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WorksheetsSiemens Level 1 Hydraulic/Pneumatic #2
Total questions: 21
Worksheet time: 42mins
A pneumatic valve is defined as a “5/3-valve”. What do the numbers 5/3 mean in this definition?
The valve has a port for the exhaust.
The valve has 5 switching positions and 3 ports.
The valve has a neutral position and 4 other switching positions.
The valve has 5 ports and 3 switching positions.
The valve has 5 ports for work conductions and a neutral position.
Which statements about an electropneumatic control system are true? In the event of failure of the electrical power supply or a wire break in a DCV circuit… Two answers are correct.
a 4/2 double solenoid valve moves to the initial position.
a 3/2 spring return valve remains actuated.
a 5/2-double solenoid valve position is unchanged.
a 4/2-spring return valve remains in its current position.
a 3/2-spring return valve moves to the initial position.
What is the use of end position cushioning of a double-acting cylinder, as shown below?
It protects the cylinder against excessively high air pressure.
It reduces the noise of the escaped air.
It prevents a hard striking of the piston at the end positions.
It holds the piston in position.
It controls the speed motion of the cylinder during extension and retraction.
n a feeding application a part is pushed out from a magazine, as shown below. Which of the following statements about the operation are correct? Two answers are correct.
Hall effect sensor 1B2 is triggered when feed cylinder 1A is in its initial position.
As long as solenoid 1M1 of DCV 1V1 is energized, the feed cylinder 1A remains in the fully extended end position.
The photoelectric sensor B1 is triggered to detect that feed cylinder 1A is fully extended.
The flow control valves 1V2 and 1V3 control the feed cylinder’s stroke speed.
Hall effect sensor 1B1 is triggered when feed cylinder 1A is fully extended.
The circuit of a pneumatic gripper is shown below. Which of the following statements about the mode of operation are correct? Two answers are correct.
In initial position the gripper is open and the cylinder is fully extended.
As long as solenoid 1M2 is energized, the claw is closed.
Sensor 1B2 must be triggered to detect that the gripper is closed.
Solenoid 1M1 must be energized by the PLC to open the gripper.
The cylinder 1A must extend to close the gripper.
In the clamp application, as shown below, the system has to perform a cycle of five steps. The clamp close cylinder (gripper) 2A extends to grab the part and then the system stops. Which of the following components is the possible cause of malfunction? (It can be assumed, that the PLC program is working properly.)
Clamp extend cylinder 1A
Magnetic reed switch sensor 1B1
Magnetic reed switch sensor 1B2
Flow control valve 1V2
Inductive sensor 2B2
In a lift and transfer application, as shown below, a part is transferred on a motor driven traverse axis carriage. At the end of travel position the carriage is stopped. Cylinder 2A extends to lift the part. Next cylinder 1A extends to move the part onto the next station. If cylinder 1A fails to retract, what is the possible cause?
Flow control valve 1V2 is fully open.
Flow control valve 1V3 is fully open.
Solenoid 1M2 of directional control valve 1V1 is energized.
Air pressure is present at port 1 of directional control valve 1V1.
No air pressure is present at port 2 of directional control valve 1V1.
Different views of a pneumatic cylinder are shown below. It can be assumed that the air pressure to extend and retract the cylinder is the same. Which of the following statements about the relationship between pressure, force and cross section are correct? Two answers are correct.
The piston force exerted by the cylinder is dependent upon the air pressure, the piston diameter (cross section area) and the frictional resistance of the sealing components.
The retraction force is higher than the extension force.
The extension force is equal to the retraction force.
The extension force is higher than the retraction force.
The larger the diameter of the piston rod the higher the retraction force.
Which components in the air supply unit, as shown below, are correctly identified? Two answers are correct.
Pressure regulation valve – 3
Air filter – 1
Pressure gauge – 3
Pressure regulation valve with adjusting knob – 1
Air filter with water separator - 3
A swivel arm unit and its corresponding pneumatic circuit diagram are shown below. Which
statements about the operation are correct? Two answers are correct.
If both solenoids +SWIV-Y1 and +SWIV-Y2 are de-energized, the swivel arm moves until it reaches an end position.
The end positions of the swivel are detected by +SWIV-1V3 or +SWIV-1V4.
The swivel arm’s rotation cylinder is operated by the 5/3 double solenoid valve +SWIV-1V1.
As long as solenoid +SWIV-Y3 of DCV +SWIV-1V2 is energized, vacuum is switched on.
