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WorksheetsMA Summative 2
Total questions: 88
Worksheet time: 44mins
In a pneumatic system, remove and replace the __________ within scheduled intervals to prevent air-line clogging.
- Air filter elements
- Regulators
- Compressors
- Quick fittings
Filters should be used on all pneumatic systems because atmospheric air contains __________.
- Carbon
- Lead
- Dirt
- Viton
The poppet of a pressure regulator is opened by the __________.
- Upstream pressure
- Downstream pressure
- Adjustment spring
- Poppet spring
A regulator is used in pneumatics to __________.
- Remove dirt from the air
- Shut-off the compressor
- Connect three branch circuits to a supply
- Control outlet pressure in a circuit
This type of fitting connects two branch circuits to a single supply line.
- Elbow
- Tee
- Male connector
- Plug
Filters need to be chosen that __________.
- Meet the OEM specifications
- Fit the enclosure
- Fit the thread size
- Match the color of the equipment
Which of the following is not a pneumatic safety rule?
- Avoid exposure to the pressurized air
- Use proper pressure when cleaning with air
- Use any container for compressed air
- Use proper PPE
A filter's element __________.
- Increases viscosity
- Prevents oil flow
- Removes dirt from the air
- Introduces dirt into the system
__________ occurs between two connected points in a pneumatic system when a pressure differential exists.
- Vacuum
- Flow
- Pressure
- Forming
Industry uses quick connect fittings when __________.
- Possible
- Low cost is desired
- The equipment is used at high altitudes
- There is a frequent need to connect and disconnect a pneumatic conductor
The control devices used in pneumatics are called __________.
- Compressors
- Actuators
- Valves
- Conductors
When replacing O-rings, improper sizing is a common __________.
- Reason to document in PM log
- Cause of failure
- Pressure change
- Visual inspection
Which type of valve restricts flow in both directions?
- Pressure relief
- Flow control
- Needle
- None of the above
Which schematic symbol depicts energy conversion devices, such as an air motor, in a pneumatic schematic?
- Circle
- Oval
- Square
- Diamond
What assembly moves inside the barrel-shaped body of a cylinder?
- Piston/Rod
- Poppet/Spring
- Element
- Vane
The __________ causes the flexible membrane of a vacuum cup to seal itself to the load and provide a means to pick up objects without damage.
- Sticky film
- Magnetic attraction
- Static electricity
- Pressure difference
What pneumatic component provides straight line motion?
- Motor
- DCV
- Cylinder
- Muffler
The hydraulic strainer assembly is usually located within the __________, but in some applications an external strainer is located on the inlet line.
- Pump
- Reservoir
- Motor
- Filter
The 3-position, 5-way DCV is held in the middle-position by the __________.
- Operator
- Spool
- Body
- Springs
DCV stands for __________.
- Digital control variable
- Dynamic cost variable
- Directional control valve
- Directional control vane
Only approved waste containers should be used for storing __________.
- Scrap metal
- Storm water
- Spent or waste oils
- Trash
A __________ is used on a pneumatic schematic to show that branch lines split off the main line?
- Circle
- Triangle
- DOT
- Arrow
To prevent slip hazards, __________ on the factory floor should be contained and cleaned up immediately.
- Barriers and signs
- Cleaning supplies
- Test equipment
- Hydraulic oil and other fluids
What is the preferred method for measuring flow rate in a hydraulic system?
- Minutes to fill a container
- Stopwatch
- Liters per second
- Flow meter
A spin-on filter is used for __________ applications that include the return line and the suction line.
- High pressure
- All
- No
- Low pressure
Which type of flowmeter must be oriented in a vertical position?
- Rotameter
- Turbine
- Piston
- Vane
What kind of fitting is used with hoses that require frequent connection and disconnection?
- Reducer
- Quick-connect
- Bushing
- Tee
- Elbow
A pump produces __________.
- Pressure
- Flow
- Flow and pressure
- Pressure drop
The primary purpose of a __________ valve is to limit system pressure.
- Control
- Pump
- Relief
- Prime
Low pressure in a hydraulic pump's suction line causes what malfunction?
