Systems Questions and Answers With Complete Solutions

Normal hydraulic system pressure is: A. Between 2500 psi-2800 psi B. 3000 PSI C. 3200 PSI D. PSI B The PTU uses hYD 1 system power to provide HYD 2 system pressure. T/F True During takeoff and landing with the PTU switch in the AUTO position, with the flaps out of zero, the PTU: A. Keeps system 2 fluid levels at a constant level to prevent system failure B. Is activated by system logic if engine one fails or engine one EDP fails C. Is activated by system logic upon parking brake release with weight on wheels D. Is activated by system logic if engine 2 fails or engine 2 EDP fails and gear lever is selected up or down. D After starting engine 1 and parking brake released, the electric hydraulic pump 2 automatically comes on to provide________ A. Nose wheel steering B. Inboard brakes C. Both A & B D. HYD system 2 pressure to prevent "HYD 2 FAIL" EICAS message C The HYD system 3 Unloader valve and flow limiter valve are used to ___ A. Relieve excessive system pressure after the engines are shut down B. Avoid overloading the rat during an electrical emergency. C. Assist the bootstrap Reservoir in maintaining system pressure and D. Allow maintenance to service the system without completely draining the fluid. B Hydraulic system one and hydraulic system two are able to mix in the bootstrap Reservoir via the system filter casing. T/F False When the hydraulic system one and two engine driven pump, shut off buttons are pressed, the: A. Edp's are shut down B. Hydraulic shut off valves are closed. C. Respective EDP's, isolated from the associated hydraulic system reservoirs D. Both B & C D