| In a refigeration system, once the gage manifold hoses are attached to the compressor service valve connections and properly purged, what should be the status of the manifold valves and the service valves when the purpose for attachment is to read system pressures? |
| A) both manifold hand valves should be open and the compressor service valves should both be front-seated |
| B) both manifold hand valves should be open and the compressor service valves should both be back-seated |
| C) both manifold hand valves should be closed and the compressor service valves should be cracked-off their back seats |
| D) both manifold hand valves should be open and the compressor service valves should be cracked-off their back seats |
