737 Anti-ice And Rain

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| By Jorge Quintero
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Jorge Quintero
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Quizzes Created: 2 | Total Attempts: 388
| Attempts: 183
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  • 1/13 Questions

    The probe heat provides electrical heating for_______.

    • The alpha vane sensors
    • The Total Air Temperature Probe
    • The stanby pitot probe
    • All the above
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About This Quiz

This quiz assesses knowledge on the 737's anti-ice and rain systems, focusing on window heating, engine anti-ice functionality, and rain removal. It tests understanding of system operations, troubleshooting, and failure indications, crucial for safe and efficient aircraft operation.

737 Anti-ice And Rain - Quiz

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  • 2. 

     Both Engine Anti-ice switches are selected ON. The left cowl valve open light is illuminated bright blue, and the right cowl valve open light is illuminated dim blue.

    • The left cowl valve is in transit or stuck open, and the right is closed

    • The left cowl valve is in transit or stuck Closed and the right is Open

    • The right cowl valve is in transit or stuck open, and the left is open

    • The right cowl valve in transit or stuck closed, and the left is open

    Correct Answer
    A. The left cowl valve is in transit or stuck Closed and the right is Open
    Explanation
    The explanation for the given answer is that when both Engine Anti-ice switches are selected ON, the left cowl valve open light being illuminated bright blue indicates that the left cowl valve is in transit or stuck closed. On the other hand, the right cowl valve open light being illuminated dim blue indicates that the right cowl valve is open.

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  • 3. 

    The rain removal system for the flight deck windows consists of a permanent rain repellant coating and ______?

    • Windshield wipers on the sliding windows(L2&R2)

    • Fifth stage bleed air 

    • A pilot activated rain repellant spray from a reservoir located on the aft bulkhead

    • Windshield wipers on the front windows (L1&R1)

    Correct Answer
    A. Windshield wipers on the front windows (L1&R1)
    Explanation
    The correct answer is windshield wipers on the front windows (L1&R1). This is because the rain removal system for the flight deck windows consists of a permanent rain repellant coating, which helps to repel raindrops, and windshield wipers on the front windows. The windshield wipers are used to clear any remaining rain or debris from the windows, ensuring clear visibility for the pilots during flight.

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  • 4. 

    The cowl Anti-ice (Amber) light illuminated means:

    • Loss of bleed air

    • Bleed air overheat 

    • Excessive pressure in the duct

    •  Cowl Anti-ice valve is in transit or not full open 

    Correct Answer
    A. Excessive pressure in the duct
    Explanation
    The cowl Anti-ice (Amber) light illuminates when there is excessive pressure in the duct. This indicates that the pressure in the duct where the cowl anti-ice system operates is higher than normal. This could be caused by a blockage or restriction in the duct, which is causing the pressure to build up. It is important to address this issue to prevent any potential damage to the aircraft's systems.

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  • 5. 

    Both wing Anti-ice control valves close during ground operations when _________.

    • Positioning the wing Anti-ice switch off

    • Either engine thrust lever is above the takeoff warning setting

    • Either temperature sensor senses a duct over temperature

    • All the above

    Correct Answer
    A. All the above
    Explanation
    During ground operations, both wing Anti-ice control valves close when the wing Anti-ice switch is positioned off, when either engine thrust lever is above the takeoff warning setting, or when either temperature sensor detects a duct over temperature. This means that all of the mentioned conditions cause the valves to close, ensuring that the wing Anti-ice system is deactivated during ground operations.

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  • 6. 

    Positioning ENG ANTI-ICE switches ON in flight?

    • Setsstall warning logic for icing conditions

    • Uses engine bleed air regardless of engine bleed valve

    • Allows engine bleed air to flow through cowl anti-ice valve for cowl lip anti-icing

    • All the above

    Correct Answer
    A. All the above
    Explanation
    Positioning ENG ANTI-ICE switches ON in flight sets the stall warning logic for icing conditions, meaning that it activates the system that warns the pilot of possible stall due to icing. It also uses engine bleed air regardless of the engine bleed valve, which ensures that the engine anti-ice system is supplied with the necessary air. Additionally, it allows engine bleed air to flow through the cowl anti-ice valve for cowl lip anti-icing, preventing ice formation on the cowl lip. Therefore, all of the given options are correct.

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  • 7. 

    The wing anti-ice system does not provide protection for:

    • The leading edge flaps

    • The outboard leading edge slat on each wing

    • The trailing edge flaps

    • All the above 

    Correct Answer
    A. All the above 
    Explanation
    The wing anti-ice system is designed to prevent ice formation on the wings of an aircraft. However, it does not provide protection for the leading edge flaps, the outboard leading edge slat on each wing, and the trailing edge flaps. These components are not directly covered by the anti-ice system and may still be susceptible to ice formation. Therefore, the correct answer is "All the above."

