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WorksheetsME Lab 1 - Midterm Exam (USTP)
Total questions: 80
Worksheet time: 42mins
Filters should be used on all pneumatic systems because atmospheric air contains __________.
Dust
Carbon
Lead
Viton
The poppet of a pressure regulator is opened by the __________.
Poppet spring
Upstream pressure
Adjustment spring
Downstream pressure
Pressure is a measure of __________.
Distance
Volume
Time
Force Intensity
Pneumatic symbols have been standardized by ISO which stands for __________.
International Standards Organization
International Organization for Standardization
International Systems Organization
Information Superhighway Organization
Smaller dirt particles are removed from the air by the filter's __________.
deflector
baffle
bowl
element
This assembly moves inside the barrel-shaped body of a cylinder.
Piston
Poppet
Element
Vane
Which of the following is not a pneumatic safety rule?
Do not point compressed air at eyes.
Use low pressure when cleaning with air.
Use any container for compressed air.
Use safety glasses.
Industry uses quick-connect fittings when __________.
Ever possible
There is a frequent need to connect and disconnect a hose
Low cost is desired
The equipment is used at high altitudes
DCV stands for __________.
Digital control variable
Dynamic cost variable
Directional control vane
Directional Control Valve
This fitting is used to connect two branch circuits to a single supply line.
Tee
Elbow
Male connector
Plug
A regulator is used in pneumatics to __________.
Remove dirt from the air
Provide a constant pressure to the circuit
Connect three branch circuits to a supply
Shut-off the compressor
Which fluid is most commonly used in pneumatics?
air
oil
nitrogen
Oxyacetylene
Which pneumatic component provides straight-line motion?
Motor
DCV
Muffler
Cylinder
The 3-position, 4-way DCV is held in the mid-position by the __________.
Operator
Spool
Body
Springs
The control devices used in pneumatics are called __________.
Compressors
Actuators
Valves
Conductors
The 3-port DCV is used in applications where the actuator needs to be powered in __________.
One direction
Two directions
Three directions
Four directions
Which pneumatic actuator converts compressed air flow into rotary motion?
Motor
Single-acting cylinder
Double-acting cylinder
Compressor
Symbols in pneumatics are used to show __________.
Size of components
Port locations
Function
Pressure settings
Pneumatic motors operate by using air pressure to create a turning force called __________.
Rotation
Backpressure
Torque
Uni-directional
Two of the most common design types of pneumatic motors are __________.
Turbine and piston
Lobed rotor and vane
Vane and V-type
Vane and Piston
A dashed line in a pneumatic schematic diagram represents a(n) __________.
Pilot line
Main line
Exhaust line
Enclosure line
The single-acting spring return cylinder is extended by the __________.
Load
Spring
Bushing
Pressure
To reduce the noise of a pneumatic 3-position, 4-way DCV, a __________ is used.
Spring
Muffler
Quick-connect fitting
Spool
The body of a single-acting, spring-return cylinder has __________.
No connection ports
One connection ports
Two connection ports
Multi-connection ports
Symbols in pneumatics are used to show __________.
Size of components
Pressure settings
Port locations
Function
Boyle's Law states that __________.
Pressure in a confined volume is equal
Pressure is force intensity
Volume is directly proportional to pressure
Pressure is inversely proportional to volume
To convert gauge pressure to absolute, __________.
Add atmospheric pressure to the gauge pressure
Add 14.7 psi to the psig reading
Add 101 kPa to the kPa gauge reading
All of the above
The force output of a cylinder when extending can be calculated by multiplying the pressure by the __________ area.
Rod
Piston
Annular
Stroke
Delta P is the difference in pressure between __________.
Absolute and gauge pressure
The cylinder and the rod
Two points in a pneumatic system
Four points in a pneumatic system
The net area over which the pressure acts when retracting a double-acting cylinder can be found by subtracting the rod area from the __________ area.
Piston
Surface
Cam
Bushing
Pascal's Law applies only to __________.
High octane fluids
Gases
Confined fluids
Fluids in motion
An air compressor creates __________.
Flow
Gas
Pressure
Air
The two types of resistance to airflow in a pneumatic system are __________.
Actuator load and atmospheric pressure
Pressure and area
Weight and torque
Friction and Actuator load
Pneumatic leverage refers to the ability of a pneumatic system to develop a large force output with __________.
