Boeing 777 Anti Ice
Boeing 777 Anti Ice 15 Questions at a time (45 Questions Total)
1 / 15
What position should the WING ANTI-ICE selector be in for taxiing in icing conditions?
2 / 15
When will the ANTI-ICE ON EICAS message be displayed?
3 / 15
Why are the WIPER selectors set to OFF during preflight?
4 / 15
Why are the wipers never operated on a dry windshiled?
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
Window heat - An INOP light illuminates in the respective switch when:
8 / 15
The automatic ice detection system consists of:
The detector probes normally vibrate when the detection system is operating. If ice accumulates on a probe, the probe will vibrate at a lower frequency. The probe heater will turn on to melt the ice until the vibration frequency returns to normal. Once a detector probe has ice build-up, it is automatically de-iced.
9 / 15
The WINDOW HEAT switches control heating for all flight deck windows. With the switches ON, window heat operates as soon as:
10 / 15
A backup anti-fogging system for the flight deck windows operates automatically if there is a primary window heat system failure.
A backup anti-fogging system is available for the forward windows only: it operates automatically if there is a primary window heat system failure.
11 / 15
There are no controls for the operation of Probe Heat.
Indications are provided on the EICAS when one or more probe heaters are not operating.
12 / 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.
13 / 15
The bleed air for Engine Anti-ice comes directly from the associated engine and not from the Pneumatic System ducting.
14 / 15
With the WING ANTI-ICE selectors set to AUTO in flight, the wing anti-icing valves open when icing conditions exist and bleed air pressure is available.
15 / 15
What does the EAI indicate when displayed on the Primary EICAS N1 indication?
The correct answer indicates that the engine anti-ice system is open. This means that the system is actively providing anti-ice protection to the engine, preventing ice from forming and potentially causing damage.
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