keith williams
16th Oct 2011, 08:28
Aircraft with pressurized cabin in flight:
When switching to the alternate static pressure source, the pointer of the Vertical Speed Indicator:
A) indicates a climb, then settles down and reads incorrectly
B) indicates a descent, then settles down and reads incorrectly
C) indicates a slight continuous descent
D) indicates correctly
shouldnt this indicate a decent....high pressure inside cockpit so goes to static source indicates decent and then settles downs and indicates incorrectly...but the ans is listed as A
Two points here.
Point 1. The alternate static source will not be inside the cabin of a PRESSURISED aircraft, but it probably will be inside the cabin of an UNPRESSURISED aircraft.
Point 2. It looks like the person who copied this question into your on-line question bank made a typing error. It should read UNPRESSURISED and not PRESSURISED.
Assuming that the alternate static source is somewhere in the unpressurised structure such as in a wheel well, option A is the best answer. But if it really is in the pressurised cabin then option B is best.
When switching to the alternate static pressure source, the pointer of the Vertical Speed Indicator:
A) indicates a climb, then settles down and reads incorrectly
B) indicates a descent, then settles down and reads incorrectly
C) indicates a slight continuous descent
D) indicates correctly
shouldnt this indicate a decent....high pressure inside cockpit so goes to static source indicates decent and then settles downs and indicates incorrectly...but the ans is listed as A
Two points here.
Point 1. The alternate static source will not be inside the cabin of a PRESSURISED aircraft, but it probably will be inside the cabin of an UNPRESSURISED aircraft.
Point 2. It looks like the person who copied this question into your on-line question bank made a typing error. It should read UNPRESSURISED and not PRESSURISED.
Assuming that the alternate static source is somewhere in the unpressurised structure such as in a wheel well, option A is the best answer. But if it really is in the pressurised cabin then option B is best.