Final

Question 0

What methods are used for controlling ice on static ports?

Answer 0

Electrical

Question 1

What keeps the pneumatic boots deflated during flight?

Answer 1

Suction from the engine driven vacuum pump.

Question 2

What happens of the inflation of the deicer boot is cycled too late? Too early?

Answer 2

If it’s too late, the ice will be too thick to break off. If inflated too soon, the ice is still elastic enough to break free.

Question 3

What kind of protection does Type I fluid provide?

Answer 3

Short term anti ice protection.

Question 4

Describe Type I fluid.

Answer 4

Low viscosity, and considered unthickened, provides short term anti-ice protection, orange in color, sprayed on hot at high pressures.

Question 5

Describe Type II fluids.

Answer 5

Are pseudo plastic, fluid film will remain in place until the aircraft reaches approximately 100 knots, generally white in color.

Question 6

What are the effects of icing?

Answer 6

Decreased lift (up to 30%) 
Increased drag (up to 40%) 
Decreased prop efficiency (up to 20%)
Increased stall speed (up to 20%)
Increase in weight 
Jammed control surfaces 
Damage due to ice breaking loose

Question 7

What are the different types of icing detection?

Answer 7

Visual
Electronic
Optical
C/FIMS

Question 8

What is the purpose of anti ice?

Answer 8

To prevent ice from forming

Question 9

Which ice forms when small, super cooled water is disturbed and instantly freezes?

Answer 9

Rime ice

Question 10

What causes frost to form?

Answer 10

When the dew point is below the freezing point ?

Question 11

Which ice forms when large water droplets freeze slowly?

Answer 11

Clear ice

Question 12

What type of ice can form even in temperatures of to 80° in clear air?

Answer 12

Engine ice (carburetor ice)

Question 13

How are pneumatic boots attached to the leading edges of a wing?

Answer 13

Adhesive, special hardware

Question 14

What sources of operating air are commonly used to inflate pneumatic boots?

Answer 14

Air from vacuum pumps

Question 15

What system is designed to prevent ice formation?

Answer 15

Anti ice system

Question 16

What are three possible sources for hot air for a thermal anti ice system?

Answer 16

Bleed air, combustion heater, exhaust air

Question 17

How are pitot tubes typically heated?

Answer 17

Electrically

Question 18

What two methods are used to keep a prop ice free?

Answer 18

Chemical spray and electrically heated boots

Question 19

What two components conduct the electrical current from the airframe to the prop assembly?

Answer 19

Brushes and slip rings

Question 20

What means are used to prevent or control ice formation?

Answer 20

Heating surfaces with hot air
Heating by electrical elements
Breaking up ice formations
Chemical application

Question 21

Ice and rain protection systems used on aircraft keep ice from forming on what airplane components?

Answer 21

Wing leading edges
Horizontal and vertical stabilizer leading edges 
Engine cowl leading edges
Props
Prop spinners 
Air data probes 
Flight deck windows 
Water and waste system lines and drains 
antenna

Question 22

What systems are considered thermal?

Answer 22

Compressor bleed air
Combustion heater air
Exhaust