Air Mgmt. System

Question 1

At what N1 engine rpm do the bypass doors of the PSS automatically close?
A. 51% decreasing
B. 51% increasing
C. 61% decreasing
D. 7 1% increasing

Answer 1

A. 51% decreasing

Question 2

When a PART SEP switch is placed in the OVRD ON position, what happens to the PSS bypass door?
A. It closes regardless of engine N1 rpm.
B. It opens regardless of engine N1 rpm.
C. It closes regardless of the FIRE PULL handle position.
D. It opens regardless of the FIRE PULL handle position.

Answer 2

B. It opens regardless of engine N1 rpm.

Question 3

When a FIRE PULL handle is actuated, what is the effect on the bypass door?
A. It opens regardless of engine N1 rpm.
B. It opens regardless of PART SEP switch position.
C. It closes regardless of PART SEP switch position or engine N1 rpm.
D. It remains in the last energized position.

Answer 3

D. It remains in the last energized position.

Question 4

When does the PART SEP OFF caution light illuminate?
A. When the PART SEP switch is placed in the OVRD ON position
B. When engine N1 rpm drops below approximately 61%
C. When the bypass door opens
D. When the bypass door closes

Answer 4

C. When the bypass door opens

Question 5

What does the effect of a loss of DC electrical power to the PSS have on the PART SEP OFF caution light?
A. It is inoperative.
B. It illuminates only if the FIRE PULL handle is actuated.
C. It illuminates regardless of door position, engine N1 rpm, or FIRE PULL handle position.
D. It illuminates because the door closes automatically in the event of DC power failure.

Answer 5

B. It illuminates only if the FIRE PULL handle is actuated.

Question 6

Particle separation is achieved by what?
A. A swirl cage blower
B. An inertial bypass
C. A filter bypass
D. An indirect air inlet

Answer 6

C. A filter bypass

Question 7

If the PART SEP OFF caution light remains illuminated after engine start, what action should the pilot take?
A. Pull the respective PART SEP circuit breaker on the overhead console.
B. Abort the engine start since the bypass door is jammed closed.
C. Move the respective PART SEP switch to the OVRD ON position.
D. Ignore the indication since the bypass door is opened by ram air in forward flight.

Answer 7

D. Ignore the indication since the bypass door is opened by ram air in forward flight.

Question 8

Engine inlet air anti-icing is a function of what?
A. Heated engine inlet guide vanes
B. PG air line heaters
C. Bleed-air heating of the engine air inlet frame
D. The PSS, which separates water droplets from engine inlet air

Answer 8

C. Bleed-air heating of the engine air inlet frame