A crowbar
A low force input
Absolute force input
Hydraulic fluid
Flow occurs between two connected points in a pneumatic system when __________.
there is a vacuum
a pressure differential exists
there is high pressure
pressure is the same at both points
Pressure beyond that to overcome all resistive loads determines __________.
Delta P
Actuator force
Actuator speed
Back pressure
Two common types of check valves used in pneumatics are the __________.
Spool and sleeve
Vane and rotor
Radial and axial
Ball and poppet
Which of the following is not a part of a flow control valve?
Body
Vane
Adjustment screw
Check valve
If the load on an actuator is changed, the pressure required to move the load will __________.
also change
remain the same
compensate the DCV
cause the vane to stall
The placing of a needle valve or a flow control valve in the pressure port of a DCV will make the circuit a __________.
Meter-out application
Meter-in application
Higher speed application
Higher pressure application
An independent speed control circuit may be needed with a double-acting cylinder because __________.
Aiding loads are present
The supply pressure varies
Identical extend and retract speeds are needed.
Two speeds are needed during retract
A pneumatic flow control valve is a combination of a __________.
Flowmeter and a check valve
DCV and a check valve
Needle valve and a check valve
Needle valve and a restrictor valve
The function of a needle valve in a pneumatic circuit is to __________.
Regulate pressure
Block flow in one direction
Measure flow rate
Control air flow rate
A meter-out flow control circuit controls the speed of an actuator by __________.
Applying back pressure to the actuator
Exhausting excess air
Restricting the airflow to the actuator
Reducing the supply pressure
The flow rate of air is the amount of air that passes through a system __________.
In a certain amount of time
At a given temperature
And is not returned to the atmosphere
Before the compressor is started
The function of a flowmeter for industrial requirements is often __________.
To verify air flow and performance of both old and new components
To check the change in pressure across a valve
To verify that the atmospheric conditions will allow the system to function
All of the above
A check valve is considered to be a(n) __________.
Pressure regulator
Directional control
Actuator
Operator
The placing of a needle valve or flow control valve in the exhaust port of a DCV will make the circuit a __________.
Meter-out application
Meter-in application
Higher speed application
Higher pressure application
The control of the air flow in a pneumatic needle valve is accomplished by __________.
The inlet port
The outlet port
The adjustment screw
The air pressure
The way to read a rotameter is to read the scale __________.
Top of the ball
Center of the ball
Bottom of the ball
None of the above
What step does every scientific experiment begin with?
hypothesis
question/problem
procedures
conclusion
Another word for prediction or educated guess is: ________________
hypothesis
conclusion
experiment
data
The information you record in an experiment is called your ____________.
data
conclusions
notebook
inquiry
After a scientific experiment is performed, data is recorded, and conclusions are drawn, what should be done next?
Share your research with other scientists
Keep your research a secret
Destroy all evidence of your experiment
List the Scientific Process steps in order.
Observation, Question, Hypothesis, Experiment, Data, Conclusion
Conclusion, Observation, Experiment, Data, Hypothesis
Observation, Experiment, Hypothesis, Conclusion, Data, Question
None of the above
Explaining or interpreting the observations is called _____?
observation
inference
question
Using your senses to gather information is called an _____?
observation
inference
question
Area increases
Pressure increases
Pressure decreases
Area decreases
None of the above
The pressure in a liquid or gas is measures by a _________.
Viscosity
Pressure Plate
Pressure Gauge
Pressure Counter
The pressure exerted by a liquid
increases with depth.
decreases with depth.
is constant
first increases and then decreases.
The pressure of the water at the bottom of a pond is ___ at the surface of the pond.
either lower or higher
higher than
same
lower than
Which of the following does not affect the pressure beneath the surface of a liquid?
Strength of the gravitational field
Area of the liquid surface
Density of the liquid
Depth of the liquid
This is the rear of a fuel pressure gauge.
What type of mechanism does this gauge use?
bourdon tube
ratiometer
synchro system
bi-metallic helix
Pneumatic leverage refers to the ability of a pneumatic system to develop a large force output with:
A crow bar
A low force input
Absolute force input
Hydraulic fluid
Atmospheric pressure is measured by a
Barometer
Manometer
Cycle manometer
A gas is at a pressure of 95 kPa. What is its pressure in atmospheres?
1.5 atm
1.09 atm
0.94 atm
0.82 atm