+SWIV-1V4 represents a pressure actuated sensor with analog output
In the machine layout shown below, a part is pushed out from the magazine. Then it is transferred along a belt conveyor unit. Finally it is picked-up by a swivel arm with vacuum suction cup and transferred to the next station. Which statements about the mode of operation are correct? Two answers are correct.
The swivel arm starts to move to the pick-up position of the belt conveyor unit. At the end of the conveyor unit the part is detected by sensor +SWIV-B1.
The vacuum must be switched on when the swivel arm sensor +SWIV-B1 is triggered.
The vacuum must be switched off when the swivel arm sensor +SWIV-B2 is triggered.
Sensor +SWIV-B1 monitors the vacuum pressure at the suction cup of the swivel arm.
The swivel arm’s movement is triggered by micro switch S3.
Which of the following statements about the operation of double-acting cylinder 1A, as shown below, are correct? Two answers are correct.
The piston rod’s retracting movement will be throttled.
1V2 allows the air to escape immediately to the atmosphere when cylinder 1A extends.
1V2 increases the stroke speed when cylinder 1A retracts.
1V2 increases the stroke speed when cylinder 1A extends.
The piston rod’s extending movement will be unthrottled.
The table below shows an overview about the common technical characteristics of a pneumatic actuator. The table belongs to a …
single-acting cylinder.
double-acting cylinder.
rotation cylinder.
vacuum generator.
rodless cylinder.
Using the circuit below, if valve 1V2 is clogged, what will happen?+
The cylinder will extend and retract.
The cylinder will extend but not retract.
The cylinder will retract but not extend.
The cylinder will neither retract nor extend.
Cylinder 1A can be damaged.
A pick-up and gripper application is shown in its initial position. Pick-up cylinder 1A moves downward completely, which is necessary for the gripper to be closed. If the gripper fails to close, what are the possible causes? Two answers are correct.
Sensor 1B2 is not triggered to detect that the pick-up cylinder 1A has reached its downward end position.
Solenoid 2M1 of DCV 2V1 is energized.
Solenoid 1M1 of DCV 1V1 is energized.
Flow control valve 2V3 is completely clogged.
Flow control valve 1V3 is completely clogged.
The pneumatic control circuit is in its initial state, as shown below. Output Q5.3 is switched on. Cylinder 1A does not extend. As shown below, the following measurements are taken. What could be the possible cause of the malfunction?
1M1 of directional control valve 1V1
Cylinder 1A
Adjustable one-way flow control valve 1V2
Sensor 1S2
Adjustable one-way flow control valve 1V3
In the subsystem, as shown below, after sensor 1S2 sends a signal to the PLC input I0.1 (status indicator associated with 1S2 is switched on). Cylinder 2A must extend but the system does not execute this step. Which of the following strategies should you take to find the fault?
check the sensor 2B2 and the cable between sensor 2B2 and the input of the PLC
check the output signal at Q5.2 of the PLC and the voltage at the solenoid 2M2 of DCV 2V1
check the voltage at the solenoid 2M1 of DCV 2V1 and the output signal at Q5.0 of the PLC
check the resistance value of solenoid 2M2
check the sensor 1S2 and the cable between sensor 1S2 and the input I0.1 of the PLC
Which statements about the mode of operation of the control system, as shown below, are true? Two answers are correct.
The retracting movement of cylinder 1A is adjusted by the flow control valve1V3.
The retracted end position of cylinder 1A will trigger sensor 1B2.
When the PLC output QX.6 is switched back from “1” to “0” the DCV 1V1 remains in its current position.
When the PLC output QX.6 is switched from “0” to “1” the DCV 1V1 changes its switching position.
A “1”-signal at the PLC input IX.5 detects, that the cylinder 1A has reached the extended end position.
In the sorting application, as shown below, parts are transported on a conveyor belt. Metal parts are pushed to track B by extending sorting cylinder 1A, plastic part are transported on track A. If both parts are transported on track A, which of the components are possibly the cause of malfunction? Two answers are correct.
Photoelectric sensor B3
Inductive sensor B2
DC motor M1
Reflector disk at the end of the conveyor
Open circuit in solenoid 1M1
Which components in this hydraulic circuit for bending a piece of sheet metal are correctly identified? Two answers are correct.
Reservoir – 1
Pump – 3
Directional control valve – 2
Relief valve – 5
Pump inlet line - 7
A part is to be lifted by a hydraulic jack, as shown below. The pressure within the fluid can be described by …
p2 = F2 x A2
p1 = F1 x A1
F1 / A1 = F2 / A2 when the system is in equilibrium
F1 = ( F2 x A2 ) / A1
F1 = ( F2 x A1 x A2 )
