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Block 8 Quiz 1
Quiz 1 ( Q2 )
Question | Answer |
---|---|
Skydrol® is dyed ______________ in color? | Purple |
Depressurization of the hydraulic system is NOT necessary when servicing closed hydraulic components. | False |
In the absence of a specific replacement instructions, a recommended service life of return filters are: | 1,500 hours |
Pascal's Law states that pressure applied to any part of a confined liquid is transmitted with undiminished intensity to every other part. | True |
What is viscosity in reference to aircraft hydraulic systems. | A measure of a hydraulic fluid's internal resistance to flow. |
6. The three principal categories of hydraulic fluids are: (This question has multiple answers) | Phosphate esters, Polyalphaolefins, Minerals |
7. What mineral-based hydraulic fluid can be used as a rust-inhibitor alternative to MIL-H-5606? | MIL-H-6083 |
8. Aircraft hydraulic systems designed around Skydrol® fluids should be virtually trouble-free if properly serviced. | True |
9. What are the two general types of contamination found within hydraulic systems? | abrasives and non abrasives |
10. During a routine contamination check, hydraulic fluid that appears to be visibly clean is good/usable fluid. | False |
11. Skydrol® is a registered trade name of which company? | Monsanto Chemical Co. |
12. Which of the following seals is not compatible with Skydrol®? | neoprene and Buna-N |
13. Hydraulic operations are roughly ___________ percent efficient, with _______________ loss due to friction. | 100, negligible |
14. MIL-H-5606 is dyed ______________ in color? | Red |
15. In addition to viscosity, what are three important characteristics of hydraulic fluids that manufactures take into account? | fire point, flash point, and chemical stability |
16. One of the main advantages of Skydrol® is its ___________________ | wide operating temperatures. |
17. When performing a "clean cycling" of a hydraulic system suspected of contamination, a hydraulic ground power unit (HGPU) should be used to clean the system. | False |
18. When taking hydraulic samples for testing, always drain ______________ of fluid before taking the tested sample. | 1 pint |
19. System operating pressure may vary from a couple hundred PSI in small aircraft and rotorcraft to _____ in large transports. | 5,000 psi |
20. Which hydraulic fluid is polyalphaolefin based? | MIL-H-83282 |