- Cavitation
- Pseudo-cavitation
- Excessive fluid viscosity
- Decrease in fluid temperature
What is the name of the valve located inside a quick-connect fitting?
- Open valve
- Ball valve
- Check valve
- Cut-off valve
A rotameter measures __________.
- Flow rate
- Temperature
- Atmosphere
- Compression
Flow rate is equal to volume divided by __________.
- Pressure
- Time
- Gallons
- Area
To read and interpret a basic hydraulic schematic, the user should __________.
- Start at the pump, then follow the fluid flow through the control valve to the actuator
- Start at the actuator, then follow the fluid flow to the pump and then to the control valve
- Start at the control valve and follow fluid flow to the pump and then to the actuator
- Start at the actuator nearest the control valve, then follow the fluid flow through the control valve to the second actuator
If lines cross but do not connect, how are they shown on a basic hydraulic schematic?
- The two lines are connected by a dot.
- One line is shown as a dashed line.
- Both lines need arrows.
- One line is drawn with a U over the other line.
The 4-way, 3-position is the most popular type of DCV used. It has three positions: one to extend the actuator, one to retract the actuator, and one to __________.
- Disable the actuator
- Exhaust air
- Stop the actuator
- Relieve pressure
DCV stands for __________.
- Dimensional control valve
- Directional comptroller valve
- Directional control valve
- Double-acting control valve
A. Which of the following is not an important step in regular maintenance of a fluid power system?
- Eliminate leaks
- Avoid high temperature
- Maintain correct fluid levels
- Exhaust air
The symbol shown represents a __________ air valve.
- 3-way solenoid valve
- 3-way spring valve
- 4-way double solenoid valve
- 4-way single solenoid spring return valve
What is the hydraulic symbol below represent?
- Variable
- Blocked line
- Conductor
- Flow direction
Which part of the cylinder is attached to another machine?
- Piston
- Rod
- Body
- Cap
Hydraulic fluid exerts pressure on the __________.
- Piston
- Operator
- Conductor
- Cylinder
The schematic symbol for a basic hydraulic component __________.
- Is the same as the picture of that component
- Is the same as the outline of that component
- Is a standard symbol for the function of that component
- Is the same symbol for each component in a single schematic
A meter-out flow control circuit __________.
- Is used to control aiding loads
- Builds back pressure at the actuator
- Is used to control opposing loads
- All of the above
Check valves are used in hydraulics to __________.
- Control flow
- Control speed
- Block flow
- Control system pressure
One common use for a __________ is to bypass the flow around certain components in one direction.
- Check valve
- Relief valve
- DCV
- Actuator
A meter-in flow control valve controls the speed of an actuator by __________.
- Applying back pressure to the actuator
- Restricting the flow to the actuator
- Diverting flow to the reservoir
- Restricting the flow from the actuator
A(n) __________ can be used when a cylinder must have differing extend and retract speeds.
- Single check valve
- Single needle valve
- Actuator
- Independent speed control
An independent speed control circuit may be needed with a double-acting cylinder because __________.
- Aiding loads are present
- Equal extend and retract speeds are needed
- Two speeds are needed during extend
- Two different pressures are needed
A flow control valve is a combination of a __________.
- Relief and DCV
- Check and a relief valve
- Needle valve and a check valve
- DCV and a needle valve
The amount of flow and the speed of the actuator can be controlled by adjusting the __________ portion of the flow control valve.
- Relief valve
- Needle valve
- DCV
- Extension valve
A meter-in flow control circuit can control the actuator speed during __________.
- Extension
- Retraction
- It doesn't control the actuator circuit
- Both A and B
The main function of a needle valve is to __________.
- Control pressure
- Control the speed of an actuator
- Turn off the flow
- Reduce pressure spikes
A(n) __________ is designed to handle the full pressure of the hydraulic system. It uses a replaceable cartridge and is enclosed in a metal casing called a bowl.
Pressure Line Filter
Return Line Filter
Off-line Filter
Inlet Line Filter
A __________ can show when DHC of a filter has been reached.
Bypass indicator
Suction line alarm
DHC valve
Filter element indicator
Placing a filter in this location allows the filter to be cleaned without shutting down the machine.
