209.03-209.04 Flashcards
Startup of an Air Compressor
Check Oil Level: Ensure the oil level is adequate if your compressor is oil-lubricated.
Inspect for Damage: Look for any visible damage or loose parts.
Connect to Power: Plug in the compressor to a suitable power source.
Open Valves: Make sure the air outlet valve is open.
Turn On: Switch on the compressor using the power button or switch.
Monitor Gauges: Watch the pressure gauge to ensure it reaches the desired pressure.
Normal Shutdown of an Air Compressor
Turn Off: Use the power button or switch to turn off the compressor.
Release Pressure: Open the drain valve to release any built-up pressure in the tank.
Unplug: Disconnect the power source.
Close Valves: Ensure all valves are closed after use.
How do you Adjust air compressor pressure switch
Locate the Pressure Switch: This is usually a small box on the compressor with a cover.
Turn Off Power: Ensure the compressor is off and unplugged.
Remove Cover: Carefully remove the cover of the pressure switch.
Adjust Settings: Use a screwdriver to adjust the cut-in and cut-out pressure settings. Turn clockwise to increase pressure and counterclockwise to decrease.
Replace Cover: Once adjusted, replace the cover securely.
How do you Drain an air compressor
Turn Off and Unplug: Ensure the compressor is off and unplugged.
Release Pressure: Open the drain valve at the bottom of the tank to release air and moisture.
Close Valve: Once drained, close the valve tightly.
Describe how compressed air is generated
Compressed air is generated by reducing the volume of air, which increases its pressure. This is typically done using air compressors. Compressed air is used in various applications, such as powering tools, inflating tires, and in industrial processes.
Describe compressed air characteristics
High Pressure: Compressed air is stored at a higher pressure than atmospheric air.
Energy Storage: It can store energy for later use.
Clean and Safe: It’s non-toxic and can be used in environments where electricity might be hazardous.
Describe the operation of a reciprocating air compressor
A reciprocating air compressor uses pistons driven by a crankshaft to compress air.
Intake Stroke: The piston moves down, drawing air into the cylinder.
Compression Stroke: The piston moves up, compressing the air.
Discharge Stroke: Compressed air is pushed out of the cylinder.
Describe the components of a reciprocating air compressor
Cylinder: Houses the piston.
Piston: Moves up and down to compress air.
Crankshaft: Converts rotational motion into the piston’s linear motion.
Valves: Allow air to enter and exit the cylinder.
Describe how air compressor flow capacity is measured
Flow Capacity: This is typically measured in cubic feet per minute (CFM). It indicates the volume of air the compressor can deliver at a specific pressure.
Measurement: To measure flow capacity, you need to know the pressure at which the compressor operates, as the flow rate can change with different pressures.
Define absolute pressure measurement
This is the total pressure measured from absolute zero, which is a perfect vacuum. It’s often measured in units like pounds per square inch absolute (psia) or pascals (Pa).
Define gage units of pressure measurement
This measures pressure relative to atmospheric pressure. It’s what most pressure gauges show and is measured in units like pounds per square inch gauge (psig). Gauge pressure can be converted to absolute pressure by adding atmospheric pressure (about 14.7 psi at sea level).
Define the combined gas law
The combined gas law combines Charles’s Law, Boyle’s Law, and Gay-Lussac’s Law. It shows the relationship between pressure, volume, and temperature for a fixed amount of gas.
Explain the combined gas law mportance
This law is crucial because it allows us to predict how a gas will behave when conditions change. It’s used in various applications, from understanding weather patterns to designing engines and refrigerators.
The combined gas law formula
=
T
2
P
2
×V
2
, where
P
P is pressure,
V
V is volume, and
T
T is temperature in Kelvin.
Describe the guidelines for drawing pneumatic schematics
Standard Symbols: Use standard symbols for components like valves, actuators, compressors, and filters. This helps others understand the schematic easily.
Flow Direction: Clearly indicate the direction of airflow using arrows. This shows how the air moves through the system.
Component Labels: Label each component with a unique identifier or name. This makes it easier to reference specific parts of the system.
Connections: Show all connections between components clearly. Use lines to represent hoses or pipes, and ensure they are not crossing in a confusing way.
Layout: Arrange components logically, often from left to right or top to bottom, to represent the sequence of operations.
Scale and Proportion: Keep the scale and proportion consistent to avoid misinterpretation of the schematic.
Notes and Annotations: Include any necessary notes or annotations to explain complex parts of the system or special conditions.
