DSL 109 HHP PUMP COMPENSATE

When a Pressure-Compensating (PC) hydraulic system has the DCVs in a neutral position, what happens to the system flow and pressure?

• System flow drops to near zero and pressure rises to the compensator setting.

• System flow increases and pressure drops to zero.

• Both system flow and pressure drop to zero.

• System flow and pressure remain constant at maximum values.

Which of the following best describes the advantages and disadvantages of a pressure-compensating hydraulic system?

• It maintains constant pressure and improves efficiency, but can be more complex and expensive.

• It increases system pressure and reduces efficiency, but is simple and inexpensive.

• It eliminates the need for maintenance and reduces system pressure, but is less efficient.

• It only works at low pressures and is not suitable for industrial applications.

Open-center hydraulic systems are not operated at a constant high system pressure because:

• It would cause unnecessary energy loss and heat generation.

• It increases the speed of the system.

• It improves the efficiency of the pump.

• It allows for continuous fluid flow at all times.

Refer to the diagram titled 'Pressure-Compensating Pump Symbols.' Which of the following best describes the function of a pressure-compensating pump?

• Maintains constant flow regardless of pressure changes

• Maintains constant pressure regardless of flow changes

• Increases pressure as flow increases

• Decreases pressure as flow increases

Refer to the diagram titled 'Pressure-Compensating Pump Symbols.' The component labeled as 'PC pump' in each symbol is responsible for _________?

• compensating for pressure changes in the hydraulic system

• increasing the temperature of the hydraulic fluid

• filtering contaminants from the hydraulic fluid

• regulating the speed of the hydraulic motor

Refer to the diagram titled 'Pressure-Compensating Pump Symbols.' True or False: All three symbols shown represent different configurations of pressure-compensating pumps.

• True

• False

One type of PC System Pump Design is _________

• Variable vane

• Fixed gear

• Rotary piston

• Axial flow

One type of PC System Pump Design is _________

• Bent-axis piston

• Centrifugal fan

• Scroll compressor

• Rotary vane

One type of PC System Pump Design is _________

• Inline axial piston

• Radial fan

• Rotary vane

• Centrifugal blower

One type of PC System Pump Design is _________

• Radial piston

• Axial fan

• Scroll compressor

• Rotary evaporator