Introduction and Pressure Sensing - Ch 1 + 2

Question 1

Basic 6 Instruments

Answer 1

ASI
Artificial Horizon
VSI
Turn and Slip
Compass (Directional Gyro)
Altimeter

Question 2

Pressure Instruments

Answer 2

ASI
Altimeter
VSI

Question 3

Electro - Mechanical Instruments

Answer 3

Turn and Slip
Attitude
Compass

Question 4

Analogue Display

Answer 4

Pointers move relative to a scale

Quick and easy to read
Quick and easy to detect trends
Abnormal Indication easy to spot

Question 5

Digital Display

Answer 5

Display information in numerical form

Good to display precise info
Not so easy to detect trends and changes
Rapidly changing numbers/info can be hard to read

Question 6

Comparative

Answer 6

Rotating Pointer - Easy to see RoC

Question 7

Quantitative

Answer 7

Digital read out

Easy to see precise values

Question 8

Colour Meanings

Answer 8

Red = Warning 
Yellow = Caution
Green = Normal

Question 9

MFDU

Answer 9

Multi functioning DU

Question 10

EICAS

Answer 10

Boeing

Engine indicating and crew alert system

Question 11

ECAM

Answer 11

Airbus

Electronic Centralised AC Monitoring

Question 12

LRU

Answer 12

Line Replacement Units - could be anything 
Replaceable (burn out sometimes)
Fwd under the flight deck 
Cooled
Re-Rack(able)
Heavy
Location

Question 13

Pressure Sensing Instruments

Answer 13

Altimeter
VSI
ASI
Mach

Question 14

Gauge Pressure

Answer 14

Differential pressure relative to ambient air

Question 15

Psi used in

Answer 15

Eng. Oil Pressure
Hydraulic System pressures
Cabin differential pressures

Question 16

Static Pressure

Answer 16

Non-Linear decay with altitude

Question 17

MEMS Technology

Answer 17

Micro-Electro-Mechanical Systems

• Compact
• Easy to diagnose
  Collects info (pressure)

Question 18

Aneroid Capsule

Answer 18

Low px

Altimeter

Slight vacuum, supported by a spring
Single/layered

Question 19

Bellows

Answer 19

Low px

ASI

Multi-layered open to a pressure (not sealed)

Question 20

Diaphragm

Answer 20

Low px

Delicate membrane used in artificial feel systems

Question 21

Bourdon Tube

Answer 21

High Px

Party blower, distorts (unwinds) under px.

In the induction inlet manifold - MAP Gauge

Question 22

Hysteresis

Answer 22

A behind reaction to the reading caused by the metals’ resistance to movement

Question 23

Pitot Pressure

Answer 23

Measured from a pitot tube aligned to airflow (perpendicular)

Combined head measures q + p - drains water to prevent icing. Airflow can be disturbed disturbed and therefore not accurate

Question 24

Errors

Answer 24

Instruments
Manoeuvre
Position

Temp
Barometric
Time lag

Question 25

Walk Around

Answer 25

Looking for abnormalities - remove before flights