INTRODUCTION OBJECTIVES - Plant Services

Chapter 4 — Hydraulic Pumps 129MULTIPLE CHOICE1. Fixed-displacement pumps are rated by fluid flow and ___.A. electrical requirementsB. housing sizeC. pressure ratingD. speed2. Hydraulic pump types include gear, vane, and ___ pumps.A. centrifugalB. gerotorC. lobeD. piston3. ___ is a localized gaseous condition within a stream of fluid that occurs when pressureis reduced to vapor pressure.A. CavitationB. ImplosionC. PseudocavitationD. all of the above4. A lobe pump requires ___ to drive the lobe-shaped driven gears.A. lobe gearsB. pistonsC. timing beltsD. timing gears5. ___ is the volume of hydraulic fluid moved during each revolution of the shaft ofa pump.A. DisplacementB. Gallons per minuteC. Revolutions per minuteD. Volumetric efficiency6. A ___ pump has an inner rotor that meshes with the gear teeth of an outer rotor.A. gerotorB. lobeC. pistonD. vane7. A variable-displacement pump varies the amount of hydraulic fluid with movableinternal components while the ___ of the prime mover remains fixed.A. displacementB. gpmC. rpmD. volumetric efficiency