TPC 305 PUMP ACTUAL EXAMS SCRIPT QUESTIONS
AND ANSWERS SURE A+
✔✔Anti friction bearing cages - ✔✔Carries no load and is subject to little wear
✔✔Lubrication of anti friction bearings - ✔✔High speed operations, oil is used because
it dissipates heat better
✔✔10BC02 - ✔✔BC is standard letter and type, single row ball bearing boundary
dimensions given in millimeters
✔✔ABEC and RBEC numbers - ✔✔Wider tolerances, -9 more precise
✔✔Running accuracy of bearings - ✔✔Radial runout, allowable of out of roundness
✔✔Limitation of anti friction bearings - ✔✔Lack of resistance to fatigue
✔✔Premature bearing failure - ✔✔Misalignment and excessive runout
✔✔Fixed and floating bearings - ✔✔Fastened axially to the shaft but can float, carries
the thrust load
✔✔Squareness and alignment - ✔✔Max runout of .0001 in shoulders
✔✔Double row, angular contact bearings - ✔✔Resist loads from any direction
✔✔Staggered roller bearing - ✔✔Extra load carrying capacity, advantage of saving
space
✔✔Cylindrical roller bearings - ✔✔Handle heavy loads at higher speeds
✔✔Spherical roller bearings - ✔✔Support high radial or combined loads
, ✔✔Tapered roller bearings - ✔✔The cup, the outer ring of other bearings
✔✔Tapered roller thrust bearing - ✔✔High thrust loads and heavy shock may be
expected
✔✔Self aligning bearings - ✔✔Automatically adjust to misalignment
✔✔Linear motion bearings - ✔✔Ladder bearings
✔✔Open ball bushing - ✔✔Suitable for reducing shaft deflection
✔✔Takeups - ✔✔Permit adjustment of the shaft center distances of belts
✔✔Oil seal - ✔✔Width of an oil seal of outer case
✔✔Seal selection - ✔✔Speed of shaft surface in feet per minute
✔✔Synthetic seal - ✔✔Shafts must be ground or polished to a very fine finish
✔✔Grease hardness - ✔✔0 to 6
✔✔Packing bearings - ✔✔One third to one half full
✔✔Bearing brinnelling - ✔✔Indentations on each ball
✔✔Archimedean screw - ✔✔Broad threaded screw encased in a cylinder or open
trough
✔✔Water pumping - ✔✔Centrifugal pump
✔✔Chemical products in piping - ✔✔Piping systems must be fully insulated
✔✔Waste pumping - ✔✔Centrifugal pumps, low head and small solid particles
✔✔High viscosity material - ✔✔Positive displacement both rotary and reciprocating
✔✔Solids pumping - ✔✔Handle greases, heavy mastics, cement, concrete, and similar
materials. Use piston pumps
✔✔Boiler feeder systems, metering pumps... - ✔✔Chemicals
✔✔Suction lift pump - ✔✔Eye of impeller above fluid level
AND ANSWERS SURE A+
✔✔Anti friction bearing cages - ✔✔Carries no load and is subject to little wear
✔✔Lubrication of anti friction bearings - ✔✔High speed operations, oil is used because
it dissipates heat better
✔✔10BC02 - ✔✔BC is standard letter and type, single row ball bearing boundary
dimensions given in millimeters
✔✔ABEC and RBEC numbers - ✔✔Wider tolerances, -9 more precise
✔✔Running accuracy of bearings - ✔✔Radial runout, allowable of out of roundness
✔✔Limitation of anti friction bearings - ✔✔Lack of resistance to fatigue
✔✔Premature bearing failure - ✔✔Misalignment and excessive runout
✔✔Fixed and floating bearings - ✔✔Fastened axially to the shaft but can float, carries
the thrust load
✔✔Squareness and alignment - ✔✔Max runout of .0001 in shoulders
✔✔Double row, angular contact bearings - ✔✔Resist loads from any direction
✔✔Staggered roller bearing - ✔✔Extra load carrying capacity, advantage of saving
space
✔✔Cylindrical roller bearings - ✔✔Handle heavy loads at higher speeds
✔✔Spherical roller bearings - ✔✔Support high radial or combined loads
, ✔✔Tapered roller bearings - ✔✔The cup, the outer ring of other bearings
✔✔Tapered roller thrust bearing - ✔✔High thrust loads and heavy shock may be
expected
✔✔Self aligning bearings - ✔✔Automatically adjust to misalignment
✔✔Linear motion bearings - ✔✔Ladder bearings
✔✔Open ball bushing - ✔✔Suitable for reducing shaft deflection
✔✔Takeups - ✔✔Permit adjustment of the shaft center distances of belts
✔✔Oil seal - ✔✔Width of an oil seal of outer case
✔✔Seal selection - ✔✔Speed of shaft surface in feet per minute
✔✔Synthetic seal - ✔✔Shafts must be ground or polished to a very fine finish
✔✔Grease hardness - ✔✔0 to 6
✔✔Packing bearings - ✔✔One third to one half full
✔✔Bearing brinnelling - ✔✔Indentations on each ball
✔✔Archimedean screw - ✔✔Broad threaded screw encased in a cylinder or open
trough
✔✔Water pumping - ✔✔Centrifugal pump
✔✔Chemical products in piping - ✔✔Piping systems must be fully insulated
✔✔Waste pumping - ✔✔Centrifugal pumps, low head and small solid particles
✔✔High viscosity material - ✔✔Positive displacement both rotary and reciprocating
✔✔Solids pumping - ✔✔Handle greases, heavy mastics, cement, concrete, and similar
materials. Use piston pumps
✔✔Boiler feeder systems, metering pumps... - ✔✔Chemicals
✔✔Suction lift pump - ✔✔Eye of impeller above fluid level
