IMT 131 Final, Study Materials || A+ Graded Already.
3 Functions of a Reservoir correct answers Cooling.
De-Aeration.
Contaminate Settling.
Baffels correct answers Prevent turbulence in the same area of the tank that the pump inlet is in.
Slows fluid movement.
Allow contaminate to settle.
Allow entrapped air to dissipate from the fluid.
Help to remove heat by adding more surface area to the tank walls.
Fluid Requirements correct answers Transmit Power.
Lubricate moving parts.
Seal clearances.
Heat dissipation.
Viscosity correct answers The measure of a fluids resistance to flow.
Different testing methods are used.
Low viscosity fluids flow easily.
High viscosity fluids flow slower.
Petroleum Based Fluids correct answers Most widely used.
Factors affecting characteristics:
-type of crude
-refining methods
-additives
Excellent lubrication properties.
Natural protection against rust.
Fire Resistant Fluids correct answers Are NOT fire proof!
, 4 major types.
Are not, generally, compatible with other fluids an some seals.
Water Based
Microns correct answers Contaminate particles are measured in microns.
1 micron = 1 millionth of a meter.
1 micron = 39 millionths of an inch.
1 grain of table salt = 100 microns.
Human hair is approximately 74 microns thick.
The human eye sight is limited to approximately 40 micron; therefore, contamination checks can
not be conducted visually.
Inlet Strainers correct answers Fine mesh wire, protects the pump from particles about 150 u in
size.
Must allow the full pump volume to pass through within the permitted pressure drop for that
pump.
Must allow fluid to bypass the strainer if the strainer element becomes blocked.
May be in the tank or between the tank & the pump.
Contamination correct answers It is estimated that more than 80% of hydraulic system failures
are due to poor fluid conditions.
Wastes energy.
Wastes fluid.
Wastes production time.
Keeps maintenance busy.
Displacement correct answers Amount of fluid transferred in 1 revolution, expressed in cubic
inches per revolution.
Flow capacity of a pump is given as GPM or LPM.
3 Functions of a Reservoir correct answers Cooling.
De-Aeration.
Contaminate Settling.
Baffels correct answers Prevent turbulence in the same area of the tank that the pump inlet is in.
Slows fluid movement.
Allow contaminate to settle.
Allow entrapped air to dissipate from the fluid.
Help to remove heat by adding more surface area to the tank walls.
Fluid Requirements correct answers Transmit Power.
Lubricate moving parts.
Seal clearances.
Heat dissipation.
Viscosity correct answers The measure of a fluids resistance to flow.
Different testing methods are used.
Low viscosity fluids flow easily.
High viscosity fluids flow slower.
Petroleum Based Fluids correct answers Most widely used.
Factors affecting characteristics:
-type of crude
-refining methods
-additives
Excellent lubrication properties.
Natural protection against rust.
Fire Resistant Fluids correct answers Are NOT fire proof!
, 4 major types.
Are not, generally, compatible with other fluids an some seals.
Water Based
Microns correct answers Contaminate particles are measured in microns.
1 micron = 1 millionth of a meter.
1 micron = 39 millionths of an inch.
1 grain of table salt = 100 microns.
Human hair is approximately 74 microns thick.
The human eye sight is limited to approximately 40 micron; therefore, contamination checks can
not be conducted visually.
Inlet Strainers correct answers Fine mesh wire, protects the pump from particles about 150 u in
size.
Must allow the full pump volume to pass through within the permitted pressure drop for that
pump.
Must allow fluid to bypass the strainer if the strainer element becomes blocked.
May be in the tank or between the tank & the pump.
Contamination correct answers It is estimated that more than 80% of hydraulic system failures
are due to poor fluid conditions.
Wastes energy.
Wastes fluid.
Wastes production time.
Keeps maintenance busy.
Displacement correct answers Amount of fluid transferred in 1 revolution, expressed in cubic
inches per revolution.
Flow capacity of a pump is given as GPM or LPM.