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  • 8. 

    The wing Anti-ice is selected ON. The L valve open light is illuminated dim blue and the R valve open light is illuminated bright blue

    • The left anti-ice control valve is in transit or stuck open, and the right anti-ice control valve is closed

    • The left anti-ice control valve is Open, and the right anti-ice control valve is in transit or stuck Closed

    • The right anti-ice control valve is in transit or stuck open, and the left anti-ice control valve is closed

    • The right anti-ice control valve is in transit or stuck closed, and the left anti-ice control valve is closed

    Correct Answer
    A. The left anti-ice control valve is Open, and the right anti-ice control valve is in transit or stuck Closed
    Explanation
    The given answer suggests that the left anti-ice control valve is open, indicated by the dim blue illuminated light, while the right anti-ice control valve is in transit or stuck closed, indicated by the bright blue illuminated light. This means that the left wing's anti-ice system is currently active, while the right wing's anti-ice system is not functioning properly.

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  • 9. 

    Both engine Anti-ice switches are selected OFF. The left cowl valve open light is illuminated bright blue, and the right cowl valve open light is extinguished

    • The left cowl valve is in transit or stuck Open and the right cowl valve is Closed

    • The left cowl valve is in transit or stuck closed, and the left cowl valve in open

    • The right cowl valve in transit or stuck open, and the left cowl valve is open

    • The right cowl valve in transit or stuck closed, and the left cowl valve is open

    Correct Answer
    A. The left cowl valve is in transit or stuck Open and the right cowl valve is Closed
    Explanation
    The explanation for the given answer is that when both engine Anti-ice switches are selected OFF, the left cowl valve open light being illuminated bright blue indicates that the left cowl valve is in transit or stuck open. On the other hand, the right cowl valve open light being extinguished suggests that the right cowl valve is closed. Therefore, the left cowl valve is in transit or stuck open, and the right cowl valve is closed.

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  • 10. 

    A  TAI (amber) indication to the left of an N1display on the upper display indicates _______.

    • Probe heat failed

    • Wing anti-ice required

    • Insufficient air for TAI

    • The cowl anti-ice valve failed to move to the position selected by the ENG anti-ice switch, or is in transit

    Correct Answer
    A. The cowl anti-ice valve failed to move to the position selected by the ENG anti-ice switch, or is in transit
    Explanation
    The correct answer suggests that when a TAI (amber) indication is displayed to the left of an N1 display on the upper display, it indicates that the cowl anti-ice valve has failed to move to the position selected by the ENG anti-ice switch or is currently in transit. This could imply a malfunction or issue with the anti-icing system, specifically related to the cowl anti-ice valve.

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  • 11. 

    The wing Anti-ice is selected OFF. The L valve open light is illuminated bright blue, and the R valve open light is extinguished.

    • The left anti-ice control valve is in transit or stuck Open, and the right anti-ice control valve is Closed

    • The left Anti-ice control valve is in transit or stuck closed, and the right anti-ice control valve is open

    • The right anti-ice control valve in transit or stuck open, and the left anti-ice control valve is closed

    • The right Anti-ice control valve in transit or stuck closed, and the left anti-ice control valve is open

    Correct Answer
    A. The left anti-ice control valve is in transit or stuck Open, and the right anti-ice control valve is Closed
    Explanation
    The given answer states that the left anti-ice control valve is in transit or stuck open, and the right anti-ice control valve is closed. This is supported by the information provided in the question, where it is mentioned that the L valve open light is illuminated bright blue and the R valve open light is extinguished. This indicates that the left valve is open and the right valve is closed.

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  • 12. 

    Positioning the wing Anti-ice switch to ON in flight sets stall warning logic for the icing conditions_______.

    • For the remainder of the flight

    • Until the wing Anti-ice switch is OFF

    • And enables duct temperature and thrust setting logic

    • As long as both wing Anti-ice and ENG Anti-ice switches are ON

    Correct Answer
    A. For the remainder of the flight
  • 13. 

    What does the WINDOW HEAT OVERHEAT (amber) light illuminated mean?

    • Select OVHT to ensure all OVERHEAT lights illuminate

    • No action required. This is a normal condition on a hot ramp

    • PWR OFF should be selected to remove power from an overheating window

    • Overheat or electrical power interruption turned power OFF to respective window

    Correct Answer
    A. Overheat or electrical power interruption turned power OFF to respective window
    Explanation
    The correct answer suggests that the WINDOW HEAT OVERHEAT (amber) light being illuminated means that there has been an overheat or electrical power interruption that turned off the power to the respective window.

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Quiz Review Timeline (Updated): Feb 22, 2024 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Feb 22, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Feb 06, 2019
    Quiz Created by
    Jorge Quintero
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