16 Questions
What is the purpose of the start and stop control method in a compressor system?
To shut down the compressor when little or no air is required
Why is it important to have a sufficiently large receiver in the start and stop control method?
To avoid continuous starting and stopping of the compressor
What is the role of the unloader in a compressor system?
To load and unload the compressor based on speed
Which type of control method is specifically mentioned as being used only for electric motor driven units?
Start and stop control
How does the unloader valve operate in a compressor system?
It opens when the compressor stops and closes when it starts operating
Why should the compressor be automatically unloaded during startup?
To avoid overloading the motor
What is the purpose of the unloader valve in a reciprocating compressor system?
To reduce pressure in the discharge pipe when the compressor stops
In which situation would a pilot type unloader vary the output from the compressor according to air demand?
When the compressor is very large
What is the purpose of holding the inlet valves open in a compressor with load/unload control?
To allow air to pass freely without gaining compression
Which type of control method allows for adjusting compressor speed by varying the motor speed, regulating steam supply, or regulating fuel supply?
Variable Speed Control
When does a compressor with dual capacity control shut down?
After running at full load for a specific time
What is the function of protective controls in a compressor system?
To prevent damage or catastrophic failure
In load/unload control, what happens to the inlet valve when the compressor is unloaded?
It opens fully allowing free flow of air
How does a variable speed control method respond to an increased demand for air?
By increasing compressor speed
What does an inlet valve unloader do when a compressor is loaded?
It remains closed.
Why is a pilot type unloader used in compressors that are very large?
To vary output based on air demand.
Learn about the various methods used to control the output of a compressor to meet load requirements and maintain constant pressure. Explore start and stop control, load/unload control, dual control, variable speed control, and constant speed control.
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