B777 Anti-ice and RainHome / Quiz Page / B777 Anti-ice and Rain 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? The ENGINE ANTI-ICE ON memo message displays. Probe heat switches from reduced to full power. Approach idle is selected. The backup window system heat system operated. 2 / 15 What position of the ANTI-ICE selectors will remove the ANTI-ICE ON EICAS message? OFF. Both A and B are correct. AUTO. ON. 3 / 15 The pneumatic system isolation valves automatically open to maintain anti-icing to both wings if: A bleed source is lost and bleed duct isolation has not occurred. A bleed source is lost. A bleed source is degraded. A bleed source is lost or degraded. 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. 4 / 15 Does Wing Anti-ice operate when the aircraft is on the ground? True. False. 5 / 15 If the total air temperature (TAT) is above 10 deg.C, both Manual and Automatic wing anti-ice operation is inhibited for: 2 minutes after takeoff. 3 minutes after takeoff. 5 minutes after takeoff. 4 minutes after takeoff. The TAT inhibit is removed any time TAT drops below 10 deg.C. 6 / 15 The automatic ice detection system consists of: Three ice detector probes, one on the left side of the forward fuselage and the two others on the right side. Two ice detector probes, one on each side of the forward fuselage. Three ice detector probes, two on the left side of the forward fuselage and the third one on the right side. One ice detector probe on the right side of the fuselage. 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. 7 / 15 A backup anti-fogging system for the flight deck windows operates automatically if there is a primary window heat system failure. True. False. A backup anti-fogging system is available for the forward windows only: it operates automatically if there is a primary window heat system failure. 8 / 15 There are no controls for the operation of Probe Heat. False. True. Indications are provided on the EICAS when one or more probe heaters are not operating. 9 / 15 With Engine Anti-ice On, the display of "EAI" appears ___________ the N1 displays. Above Below 10 / 15 The Wing Anti-ice system operates through the delivery of hot air to the three midwing slats. False. True. The hot air for wing anti-ice is provided by the pneumatic system. 11 / 15 The bleed air for Engine Anti-ice comes directly from the associated engine and not from the Pneumatic System ducting. True. False. 12 / 15 The Wing Anti-ice system is controlled by the Wing Anti-ice switch. The switch has 3 positions. The bleed air for Wing Anti-ice comes from the Pneumatic System ducting and flows to each wing through: A common anti-ice valve A separate anti-ice valve. Two identical anti-ice valves. Three identical anti-ice valves. 13 / 15 Probe Heat automatically operates when either engine is operating. The TAT is only operated on the ground when icing is detected. The TAT is only operated on the ground when the OAT is at or below 10 deg.C. The TAT is not heated on the ground. The TAT is only operated on the ground when the OAT is at or below 10 deg.C or when icing is detected. The level of heat provided to the pitot probes is automatically set a lower level on the ground to protect from over heating the elements. Full heat level is provided in flight. 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. High idle by the bleed air system. High idle by the EEC. Approach idle by the EEC. Approach idle by the pneumatic air system. 15 / 15 The AOA vanes are heated: At all time when AC power is on. At all time when DC power is on. On the ground and in flight when either engine is operating. At all time when AC or DC power is on. The AOA has only one temperature level. Your score is