Pressure Line
Return Line
Off-line
Inlet Line
The __________, commonly used on suction or return lines, is similar in appearance to a pressure line filter but cannot withstand the full pressure of the hydraulic system.
Spin-on filter
Suction filter
Cartridge-type filter
Suction Strainer
The amount of dirt collected by a filter when the pressure reaches a predetermined point is called the __________.
Pressure limit
Dirt holding capacity
Dirt limit
Replacement point
Which hydraulic system component should be replaced when it develops high back pressure?
Flow control valve
Cylinder
Pump
Filter
__________ are rated by the size of contaminates they remove.
Hydraulic Filters
Compressors
Suction Line Strainers
Baffles
A __________ prevents large particles from damaging the pump and is placed in the reservoir.
Magnet
Filter
Strainer
Condenser
The __________ filter, used for low pressure applications, has a disposable cartridge that can be replaced.
Spin-on
Suction
Inlet Line
Suction Strainer
__________ are used to remove undissolved contaminates in hydraulic fluid.
Magnets
Filters
Baffles
Condensers
The unit of measurement for current is the __________.
Ohm
Amp
Watt
Volt
__________ current flows in only one direction.
Alternating
Absolute
Direct
Inverse
A(n) __________ electrical circuit provides a path for current to flow between the positive and negative terminals of a power supply.
Open
Closed
Incomplete
Series
A solenoid is an output device that moves in a(n) __________ motion when current is applied.
Rotary
Linear
Elliptical
Oscillatory
__________ is the amount of force exerted to move electrons.
Current
Voltage
Resistance
Power
__________ switches are operated by humans to control power flow to outputs.
Manual
Automatic
Pneumatic
Limit
Devices such as fire alarms should have the backup batteries replaced __________ to be safe.
Annually
Every 6 months or so
Bi-annually
Every decade
A(n) __________ diagram uses symbols to represent electrical devices and how they are connected.
Pictorial
Isometric
Scaled
Schematic
A pushbutton switch with a return spring is called a(n) __________ switch.
Automatic
Self-opening
Momentary
Intermittent
A(n) __________ switch uses a rotary motion to open and close contacts.
Automatic
Pushbutton
Selector
Knife
Ohms are a measurement of __________.
Voltage
Wattage
Resistance
Current
What is the function of a power supply?
Regulate voltage or current
Create smooth output voltage or current
Prevent an overload
All of the above
A tool used to sense if AC electricity is present is called a __________.
Circuit tester
Cathode
Surge protector
Circuit breaker
A(n) __________ switch is not a manually operated switch.
Pushbutton
Selector
Knife
None of the above
A switch is used to __________.
Control current
Increase voltage
Energize and de-energize circuits
Change from A/C to DC current
What are often constructed of a combination of series and parallel segments?
Circuits
Loads
Supplies
Resistors
The unit of measurement for voltage is the __________.
Ohm
Amp
Watt
Volt
Which of the following is true according to Kirchhoff's Current Law?
The sum of the branch currents will be greater than the current leaving the power supply.
The sum of the branch current will be less than the current leaving the power supply.
The sum of the branch currents will equal the amount of current leaving the power supply.
None of the above
Which term describes the amount of voltage used by a component?
Voltage exhaustion
Voltage drain
Voltage drop
Voltage fall
A __________ circuit is one in which there is only one path for current to travel.
Complex
Series
Parallel
Closed
What is a name for a device that converts electricity into work?
Converter
Load
Input device
Supply
Kirchhoff's Current Law for a series circuit states that the current entering any point in a circuit must __________ the current exiting the same point.
Double
Exceed
Exactly half
Equal
What do higher currents indicate?
Higher currents indicate that more electrons are moving in a given time period.
Higher currents indicate that electrons are moving more quickly.
Higher currents indicate that more electrons and neutrons are moving in a given time period.
Higher currents indicate that electrons and neutrons are moving more quickly.
Kirchhoff's Voltage Law for a series circuit says that the total voltage is equal to the __________.
Smallest voltage drop
Sum of the voltage drops
Product of the voltage drops
Largest voltage drop
Current is measured in __________.
Amps
Volts
Ohms
Pascals
