Chapter 6 Hydraulic

In a directional control valve, port receives fluid flow from the pump, while port returns fluid flow to the reservoir.

• A; B

• B; A

• P; T

• T; P

A __ center position directional control valve allows a hydraulic system to operate with more than one actuator and with each actuator operating independently of the others.

• closed

• float

• open

• tandem

A __ is an internal component of a directional control valve that is used to control fluid flow and to connect internal passages and ports.

• actuator

• piston

• plunger

• spool

There are __ different subplate designs

• two

• seven

• nine

• ten

A __ center position directional control valve is used to hold the piston in a cylinder in the desired position while allowing fluid flow to be directed back to the reservoir without the need to activate a relief valve.

• closed

• float

• open

• tandem

__ mounting is a method that uses tubing or threaded pipes that connect directly to a directional control valve.

• In-line

• Manifold subplate

• Pipe

• Valve

A directional control valve __ is a mechanism that is used to move the position of the spool in a directional control valve.

• actuator

• handle

• positioner

• slide

Solenoids alone are not strong enough to move a directional control valve spool when the fluid flow is greater than __ gpm.

• 20

• 25

• 35

• 50

In a directional control valve schematic symbol __ the position boxes depict the direction of fluid flow for each spool position.

• external arrows outside

• internal arrows inside

• diagonal lines outside

• T-shaped symbols

A hydraulic system that does not have a variable displacement, pressure compensated pump typically uses a(n)_____ centered or _____- center position directional control valve so that the hydraulic fluid can be returned to the reservoir

• closed; float

• float, tandem

• open; closed

• open, tandem