Week 3: Pitot Static Instruments

Question 1

If you apply soapy water to a static port when the Altimeter is reading ASL, what happens?

Answer 1

It sucks in the water (destroys ALT)

Question 2

What type of pressure goes into the altimeter and VSI?

Answer 2

Negative pressure

Question 3

Should your altimeter be reading BSL or ASL before applying soapy water to it?

Answer 3

Below Sea Level

Question 4

True or False, your static source is a vacuum?

Answer 4

True

Question 5

What does the static port introduce?

Answer 5

Outside air at its normal atmospheric pressure (not moving)

Question 6

The static port applies air to which instruments?

Answer 6

ASI, VSI, ALT

Question 7

What is pitot pressure?

Answer 7

Generated by the fwd motion of the aircraft thru air

Question 8

Pitot pressure is also know as what?

Answer 8

Impact, ram, total pressure

Question 9

Which instrument uses pitot pressure?

Answer 9

ASI, Mach meter

Question 10

Pitot tubes have what to keep them from icing?

Answer 10

Anti-icing

Question 11

During leak checks what should you check?

Answer 11

Connections and junctions

Question 12

Advanced pitot static systems have how many pitot tubes and static ports?

Answer 12

3 pitot, 6 static

Question 13

What are the 2 modules in a Mach meter?

Answer 13

Airspeed and Altitude module

Question 14

The mach meter/speed of sound depends on what?

Answer 14

Your altitude

Question 15

What is the only instrument that normally points at 9oclock?

Answer 15

VSI

Question 16

When is attenuated speed most important?

Answer 16

When landing

Question 17

The ASI measures what?

Answer 17

Pitot and Static, differential pressure, speed of aircraft thru the air

Question 18

What is indicated airspeed?

Answer 18

read directly from instrument

Question 19

This type of airspeed is relative of the airmass you are moving through and compensates for pressure and temperature

Answer 19

True Airspeed

Question 20

What is ground speed?

Answer 20

Speed of aircraft relative to the ground

Question 21

When are ground speed and true airspeed the same?

Answer 21

no wind

Question 22

If you set your altimeter to your current barometric pressure for that day, what should the ALT be reading?

Answer 22

0

Question 23

How do you force your altimeter to read 0?

Answer 23

Decouple the baroset knob using the screw and then turn it to 0 then recouple it

Question 24

The ALT is connected to what?

Answer 24

Static port

Question 25

The ALT indicates what?

Answer 25

Height above sea level MSL/ASL

Question 26

If the aircraft is flying below 18000ft what should the ALT be set to?

Answer 26

Local barometric pressure (Indicated Alt)

Question 27

If the aircraft is flying above FL180 what will the ALT baro be set to?

Answer 27

29.92inHg

Question 28

Indicated alt and pressure alt can be the same when?

Answer 28

On a standard day

Question 29

What are the 5 types of Altimeters?

Answer 29

Sensitive, Encoding, Counter Drum, Servo, RadALT

Question 30

What does the encoding altimeter encode the alt info for?

Answer 30

Txpr and ATC

Question 31

The counter drum pointer range is what?

Answer 31

0-999

Question 32

A servo alt has what?

Answer 32

A servo

Question 33

How does the RAD ALT work and what does it measure?

Answer 33

Sends signal to ground and back then measures the time difference

Question 34

When is the RAD ALT used and what is its range??

Answer 34

During approach and a range of FL25

Question 35

How often do Altimeters require testing?

Answer 35

Every 24 months

Question 36

In the ASI the case is vented to what? The diaphragm is vented to what?

Answer 36

Case vented to static port | Diaphragm to pitot port

Question 37

The white arc on the ASI means what?

Answer 37

Flap operating range

Question 38

The blue on the ASI is set by who?

Answer 38

Manufacturer

Question 39

What does the mach meter show?

Answer 39

ratio of true airspeed to local speed of sound

Question 40

As altitude increases what happens to the speed of sound?

Answer 40

Decreases

Question 41

At what altitude does the speed of sound stop decreasing?

Answer 41

36000ft

Question 42

Mach speed depends on what?

Answer 42

Altitude and temperature

Question 43

How do you zero out a VSI that is not reading zero when on the ground?

Answer 43

Zeroing screw on bottom left side of instrument to adjust

Question 44

What does the VSI indicate?

Answer 44

RATE of change of altitude in ft/min

Question 45

The calibrated leak acts as a what?

Answer 45

A restrictor valve that prevents the case from getting instant pressure

Question 46

In the VSI what gets the instant static pressure?

Answer 46

The diaphragm

Question 47

If capsule has decreased pressure and case has higher pressure what does this mean?

Answer 47

Aircraft is climbing

Question 48

Explain what happens in the VSI when the aircraft is descending

Answer 48

Capsule has higher pressure compared to case which has lower pressure

Question 49

What does the IVSI have that makes it instant?

Answer 49

Accelerometers

Question 50

The in class barfield tester does not have a what?

Answer 50

VSI