Whatistherelationbetweenspeedandactualdisplacementforagearpump?
Actualdisplacementincreaseswithrotorspeeddown
B. Actualdisplacementdecreaseswithrotorspeedup
C. Actualdisplacementisconstantanddoesnotchangewithchangeinspeed
D. Noneoftheabove
Whatistheadvantageofexternalgearpumps?
A. highpressureofoutput
B. smoothandquiet
C. lowcostofproduction
D. Noneoftheabove
Gearpumpsarefixeddisplacementpumps.
A. 对
B. 错
Crescentgearpumpsarevariabledisplacementpumps.
A. 对
B. 错
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