Question 291General Subjects - QMED
70% to passWhy is the discharge pressure of a herringbone gear pump steadier than the discharge pressure of a simple spur gear pump?
AOne discharge phase begins before the previous discharge phase has been completed.
BThe herringbone gear pump has four spur gears instead of two.
CClearance between the gear teeth and casing is smaller.
DThe gear teeth are smaller than those of the simple spur gear pump.
AI Explanation
A) One discharge phase begins before the previous discharge phase has been completed. This is the correct answer. The reason is that in a herringbone gear pump, the discharge phases of the two sets of gears overlap, resulting in a steadier discharge pressure compared to a simple spur gear pump. As one set of gears completes its discharge phase, the other set begins its discharge phase, creating a more continuous flow and a smoother discharge pressure. The other options are incorrect because they do not directly explain the reason for the steadier discharge pressure in a herringbone gear pump.
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