Air Speed Indicator

Question 1

What does the lowest red line indicate on an ASI?

Answer 1

VMCA

Question 2

What is the best climb speed colour on an ASI?

Answer 2

Blue.

Question 3

Whats error is experienced when the ASI under reads the TAS at altitude?

Answer 3

Density error.

Question 4

What does unreliable airspeed cause?

Answer 4

Buffeting.

Question 5

What errors can unreliable airspeed cause?

Answer 5

Clock - position - orbital - GPS (CPOG)

Question 6

In addition to PIMS, what other errors can ASI suffer from?

Answer 6

Compressibility and density.

Question 7

Concerning the pitot and static system, the position error varies with:

1 – Altimeter setting
2 – Mach number
3 – Angle of attack

The combination that regroups all of the correct statements is…

Answer 7

2,3

Question 8

What is the acronym for ASI pitot blocked whilst descending and what does it stand for?

Answer 8

Pitot blocked - UNDER READS - Descending - PUD

Question 9

What is the acronym for ASI pitot blocked whilst climbing and what does it stand for?

Answer 9

Pitot blocked - OVER READS - climbing - POC

Question 10

What is the acronym for ASI static blocked whilst descending and what does it stand for?

Answer 10

Static blocked - OVER READS - Descending - SOD

Question 11

What is the acronym for ASI static blocked whilst climbing and what does it stand for?

Answer 11

Static blocked - UNDER READS - Climbing - SUC

Question 12

What happens to ASI if there is a leak within the pitot line?

Answer 12

Reduce.

Question 13

Will the ASI over or under read if there is a leak within the high pressure hull?

Answer 13

Under reads

Question 14

Will the ASI under or over read if there is a leak in an unpressurised aircraft?

Answer 14

Under read.

Question 15

EAS is obtained from CAS by correcting for:

1 – position error
2 – compressibility
3 – instrument error
4 – density

The combination that regroups all of the correct statements is…

Answer 15

2