Regarding the hydraulic hose installation illustrated, the hose __________. See illustration GS-0064.
• Consider how a hydraulic hose changes length and diameter when it is pressurized. • Look at where the hose is restrained or clamped in the illustration and which part is free to move. • Think about the effect of flow from left to right on a hose that may already have some twist or tension in it.
• Which part of the hose has the most freedom to bulge or change shape when pressure comes on: the section nearer the left fitting, the right fitting, or is it secured evenly? • If the hose tries to straighten or shorten under pressure, which fitting would feel the greatest pull: the left or the right side? • Does the picture suggest a neat, straight installation or one that is slightly twisted or strained between the two ends?
• Identify which side of the hose appears more twisted or strained in the drawing. • Decide whether the hose looks properly supported or if one end could be pulled by pressure and movement. • Before choosing, ask: Would this setup be considered good practice for hydraulic hoses on a vessel, or does something look likely to move or come loose?
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