Engine : General Subjects - 1868/1128
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| If a hydraulic pump is producing a noisy whine when in operation, the cause may be __________. |
| A) an air leak in the pump suction line above the oil level in the reservoir |
| B) due to the wrong direction of rotation of the hydraulic motor |
| C) low viscosity in the hydraulic fluid |
| D) an oil leak across the pump shaft packing |
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