BASIC H CIRCUIT

The opened cynosure system (open centre hydraulic system) is ideal for systems that operate at:

• High pressure

• Low pressure

• Variable pressure

• Constant flow

Which of the following is an advantage of an open centre hydraulic system?

• Difficult to maintain

• Generates excessive heat

• Easier to maintain

• Expensive to design

The open centre hydraulic system is suitable for circuits that contain:

• Motors only

• Actuators other than motors

• Pumps only

• Reservoirs only

One disadvantage of the open centre system is that the fluid reservoir must be:

• Very small

• Large enough for proper cooling

• Completely sealed

• Filled with gas

Which of the following is not listed as an advantage of an open centre hydraulic system?

• Easier to maintain

• Cost less to configure and design

• Generates excessive heat

• Straightforward to diagnose

The closed cynosure system (closed centre hydraulic system) is ideal for systems that operate at:

• Lower pressure

• Variable pressure

• Higher pressure

• Constant flow

Which of the following is an advantage of a closed centre hydraulic system?

• Costs more to configure and design

• Ideal for low-pressure operation

• Requires large reservoir

• Ideal for high-pressure system

One disadvantage of the closed centre hydraulic system is:

• Difficult to diagnose

• Costs more to configure and design

• Operates at low pressure

• Needs large reservoir

Why are most hydraulic pumps operated below their maximum capacity?

• To increase the pressure

• To make them run faster

• To ensure durability

• To reduce oil usage

What happens when a hydraulic pump is operated at its maximum capacity for a long period?

• It increases the bearing’s lifespan

• It has no effect on performance

• It affects the durability of the pump’s bearings

• It reduces power consumption