CH.2 C Flight Instruments

Question 1

Which instruments use static pressure?

Answer 1

airspeed indicator, altimeter, vertical speed indicator

airspeed indicator is the only instrument which uses pitot pressure

Question 2

What is standard pressure at sea level?

Answer 2

29.92 in Hg & 15ºC (59ºF)

Question 3

What is the standard lapse rate for each 1,000’ of altitude in temp and Hg (below 36,000’)?

Answer 3

the standard lapse rate is:

1.00 in Hg per 1,000’ and 2ºC per 1,000’

Question 4

What are V-speeds?

Answer 4

The color-coded upper and lower limits of the arcs corresponding to specific airspeed limitations on the airspeed indicator

Question 5

What is Va?

Answer 5

Maneuvering speed
The maximum speed at which you may apply FULL and ABRUPT control movement without causing structural damage

THIS CHANGES with aircraft weight

Question 6

When can an aircraft stall?

Answer 6

At any altitude with an indicated airspeed in a specific configuration remains the same for a stall

Question 7

What is pressure altitude?

Answer 7

The distance above the standard datum plane

Question 8

What is density altitude?

Answer 8

Density altitude is pressure altitude corrected for nonstandr temperature

Question 9

What is true altitude?

Answer 9

The actual height of an object above mean sea level (MSL)

Question 10

What is absolute altitude?

Answer 10

The actual height of the AC above the earth’s surface (AGL)

Question 11

What is indicated altitude

Answer 11

The altitude measured displayed on altimeter

Question 12

What happens when flying from HIGH pressure area to LOW pressure without resetting altimeter?

Answer 12

True altitude will be LOWER than indicated on altimeter

Question 13

What happens when flying from LOW pressure area to HIGH pressure without resetting altimeter?

Answer 13

True altitude will be HIGHER than indicated on altimeter

Question 14

What does 1in Hg change equal in feet?

Answer 14

1,000’

Question 15

If atmospheric temp is higher than standard what happens to true altitude?

Answer 15

True altitude will be higher than indicated when temps are hotter

Question 16

What happens to true altitude if temp is lower than standard?

Answer 16

True altitude will be lower than indicated when temps are colder

Question 17

TREND INFORMATION

Answer 17

The immediate indication of an increase/decrease in rate of climb/descent (VSI)

Question 18

RATE INFORMATION

Answer 18

stabilized rate of change (VSI)

Question 19

What instrument is affected by a blockage in the pitot tube? What is indicated?

Answer 19

airspeed indicator
climb = higher speed
decent = lower speed

Question 20

What instruments are affected by a blockage in the static system? What is indicated?

Answer 20

Airspeed indicator - inaccurate
Altimeter - frozen
VSI - 0

Question 21

Rigidity in Space

Answer 21

Principle that a wheel with a heavily weighted rim spun rapidly will remain in a fixed position in the plane in which it is spinning

Question 22

Precession

Answer 22

The tilting or turning of a gyro in a response to pressure

Question 23

Which instruments are gyroscopic instruments?

Answer 23

Attitude indicator, heading indicator and turn coordinator

Question 24

What instruments are powered by vacuum system?

Answer 24

Attitude and heading indicators

Question 25

What instrument is powered by an electrical system?

Answer 25

Turn coordinator

Question 26

What does the turn coordinator indicate?

Answer 26

The turn direction and quality as well as the backup source of bank information in the event of attitude indicator failure

Question 27

What does the attitude indicator show?

Answer 27

Depicts the position of AC in relation to true horizon (uses artificial horizon and miniature airplane)

Question 28

When should you realign heading indicator and why?

Answer 28

Due to precession, the heading indicator needs to be aligned with magnetic compass. Must be in straight and level and unaccelerated flight with magnetic compass showing a steady indication

Question 29

What happens if you accelerate in the northern hemisphere?

Answer 29

Magnetic compass will show a turn to the north

(ANDS) does not occur when flying directly N/S heading

Question 30

What happens if you decelerate in the northern hemisphere?

Answer 30

The magnetic compass indicates a turn to the south

(ANDS) does not occur when flying directly N/S heading

Question 31

What is turning error?

Answer 31

Causes the magnetic compass to lead or lad the actual magnetic heading of the airplane during turns

North heading turn to the left will initially indicate east heading
North heading turn to the right will initially indicate west heading

Question 32

Pitot pressure is used by which flight instrument(s)?

Answer 32

airspeed indicator

Question 33

What will the effect be on the airspeed indicator if the static system becomes clogged, but the pitot system remains unobstructed? why?

Answer 33

The altitude above the point where the static ports become clogged, the airspeed indicator will indicate slower than actual because the trapped static pressure is higher than normal for the altitude. At altitudes lower than the point where the static ports became clogged, the airspeed will indicate faster than actual since the trapped static pressure is lower than normal for that altitude

Question 34

What type of movement is depicted by the attitude indicator, but not the turn coordinator?

Answer 34

Pitch