2 Eat 10 Flashcards
A relief valve is normally
Closed
The point at which a relief valve first opens is called its _______ pressure
Cracking
A relief valve limits the ________ pressure un a hydraulic system
Maximum
The difference in pressure between the points where a relief valve first opens and passes full pump delivery is sometimes called
Override
When the chamber above the balanced piston of a relief valve is opened to tank, it is said to be
Vented
When a pressure reducing valve is vented its outlet pressure is at its ____________
Minimum pressure
Pressure reducing valves are always drained __________
Externally
If the vent connection of a relief valve is opened to tank, the pump is said to be
Unloaded
If operations take place in a certain order they are done in ________
Sequence
If a sequence valve is installed in a cylinder line it should contain a _________.
Check valve
A back pressure type valve is normally ________
Open
When used to support a loaf, the valve functions as a
Counter balance
If flow frim secondary to primary is required, the unloading valve control pressure should be ______ above the spring setting.
150 psi
Pressure in the outlet port of an internally drained sequence valve adds to the _______ setting
Spring
Pressure reducing valve with internal check valve permits _______ free flow
Reverse
When the unloading valve is ________ operated, the spring force and pressure in the primary port are independent of each other.
Remotely
A break valve is used in the ______ line of a hydraulic motor
Exhaust
A brake valve is used to prevent ________
Both a and c
Overspeeding/excessive pressure
When a load is being accelerated, pressure is maximum at the motor _______.
Inlet
A back pressur valve can also be used as an _______ valve.
Unloading
