Training Applications for the Electrical Controls Industry
Fluid Power Test 5
2, 3 & 4 Way Control Valves
Fluid Power Review - Section 5
00:00:00
Question 1: For operation of cylinders, the 2-way valves have very limited application because a combination of valves is required to effectively control even a single-acting cylinder. These valves are more suited to start and stop flow.
True
False
Question 2: Two-way valves may be ___________________ .
synchronized
normally open
ignored
normally closed
Question 3: The symbol shown here is a __________________________ .
Two-way Normally Open, Solenoid operated, Spring Returned DCV
Two-way Normally Closed, Solenoid operated, Spring Returned DCV
Two-way Normally Open, Hand operated, Spring Returned DCV
Two-way Normally Closed, Hand operated, Spring Returned DCV
Question 4: The symbol shown here is a _______________________ .
Two-way Normally Open, Solenoid operated, Spring Returned DCV
Two-way Normally Closed, Solenoid operated, Spring Returned DCV
Two-way Normally Open, Hand operated, Spring Returned DCV
Two-way Normally Closed, Hand operated, Spring Returned DCV
Question 5: Three-way valves have _____ main connections or ports.
2
3
4
1
Question 6: The most frequent application of 3-Way valves is for directional control. This may include control of ______________, _____________, ______________________, _________________________.
single acting cylinders
filling and draining vessels
applying and releasing a vacuum
control of non-reversible hydraulic or pneumatic motors.
None of these
Question 7: The symbol shown here is a _____________.
3-Way, Manual Lever operated, Spring return valve
3-Way, Manual Lever operated, Detented valve
3-Way, Solenoid operated, Detented valve
3-Way, Solenoid operated, Hand return, Detented valve
Question 8: This circuit is capable of placing the cylinder in a floating stop position, where it is free to follow the movement of the mechanism that it is operating.
True
False
Question 9: The rod of the cylinder is has a 2:1 ratio to the piston. Because the cylinder has such a large unbalance in areas between the blind-end and the rod-end, the cylinder ...
moves same speed, both directions.
will retract at a very slow speed
will retract at a ver rapid speed.
will extend faster than retract.
Question 10: This valving arrangement is called?
singular valving
stop action valving
regenerative valving
rapid return valving
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That's not quite right! Correct answer
True
That’s Right!
That's not quite right!Normally closed was the best answer.
That’s right!
That's not quite right! The answer is ...
Two-wayNormally Open, Solenoid operated, Spring Returned DCV
That’s right!
That's not quite right! Correct answer is Two-wayNormally Closed, Solenoid operated, Spring Returned DCV (Normal de-energized state is next to coil, oposite of spring).
That’s right!
That's not quite right! Correct answer to this question is: 3 ports
That’s right!
That's not quite right! Frequent application of 3-Way valves may incude control of single acting cylinders, filling and draining vessels, applying and releasing a vacuum, and control of non-reversible hydraulic or pneumatic motors.
That’s right!
That's not quite right! The answer was
3-Way, Manual Lever operated, Detented valve
That’s right!
That's not quite right! The answer is True. When both valves are de-energized, both pressure ports are blocked and both ports of the cylinder are open to tank.
That’s right!
That's not quite right! Because the cylinder has such a large unbalance in areas between the blind-end and the rod-end, the cylinder will retract at a very rapid speed with a reduction of cylinder force.
That’s right!
That's not quite right! This valving arrangement is called 'regenerative valving', because the oil exhausted from the rod-end is added to the flow to the blind-end.
That’s right!
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Correct Answer
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