WorksheetsBasic Hydraulics Mod 5 Pressure Control Circuits
Total questions: 10
Worksheet time: 5mins
Cylinders are sequenced in the reverse direction using a (n) ____________ (Page 157
Direct-acting sequence valve
Pressure-reducing valve
Two-sequence valve
Single-sequence valve
A reverse flow check may be needed with a PRV because ______________ (Page 164)
A pressure spike could close the PRV
An extra valve can’t hurt anything
It is needed for safety
All of the answers are correct
A check valve built into the same body with a sequence valve may be called a (n) ________-
Integral Check
Bypass Check
Reverse flow check
All of the answers are correct
A blocked drain on a sequence valve will cause ______________(Page 158)
No change in function
Reverse flow to occur
The valve to stay closed
None of the answers are correct
Sequence valves are most often used to _____________
Replace a relief valve
Avoid the cost of an electrical control circuit
Protect the pump
Control downstream pressure
The purpose of a pressure-reducing valve in a circuit is to _______________ (Page 159)
Provide for over-protection
Drop the pressure in a branch circuit
Sequence cylinder action
None of the answers are correct
A check valve is sometimes used with a sequence valve to __________ (Page 164)
Allow reverse flow
Keep the valve from leaking
Build back pressure
Prevent back-flow
Because pressure is on the downstream side of a PRV, oil will naturally seep into the _________ (Page 166)
Spring chamber
Spool
Reservoir
Tank
The pressure sequence valve operates on the principle that ___________ (Page 146)
Flow takes the path of least resistance
System pressure rises when an actuator becomes extended
Is described by Pascal’s Law
All of the answers are correct
The two types of PRV’s are ______________
Two-way and Three-way
Indirect and direct
Opened and closed
Pilot operated and direct operated
