What happens to the air once it's been processed by the dryers?
- It goes through a one-way check valve, and then goes to the first reservoir ✓
- It's re-circulated through the system
- It's condensed and stored for future use
- It's released into the atmosphere
Answer: A. It goes through a one-way check valve, and then goes to the first reservoir
After the dryers clean the air, it passes through an internal one-way check valve and then goes to the first reservoir.
Why this is the answer
The handbook puts the air dryer in the compressor discharge line, between the compressor and the first reservoir. Inside, the warm moist air cools so some water vapour condenses, then it moves through a filter that takes out oil and another that takes out remaining water vapour. The clean air then passes an internal one-way check valve on its way to the first reservoir. So the dryer is a cleaning stop on the way to that first tank, not the end of the line.
Why the other answers are wrong
- B. It's re-circulated through the system — The passage describes the air moving from the compressor through the dryer and on to the first reservoir, not being sent back around the system again.
- C. It's condensed and stored for future use — What condenses inside the dryer is water vapour on cool metal surfaces, not the air itself, and the passage says nothing about storing air there for later.
- D. It's released into the atmosphere — The cleaned air is delivered onward to the first reservoir, and the handbook does not say the dryer dumps the air out into the atmosphere.
Remember it
Picture the flow: compressor, dryer, filters, check valve, first reservoir. Clean air leaves the dryer heading forward, never backward.