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- 1. Multiple Choice
Pneumatic motors are actuators that convert fluid energy into:
rotational pressure energy
rotational flow energy
rotational mechanical energy
rotational electrical energy
- 2. Multiple Choice
Cylinders are actuators that convert fluid energy into:
linear pressure energy
linear flow energy
linear mechanical energy
linear electrical energy
- 3. Multiple Choice
Air bearings are fluid power acturators that reduce or eliminate:
flow
pressure
friction
all of the above
- 4. Multiple Choice
They convert pressure into a dial reading:
Pneumatic motors
Pneumatic gauges
Air bearings
Cylinders
- 5. Multiple Choice
What does this symbol represent
3 WAY / 2 POSITION DIRECTIONAL CONTROL VALVE
4 WAY / 2 POSITION DIRECTIONAL CONTROL VALVE
3 WAY / 2 POSITION DIRECTIONAL CONTROL VALVE
2 WAY / 2 POSITION DIRECTIONAL CONTROL VALVE SPRING RETURN
- 6. Multiple Choice
What does this symbol represent
lever
push button
foot pedal
emergency stop
- 7. Multiple Choice
What does this symbol represent
ball valve
check valve
shut off valve
pascal valve
- 8. Multiple Choice
What does this symbol represent
needle valve
quick exhaust valve
logic function valve
flow control valve
- 9. Multiple Choice
What does this symbol represent
relief valve
reducing valve
sequence valve
regulator valve
- 10. Multiple Choice
The fluid power devices that convert the energy of a pressurized fluid into mechanical energy to do work are called
activators
actuators
accumulators
converters
- 11. Multiple Choice
Which gas is commonly used in Pneumatics ?
Oxygen
Air
Hydrogen
Nitrogen
- 12. Multiple Choice
Which two properties of compressed air make possible smooth acceleration and reversal of direction of mechanical motions?
Easy to store and very fast working medium
Elastic and very fast working medium
Compressible and elastic
Efficient and compressible
- 13. Multiple Choice
Which of the following is not considered as an advantage of compressed air?
Offers little risk of explosion
No return line necessary
Humidity may not be present
Enables high working speed to be obtained
- 14. Multiple Choice
Mechanical energy is converted into fluid power when air is
compressed
exhausted
absent
extended
- 15. Multiple Choice
Which component is used to measure the pressure in a pneumatic circuit?
Lubricator
Pressure gauge
Flow control valve
Regulator
- 16. Multiple Choice
Relief valves are used to
Limit the minimum pressure in a system
to control the flow rate in a system
limit the maximum pressure in a system
to control the pressure in a system
- 17. Multiple Choice
Which component is used to set the pressure in a pneumatic circuit?
Lubricator
Pressure gauage
Flow control valve
Pressure regulator
- 18. Multiple Choice
Accumulators are used to
provide a short term supply of compressed air to a particular
cold compressed air before entering the circuit
compress air to a particular value
maintain a constant pressure in a circuit
- 19. Multiple Choice
Which of the following components is not a part of the conditioning unit?
Shutoff valve
Pressure gauge
Flow control valve
Pressure regulator
- 20. Multiple Choice
What is the purpose of a receiver in a Pneumatic system?
To filter the water
To increase the pressure
To accumulate the air to minimize starts and stops
To support the compressor
- 21. Multiple Choice
Pneumatic systems are often preferred to electrical, mechanical or hydraulic systems because
they are more efficient
they are more powerful
they are less expensive
they use an available medium
- 22. Multiple Choice
Pneumatic actuators are used to
convert linear to rotary energy
convert fluid to pneumatic energy
convert fluid to mechanical energy
convert pneumatic to electrical energy
- 23. Multiple Choice
A safety relief valve is used to
prevent air from flowing in a reverse direction
avoid excessive pressure build up
control the pressure regulator
drain dirty water from an air receiver
- 24. Multiple Choice
Compressors usually pump air into
pneumatic motors
pneumatic cylinders
receivers
atmosphere
- 25. Multiple Choice
What is SCFM?
Single acting cylinder force motion
Volume unit
Air flow rate unit
Pressure unit
- 26. Multiple Choice
Air compressors are used to
convert mechanical to pneumatic energy
convert pneumatic to electrical energy
lubricate service air lines
read air line pressure
- 27. Multiple Choice
Air lines are usually lubricated to
avoid increasing pressure too much
create minimal air line flow
reduce internal leaks and wear
transport air contaminants and dirt
- 28. Multiple Choice
Which of the following convert fluid energy into linear mechanical motion?
Air bearing
Pneumatic motor
Pneumatic cylinder
Air valve
- 29. Multiple Choice
The fluid power devices that convert the energy of a pressurized fluid into mechanical energy to do work are called
activators
actuators
accumulators
converters
- 30. Multiple Choice
What does the following symbol represent?
Hydraulic pump motor
Pneumatic pump
Pneumatic motor
Electric motor
- 31. Multiple Choice
What does the following symbol represent?
