A stationary engineer starts and stops a low-pressure chiller, records its gauge readings and adjusts its water temperature setpoint, but never connects to the refrigerant circuit. What does the certification requirement mean for that person?
Correct Answer
C) No certification is required, because the work cannot be expected to release refrigerant
The certification requirement is aimed at people who perform maintenance, service or repair that could reasonably be expected to release refrigerant. Starting a machine, reading gauges and changing a setpoint releases nothing. The moment that same engineer connects a hose, changes a drier, adds refrigerant or opens the circuit, certification is required. Many plants certify their operators anyway, but operating alone does not trigger the rule.
Why This Is the Correct Answer
The rule follows the possibility of a release. Operating a machine from its control panel and logging readings does not open the refrigerant circuit and cannot release refrigerant, so no certification is required for that work. Certification becomes necessary as soon as the person begins service that could release refrigerant.
Why the Other Options Are Wrong
Option A: Type III certification is required, because the person is operating a low-pressure appliance
Operating an appliance is not service on it. The requirement attaches to work that could release refrigerant.
Option B: Universal certification is required, because plant operators work on more than one machine
Universal certification simply covers all three appliance classes. Working around several machines does not by itself require any certification.
Option D: Type II certification is required, because gauge readings involve the high pressure side
Reading a gauge releases nothing, and the certification type follows the appliance rather than which side of the machine a reading comes from.
Memory Technique
Turning a knob is operating. Turning a wrench on the circuit is servicing.
Reference Hint
Technician certification is required for maintenance, service or repair that could reasonably be expected to release refrigerant.
More epa-608-type-3 Questions
Some jobs on a chiller count as a major repair under the refrigerant rules, which changes what a technician is allowed to do with a badly leaking machine. Which job falls into that category?
An owner asks how many pounds of refrigerant the rules allow to be left inside a chiller once the recovery has been signed off. What is the correct answer to give him?
The motor of a hermetic centrifugal chiller sits inside the pressure boundary rather than outside it on a shaft. What follows from that construction?
An oxygen monitor is used to decide whether a chiller machine room is safe to enter after a refrigerant release. Below what oxygen reading is the atmosphere treated as oxygen deficient?
A low-pressure chiller's rupture disc has a discharge line running from it. Where does that line have to terminate?
A refrigerant vapor detector in a chiller machine room reaches its alarm level. Besides sounding, what is that alarm expected to do?
Which piece of equipment requires a technician to hold Type III certification before it may be serviced?
What property of the refrigerant is what actually places an appliance into the low-pressure category?
During normal operation, what condition exists inside the evaporator of a running low-pressure centrifugal chiller?
In what unit is the required final recovery vacuum for a low-pressure appliance normally expressed?
People Also Study
Business & Financial Management
120 questions · 70% to pass
Contract Administration
60 questions · 70% to pass
Project Management
60 questions · 70% to pass
Related Study Resources
Previous Question
Why must the pressure used to leak test a low-pressure appliance be kept to a very low ceiling?
Next Question
The purge unit on an R-123 chiller has failed and its compressor has to be replaced. What has to happen to the refrigerant sitting inside that purge unit before it is opened up?