LESSON 2
PRACTICE EXERCISE
The following items will test your grasp of the material covered in this lesson. There is only one correct
answer for each item. When you have completed the exercise, check your answers with the answer key
that follows. If you answer any item incorrectly, study again that part of the lesson which contains the
portion involved.
1.
The piston in a double-action actuating cylinder can--
___ A. retract only.
___ B. extend only.
___ C. retract and extend.
___ D. neither extend nor retract.
2.
What type of valve prevents feedback through the servo to the control stick?
___ A. Ratchet valve.
___ B. Spool selector valve.
___ C. Orifice check valve.
___ D. Irreversible valve.
3.
What is used to limit system pressure?
___ A. Relief valve.
___ B. Check valve.
___ C. Ratchet valve.
___ D. Selector valve.
4.
What type of valve is installed in a closed-center hydraulic system?
___ A. Return valve.
___ B. Check valve.
___ C. Ratchet valve.
___ D. Selector valve.
5.
What controls the direction of fluid flow?
___ A. Relief valve.
___ B. Check valve.
___ C. Ratchet valve.
___ D. Selector valve.
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