Advanced Mechanical Questions and
Answers Already Graded A+
The two factors that control the selection of oil or grease for a bearing application are rotational
speed and _________. answer - Operating Temperature
Angular contract bearings can be mounded using the sleeve and hammer, arbor press, and
_________ mounting. answer - Temperature
Positive Displacement Pumps answer - Piston
Gear
Diaphragm
Peristolic
Rotary Vane
Positive Displacement Pros and Cons answer - Pros - accurate, variable, self priming,
Cons - wear, tolerances, costly, explodes when dead headed.
Centrifugal Pumps answer - Radial and Axial
Can be for pressure or flow
Centrifugal Pros and Cons answer - Pros- cheaper, simple, more flow, low wear, dead head
resistant (just spins).
Cons- little accuracy, not as variable (65-100%), affected by viscosity, temperature, not self
priming, seals
, Cavitation answer - Vacuum produced by pump in liquids - pulls liquids apart
It is greatly preferable to find a fault during ____________ or before the bearing is destroyed.
answer - Periodic Inspections
The constant pressure method of preloading an angular contact bearing uses a
______________. answer - Spring
The ________________ factor for bearings is similar to the service factor for the other
mechanical systems. answer - Application
#6 ???????? answer - Next to each other
The _____________ is the load a bearing feels due to all the loads and speeds applied to it.
answer - Dynamic Loads
The cause of heat build-up in a bearing can be a lack of proper lubrication, _____________, or
misalignment. answer - Overloading
Equivalent Length answer - Corners and bends reduce feet and pressure in systems.
90 corner = 3.6 FT
Long bend 90 = 2.2 FT
45 bend = 0.71 FT
Flange 45 = 0.45 FT
T - connection =
Globe/ Ball Valve = 22 FT/1/2" line
Check Valve = 3.8 FT
Answers Already Graded A+
The two factors that control the selection of oil or grease for a bearing application are rotational
speed and _________. answer - Operating Temperature
Angular contract bearings can be mounded using the sleeve and hammer, arbor press, and
_________ mounting. answer - Temperature
Positive Displacement Pumps answer - Piston
Gear
Diaphragm
Peristolic
Rotary Vane
Positive Displacement Pros and Cons answer - Pros - accurate, variable, self priming,
Cons - wear, tolerances, costly, explodes when dead headed.
Centrifugal Pumps answer - Radial and Axial
Can be for pressure or flow
Centrifugal Pros and Cons answer - Pros- cheaper, simple, more flow, low wear, dead head
resistant (just spins).
Cons- little accuracy, not as variable (65-100%), affected by viscosity, temperature, not self
priming, seals
, Cavitation answer - Vacuum produced by pump in liquids - pulls liquids apart
It is greatly preferable to find a fault during ____________ or before the bearing is destroyed.
answer - Periodic Inspections
The constant pressure method of preloading an angular contact bearing uses a
______________. answer - Spring
The ________________ factor for bearings is similar to the service factor for the other
mechanical systems. answer - Application
#6 ???????? answer - Next to each other
The _____________ is the load a bearing feels due to all the loads and speeds applied to it.
answer - Dynamic Loads
The cause of heat build-up in a bearing can be a lack of proper lubrication, _____________, or
misalignment. answer - Overloading
Equivalent Length answer - Corners and bends reduce feet and pressure in systems.
90 corner = 3.6 FT
Long bend 90 = 2.2 FT
45 bend = 0.71 FT
Flange 45 = 0.45 FT
T - connection =
Globe/ Ball Valve = 22 FT/1/2" line
Check Valve = 3.8 FT
