Aircraft Ice Formation and Carburettor Ice Quiz

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What is the purpose of an anti-ice system?

To prevent the formation of ice (correct)

To inflate the boots on leading edges

To remove ice after it forms

To create a smooth surface for the aircraft

How are de-icer boots typically constructed?

By direct connection to the engine

With single air passages

Using electrical wiring

With multiple separate air passages or chambers (correct)

What is the function of the air control valve in de-icing systems?

To increase engine power

To inflate the boots continuously

To pump high-pressure air into the tubes

To apply low pressure or vacuum to the tubes (correct)

How is vacuum pressure maintained in de-icing systems when not in use?

By applying low pressure or vacuum to the tubes Signup and view all the answers

How long are the tubes typically inflated with high-pressure air in de-icing systems?

6 seconds Signup and view all the answers

What is the role of engine-driven pumps in de-icing systems?

To supply high-pressure air to the tubes Signup and view all the answers

What is the main danger of ice forming on the wings and stabiliser of an aircraft?

Increasing the aircraft weight and disturbing the smooth aerofoil shape, reducing lift Signup and view all the answers

How does ice formation on a propeller affect its efficiency?

Lowering the efficiency of the propeller Signup and view all the answers

What can ice formation on jet engine air intakes cause?

Loss of power or overheating Signup and view all the answers

How can ice breaking off from a jet engine intake affect the aircraft?

Cause compressor blade damage Signup and view all the answers

What is the consequence of ice formation on masts and probes such as pitot tubes and antennas?

Causing system failure and increasing drag Signup and view all the answers

Why is ice forming on windshields dangerous for an aircraft?

Obscuring vision Signup and view all the answers

What is the purpose of inflating de-ice boots on an aircraft?

To break the ice by protruding out Signup and view all the answers

How long do the de-icer boots deflate for in the cold sequence after a 6-second inflation?

54 seconds Signup and view all the answers

What is a crucial step in maintaining de-icer boots?

Washing with mild soap and water Signup and view all the answers

How does the timer/distributor valve direct air to the de-ice boots?

By directing high-pressure air in a definite sequence Signup and view all the answers

Which components of the aircraft are included in the warm sequence for de-ice boot inflation?

Multiple components including wings and stabilizers Signup and view all the answers

How should oil and grease be removed from de-icer boots?

Use white spirit or lead-free gasoline lightly on a damp rag Signup and view all the answers

What provides information to EICAS if power is not supplied through the heater?

Current sensor Signup and view all the answers

How is the probe heater supplied with power during testing?

115-V AC power Signup and view all the answers

What are the two modes in which most heater systems operate?

Air and ground Signup and view all the answers

What is used for anti-icing in some cases?

Bleed air Signup and view all the answers

During testing, which relays are energized for the probe heater?

R7421 and R8268 Signup and view all the answers

Which systems operate at 26-V AC on ground mode and 115-V AC in air mode?

Heater systems Signup and view all the answers

What is the purpose of the engine anti-icing system mentioned in the text?

To prevent ice formation in the engine's inlet duct Signup and view all the answers

What happens if ice builds up in the engine's inlet duct?

It disrupts airflow and reduces efficiency Signup and view all the answers

Which aircraft components can be affected by ice entering the engine?

Compressor blades Signup and view all the answers

What does a blue indicator light in the cockpit signify related to the engine anti-icing system?

Anti-icing system is on Signup and view all the answers

Where is hot bleed air directed when the engine anti-icing system is activated?

Inlet guide vanes and nose dome Signup and view all the answers

Why is blue used as an indicator color for the engine anti-icing system being active?

As an advisory display since it's not a regular operating system Signup and view all the answers