Instruments

Question 1

Total pressure source is

Answer 1

The pitot tube

Question 2

The 3 basic pressure insturments are _____ and use what source

Answer 2

-Airspeed indicator
( pitot pressure and static)

-Altimeter
Vertical speed indicator
(static only)

Question 3

Position Error

Answer 3

Caused by disruption in the airflow over the pressure system source

Question 4

Indicated airspeed is a measure of

Answer 4

Dynamic pressure

Question 5

To get TAS from IAS you correct with

Answer 5

Density error

Postion error

Compressibility error

Question 6

As aircraft climb altimeter aneroid capsule will

Answer 6

Expand due to the static pressure outside is reducing

Question 7

QNE is

Answer 7

Pressure altitude

Question 8

Before flying IFR the altimeter should read

Answer 8

+30 and - 40 on the correct altitude when the aircraft is on the ground.

Question 9

Inside the VSI

Answer 9

Static pressure flows into the capsule then is leaked into the case

If there is more pressure inside the capsule then out, the VSI will show a descent.

Question 10

Using alternate static will cause altimeter

Answer 10

to be slightly high because the pressure inside the cabin is lower.

Question 11

If the static source is blocked VSI will

Answer 11

A slight under read

Question 12

Rigidity is a gyro desire to

Answer 12

Remain in a fixed alignment in space unless acted upon by an external force.

Question 13

A rate gyro

Answer 13

Has freedom of movement in two planes

Movement in the third is used to measure precession.

Question 14

An Earth gyro is free to move in

Answer 14

3 planes but is controlled by gravity to maintain it’s positon relative to Earth.

Question 15

A pneumatic gyro

Answer 15

Uses a high speed jet of air to spin the gyro.

Question 16

Advantages of electrically driven gyro

Answer 16

-Cleaner and less maintenance

-Spin at a higher and more precise RPM

-increased resistance to toppling

Question 17

Gyro inside TI and TC

Answer 17

-Spins away from pilot

-In a right turn, the top of the gyro will tip left.

Question 18

The co-ordination ball on a TI/TC is

Answer 18

Independent from any power source.

Question 19

HI/DI uses what kind of gyro

Answer 19

Tied Gyro

Question 20

HI/DI has it’s spin axis

Answer 20

Vertically |||||||

Question 21

The gyro in the Altitude heading is mounted inside 2 gimbal rings

Answer 21

-Inner gimbal allows for pitching

-Outer gimbal allows for rolling

Question 22

The pendulous unit

Answer 22

Keeps the gyro axis aligned with the true vertical

Question 23

Acceleration error during takeoff will show

Answer 23

Climbing turn to the right

Question 24

An electrically driven Altitude indicator

Answer 24

-Uses mercury switches

-Connected to torque motors to maintain true vertical

Question 25

Limits for pneumatically driven AI are

Answer 25

-55 degrees pitch -90 degrees roll

Question 26

Limits for electrically driven AI

Answer 26

-85 degree pitch -No limit in roll

Question 27

Flux valve in a RMI

Answer 27

is fixed in azimuth but pendulously suspended in damping fluid to allow it to remain horizontal.

Question 28

DGU stands for

Answer 28

Directional gyro unit

Question 29

Slaving rate of DGU to the flux valve is aprox

Answer 29

1-2 degrees per minute

Question 30

Aparanet wonder is

Answer 30

-prominent at poles -aprox 11 degrees per hour at nz 15 degrees x sin lat/hour -compensated using drift nut or latitude rider.

Question 31

Gyro inside TC and TI has its axis

Answer 31

lateral

Question 32

Signs that ASI pitot has been frozen

Answer 32

airspeed will fluctuate then drop to a very small value pitot pressure leaks out the drain hole

Question 33

Purpose of a pendulous unit on a Artificial horizon is

Answer 33

To keep the gyro spin axis aligned with the true vertical

Question 34

what effect of decrease in temperature while aircraft is flying level at FL 190

Answer 34

TAS decrease EAS increase