3-20. How many modulating valve control switches are located on the left side of the wing and empennage ice panel? 1. One 2. Two 3. Three 4. Four 3-21. What switch(s) on the wing and empennage ice panel controls the outboard modulating valve on the left and right wings? 1. Inboard 2. Outboard 3. Center 4. Both 1 and 2 above 3-22. What switches will open when an overheat is sensed at 175°F and closes at 190°F? 1. Leading edge overheat warning switches 2. Wing overheat warning switches only 3. Fuselage overheat warning switches only 4. Wing and fuselage overheat warning switches 3-23. During normal operation of the de- icing system, two of the four engine bleed-air valves are open to supply bleed-air to the cross-ship manifold? 1.    True 2. False 3-24. When should the deicing manifold system be tested for leakage? 1. Before each flight 2. Before each engine turn 3. During each flight 4. Both two and three above 3-25. 3-26. 3-27. 3-28. 3-29. 3-30. The involvement of the AME 1 and AMEC in the maintenance of the deicing system normally consists of supervision only. 1. True 2. False The A-6 rain-removal system uses bleed-air from what stage of the engine compressor? 1. 12th 2. 13th 3. 14th 4. 15th Upon loss of electrical power, the nosewheel well bleed-air shutoff valve will be in what position? 1. Open 2. Closed 3. In the last selected position 4. In the manual position What type of power is used to operate the rain-removal pressure- regulator shutoff valve? 1. Hydraulic 2. Pneumatic 3. Electric 4. Manual What shutoff valve controls the airflow from the rain-removal system to the windshield? 1. Nosewheel well bleed air 2. Rain-removal pressure regulator 3.   Main-engine bleed air 4.   Cabin bleed air What total number of nozzles are on the A-6 windshield? 1. 22 2. 24 3. 26 4. 28 18