes
c. Pneumatic and Backup modes
A
In Pneumatic mode of operation, engine air supply system is controlled by (B1)
a. ASCPC
b. CTC
c. Reference pressure regulator inside HPFAC and PRSOVC
C
In Backup mode, FAMV is (B1)
a. Fully closed
b. Modulated
c. Fully open
C
When pneumatic system operates in Pneumatic mode, to turn off air bleed we should (B1)
a. Pull ASCPC circuit breaker
b. Select engine bleed switch to OFF
c. Shut down engine
C
Controlled air from engine compressor to HPFAC and PRSOVC are cooled by (B1)
a. Fuel
b. Fan air
c. Ambient air
B
Purpose of Duct Vent Valve is to (B1)
a. Bleed air from pneumatic system
b. Bleed air from FAMV
c. Bleed air to prevent overpressure condition caused by HPSOV leakage when HPSOV and PRSOV are both commanded to close
C
Without electrical power, isolation valves are (B1)
a. Spring-loaded closed
b. Spring-loaded open
c. Latched in previous position when electrical power was available
A
All isolation valves are interchangeable and interchangeable with (B1)
a. PRSOV
b. HPSOV
c. APU shutoff valve
C
Where can you find the accurate position information of HPSOV and PRSOV? (B1)
a. Air Supply Maintenance page
b. Air synoptic page
c. Position indicator on the valve
C
Intermediate Pressure Check Valve installation is prevented by (B1)
a. Flow direction arrow on the valve
b. Direction arrow and male-female flanges
c. Male and female flanges
B
