Ice/Rain/Waste Systems

Question 1

What must all aircraft that operate in weather conditions where ice is likely to form be provided with?

Answer 1

Ice protection

Question 2

Ice increases _______ and reduces _______

Answer 2

Increases drag
Reduces lift

Question 3

Ice hampers instrument readings and causes what?

Answer 3

Vibration

Question 4

What does an anti-icing system do?

Answer 4

Prevents the formation of ice

Question 5

What does a deicing system do?

Answer 5

Removes ice on the aircraft

Question 6

What are the deicer boots coated with to dissipate static?

Answer 6

Neoprene

Question 7

What are on the back side of the deicer boots?

Answer 7

Air connections

Question 8

How are deicer boots driven?

Answer 8

Pneumatically

Question 9

What controls the inflation sequence for the deicer boots by directing the vacuum?

Answer 9

The Distributor valve

Question 10

How is airflow disruption minimized when inflating deicer boots?

Answer 10

Boots are inflated alternately

Question 11

What holds the boots deflated when the system is off, by regulating the vacuum?

Answer 11

A suction relief valve

Question 12

What is the purpose of the oil separator in a wet type vacuum pump?

Answer 12

To protect the boots from oil deterioration by removing the oil from the air

Question 13

How do you remove any grease or oil from a deicer boot?

Answer 13

With Naptha or Soap & Water

Question 14

Where would you find deicer boot removal procedures?

Answer 14

The Maintenance Manual

Question 15

How does the Wing Anti-Ice (WAI) System work?

Answer 15

Uses heated air flowing through passages in the wing, or electric resistance heat elements in a “blanket”

Question 16

The WAI system is an Anti-ice system. TRUE or FALSE?

Answer 16

TRUE

Question 17

What are the heat sources for thermal anti-icing pneumatic systems?

Answer 17

Combustion heaters, Bleed air, or Augmenter tubes

Question 18

What components are heated with a Thermal Electric Boot System?

Answer 18

Wing leading edges, or leading-edge slats, horizontal/vertical stabilizer leading edges, and some turbine and turboprop inlets

Question 19

How are many propellers deiced?

Answer 19

By an electrically heated boot on each blade

Question 20

With the boot firmly cemented in place, it receives current from what?

Answer 20

A slip ring and brush assembly on the spinner bulkhead

Question 21

How is the 10 PSI variable output for propeller fluid anti-icing controlled?

Answer 21

By a Rheostat

Question 22

What are the flow rate ranges for propeller fluid anti-icing?

Answer 22

Less than 1 quart to more than 1 gallon per hour

Question 23

How is anti-icing fluid ejected from the slinger ring?

Answer 23

Centrifugal Force

Question 24

How are the heaters controlled for probe anti-icing?

Answer 24

Switches

Question 25

How can proper operation of the pitot/static tube heat be verified?

Answer 25

With an Ammeter

Question 26

Carburetor icing is most severe at temperatures between ___-___degrees F.

Answer 26

30 - 40

Question 27

Carburetor icing can occur in warm weather with no visible moisture. TRUE or FALSE?

Answer 27

TRUE

Question 28

What are 3 methods of windshield ice control?

Answer 28

-**Electric** heating element in windshield -Circulating heated **air** -Spraying **fluid** on the windshield

Question 29

Where are the heated sensors located for the windshield heating?

Answer 29

Imbedded in the glass

Question 30

What are 3 things to check for when inspecting the windshield heating?

Answer 30

Delamanation Scratching Arcing

Question 31

When is spraying the windshield normally used?

Answer 31

To clear the windshield prior to landing

Question 32

What are 3 ways that windshield wiper systems are operated?

Answer 32

Electrically Hydraulically Pneumatically

Question 33

How does the pneumatic rain removal system work?

Answer 33

Uses high velocity compressor bleed air to prevent rain from hitting the windshield

Question 34

What 2 fluids are used to remove frost?

Answer 34

Ethylene Glycol & Isopropyl Alcohol

Question 35

How is ice removed from turbine engines?

Answer 35

Hot air

Question 36

How can an operational check of the deicing system be made?

Answer 36

By operating the aircraft systems per operational instruction

Question 37

Deicing fluid is NONflammable. TRUE or FALSE?

Answer 37

FALSE

Question 38

What is used to clean and dry heated windshields?

Answer 38

Clean with Mild Soap & Water Dry with Chamois or Absorbent Cotton

Question 39

How are lavatory holding tanks drained?

Answer 39

Through a valve that can only be opened by ground personnel

Question 40

Water pipes, where icing conditions are likely to occur, are insulated and heated with what?

Answer 40

Electrical tape heaters

Question 41

What controls the amount of current to the heating elements in a windshield?

Answer 41

Thermistors

Question 42

What causes arching in electrically heated windshields?

Answer 42

A breakdown of the conductive coating

Question 43

What are the two types of ice formations?

Answer 43

Rime & Clear/Glaze