Boeing 777 Anti Ice
Boeing 777 Anti Ice 15 Questions at a time (45 Questions Total)
1 / 15
What occurs when engine anti-ice is operating?
2 / 15
What position should the WING ANTI-ICE selector be in for taxiing in icing conditions?
3 / 15
What position should the ENGINE ANTI-ICE selectors be in for taxiing in icing conditions?
4 / 15
Why are the WIPER selectors set to OFF during preflight?
5 / 15
Which windows are provided with backup anti-fog heat?
6 / 15
When can engine anti-ice be operated manually?
Engine anti-ice can be operated manually both on the ground and in flight. This means that the system can be activated to prevent ice from forming on the engine during both stationary and moving conditions. The option "On the ground or in flight" indicates that the anti-ice system can be used in either situation, providing flexibility and ensuring the safety and efficiency of the engine operation. The condition of the TAT (Total Air Temperature) being above 10 degrees is not relevant to the operation of the engine anti-ice system.
7 / 15
An additional wing anti-ice inhibit for Automatic Wing Anti-ice operation (independent of the TAT inhibit), is active during the takeoff phase of flight.
Automatic wing anti-ice operation is inhibited for 10 minutes after takeoff. Manual wing anti-ice operation is not affected by this inhibit.
8 / 15
The engine anti-ice systems operate through the delivery of bleed air to the inlet cowl. The hot air for engine anti-ice is provided:
9 / 15
The pneumatic system isolation valves automatically open to maintain anti-icing to both wings if:
Whether the system is operating in Manual or Auto, if one wing anti-ice valve fails closed, the wing anti-ice system automatically closes the other valve to prevent asymmetrical wing anti-icing.
10 / 15
Only the forward windows have exterior surface anti-icing. The forward windows have exterior and interior surface anti-fogging protection. The side windows have interior surface anti-fogging protection only.
11 / 15
The WINDOW HEAT switches control heating for all flight deck windows. With the switches ON, window heat operates as soon as:
12 / 15
There are three angle-of-attack (AOA) sensors, mounted aft of and above the pitot probes on each side of the fuselage.
13 / 15
A backup anti-fogging system for the forward windows can be operated manually if there is a primary window heat system failure.
A backup anti-fogging system for the forward windows operates automatically if there is a primary window heat system failure.
14 / 15
When the Engine Anti-ice is on (either in the Auto or Manual mode), the engine is selected to: Approach Idle by the EEC.
15 / 15
The Wing Anti-ice system can operate automatically or can be selected ON-OFF manually by the crew.
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