14 - Pneumatics

Question 1

1. (DSC-36-10) With engines and Apu running and Apu bleed valve selected on, select the correct statement :
   (a) Engine bleed valves open, X bleed valve opens, Apu bleed valve closes.
   (b) Engine bleed valves close, X bleed valve opens, Apu bleed valve opens.
   (c) Engine bleed valves open, X bleed valve closes, Apu bleed valve opens.
   (d) Engine bleed valves close, X bleed valve closes, Apu bleed valve opens.

Answer 1

(b) Engine bleed valves close, X bleed valve opens, Apu bleed valve opens.

Question 2

2. (PRO-SUP-70) To start an engine with external pneumatic power, the following switching is required
   (a) Engine bleeds off and Pneumatic X bleed to auto
   (b) Engine and APU bleeds off, Pneumatic X bleed open
   (c) Engine bleed switches off.
   (d) Apu bleed switch off.

Answer 2

(b) Engine and APU bleeds off, Pneumatic X bleed open

Question 3

3. (DSC-36-10) Air bleed from the engines is:
   (a) Not cooled prior to being used by the systems.
   (b) Cooled in a heat exchanger by cooling air bleed from the fan section.
   (c) Cooled using ambient air.
   (d) Only cooled in the air-conditioning part.

Answer 3

(b) Cooled in a heat exchanger by cooling air bleed from the fan section.

Question 4

4. (DSC-36-10) High pressure air is supplied from:
   (a) Engine 1 and 2 bleed systems, Apu load compressor, and HP ground connection.
   (b) Engine 1 and 2 bleed systems.
   (c) Engine 1 and 2 bleed systems and Apu load compressor.
   (d) Engine 1 and 2 bleed systems and the Ram Air Turbine.

Answer 4

(a) Engine 1 and 2 bleed systems, Apu load compressor, and HP ground connection.

Question 5

5. (DSC-36-10) Pneumatic system operation is controlled and monitored by :
   (a) One bleed monitoring computer.
   (b) Two bleed valve computers.
   (c) Two bleed monitoring computers.
   (d) Three bleed valve computers.

Answer 5

(c) Two bleed monitoring computers.

Question 6

6. (DSC-36-10) Which source operates the bleed valve :
   (a) Pneumatic.
   (b) Electric.
   (c) Both.
   (d) Hydraulic.

Answer 6

(a) Pneumatic.

Question 7

7. (DSC-36-10) What happens when pressure and temperature are not sufficient to supply the corresponding engine bleed valve;
   (a) I P valve closed.
   (b) H P valve opened, I F stage closed.
   (c) H P valve opened, I P stage remains in the same configuration.
   (d) X bleed valve open, if switch in auto position.

Answer 7

(c) H P valve opened, I P stage remains in the same configuration.

Question 8

8. (DSC-36-20) Can you control the H P valve position through the air bleed cockpit panel;
   (a) Yes.
   (b) No.
   (c) Yes, directly by turning up the pack temperature.
   (d) Yes, directly by turning down the pack temperature.

Answer 8

(b) No.

Question 9

9. (DSC-36-20) If the bleed valve closes, the HP valve :
   (a) Opens automatically.
   (b) Closes automatically.
   (c) Must be manually closed by putting the pack off.
   (d) Fails open.

Answer 9

(b) Closes automatically.

Question 10

10. (DSC-36-10) Temperature regulation is achieved by the precooler which regulates and limits the temperature at:
    (a) 150 deg.c.
    (b) 85 deg.c.
    (c) 200 deg.c.
    (d) 950 deg.c.

Answer 10

(c) 200 deg.c.

Question 11

11. (DSC-36-10) Which source controls the X bleed valve :
    (a) Pneumatic.
    (b) Electric.
    (c) Hydraulic.
    (d) PTU on/off switch.

Answer 11

(b) Electric.

Question 12

12. (DSC-36-10) Crossbleed valve is provided with two electric motors :
    (a) One for the automatic mode, the other for the manual mode.
    (b) Two for the automatic mode.
    (c) Two for the manual mode.
    (d) One for on ground operation, the other for in flight operation.

Answer 12

(a) One for the automatic mode, the other for the manual mode.