Fundamentals of Manufacturing Processes (Multiple Choice) 201800302
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The following statement about gear pumps is correct. A. The tooth ring and gears of an internal gear pump rotate in the same direction. B. Mechanical shaft seals do not require lubrication. C. Higher viscosity of the oil being transported results in less leakage and higher volumetric efficiency. D. The actual flow rate remains unchanged as the discharge pressure increases. Hint: Mechanical shaft seals will wear out rapidly without oil lubrication ； High oil viscosity makes inhalation difficult ； Gear pumps with high discharge pressure suffer from severe leakage.
A. The tooth ring of the internal gear pump rotates in the same direction as the gears
A. The tooth ring of the internal gear pump rotates in the same direction as the gears
A. The tooth ring of the internal gear pump rotates in the same direction as the gears
D. The actual flow rate remains unchanged when the discharge pressure increases
A. The tooth ring of the internal gear pump rotates in the same direction as the gears