Single acting cylinder spring return
Double acting cylinder spring return
Single acting cylinder
Double acting cylinder
- 32. Multiple Choice
What does the following symbol represent?
Pressure gage
Thermometer
Flow meter
Air bearing
- 33. Multiple Choice
What does the following symbol represent?
4 way 3 position directional control valve
8 way 3 position directional control valve
4 way 3 position with center stop directional control valve
2 way 2 position directional control valve
- 34. Multiple Choice
According to the relationship between force, pressure and area, the force may be calculated using the formula
F=P/A
F=P x A
F=P2 x A
F=A/P
- 35. Multiple Choice
Fluid pressure gauges commonly measure pressure
above atmospheric pressure
below atmospheric pressure
at atmospheric pressure
below absolute pressure
- 36. Multiple Choice
Pressure is a measurement of
weight
force per unit of surface area
flow per unit of time
force per unit of time
- 37. Multiple Choice
The pressure at sea level is called
sea level pressure
absolute pressure
atmospheric pressure
reference pressure
- 38. Multiple Choice
The annular area of a cylinder corresponds to
the face area plus the rod area
the rod area minus the face area
the face area minus the rod area
the rod area plus the face area
- 39. Multiple Choice
The relationship between pressure and volume is known as
Pascal's law
Boyle's law
Gas law
Pneumatic's law
- 40. Multiple Choice
Absolute pressure refers to
the pressure measured by a pressure gauge plus the pressure exerted by atmosphere
the pressure measured by a pressure gauge minus the pressure exerted by atmosphere
the highest pressure that a component can withstand
the pressure measured by a Bourdon tube pressure gauge
- 41. Multiple Choice
When the air temperature in a receiver doubles,
the volume will double
the volume will decrease by half
the pressure will double
the pressure will decrease by half
- 42. Multiple Choice
When the temperature remains constant, the relationship between pressure and volume can be expressed by
P2 = V2 / (P1 X V1)
P2 = (P1 X V1) / T2
P2 = (P1 X T1) / V2
P2 = (P1 X V1) / V2
- 43. Multiple Choice
Which of the following is true, assuming that temperature remains constant?
If the volume of a gas doubles, the gauge pressure will decrease by half.
Gauge pressure must be converted to absolute pressure to use Boyle's law
If the gauge pressure of a gas doubles, the volume must have been decreased by half
The pressure of a liquid will remain the same when the volume of the liquid is compressed to half its original volume
- 44. Multiple Choice
A needle valve is used to
adjust the flow rate in a circuit
adjust pressure downstream from the valve
control the direction of fluid flow
align the needle in an industrial pneumatic sewing operation
- 45. Multiple Choice
Which components are combined within a pneumatic flow control vlave?
A relief valve and a needle valve
A needle valve and a check valve
A check valve and a regulator
A regulator and a needle valve
- 46. Multiple Choice
A needle valve consists of a valve body containing
two ports, a spring and a spool
two ports, needle and seat, and a threaded needle stem
three ports, a spring and a ball
one port, a needle and seat, and a spring
- 47. Multiple Choice
The flow through a control valve will increase if either the size of the orifice is increased or
If the size of the orifice remains constant but the pressure drop is increased by raising the upstream pressure.
If the size of the orifice remains constant but the pressure drop is decreased by lowering the upstream pressure
If the size of the orifice remains constant but the pressure drop is increased by lowering the upstream pressure
If the size of the orifice remains constant but the pressure drop is decreased by raising the upstream pressure
- 48. Multiple Choice
The major difference between a simple needle valve and a flow control valve involves
the size of the valve
the construction method
the number of ports
the direction of metered flow
- 49. Multiple Choice
The amount of lifting force generated by an air bearing is determined by
the surface area of an air bearing and the applied pressure
the weight of the object
the height of the air pocket between the bearing and smooth work surface
compressor size
- 50. Multiple Choice
Why do we use mercury instead of water in barometers?
The mercury is more stable
Because of the viscosity of the mercury, it will not leak like water
The mercury will not evaporate like water
Because of the weight of the mercury
- 51. Multiple Choice
The basic function of an air bearing is to
Lower the pressure in a branch circuit
cause a pneumatic motor to develop more torque
allow a pneumatic cylinder to suspend a load
reduce friction between two surfaces
- 52. Multiple Choice
Vacuum cannot do the same amount of work as high pressure compressed air. Why?
The cavuum generator would be enormous
The pressure differential between vacuum and atmospheric pressure is only 760 mmHg (or 14.7)
To do the same of amount of work, tubes would be large and expensive
Vacuum pumps are much more expensive then compressors
- 53. Multiple Choice
What single word describes a partial or complete absence of atmospheric pressure?
Volume
Force
Barometric
Vacuum
- 54. Multiple Choice
Pascal's law states that pressure applied on a confined fluid is transmitted undiminished in all directions, and acts with equal
pressure on equal areas and at right angles to them
flow on equal areas and at right angles to them
force on equal areas and at right angles to them
pressure and force on equal areas and at right angles to them
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