An air-cooled refrigerated container unit using R-134a as a refrigerant has a box temperature set point of 32°F, but it is currently operating with a stable supply air temperature of 35°F. The fresh air makeup vent is closed, the unit is operating at 460 VAC/60 Hz, and the unit is in full capacity cool (modulating valve 100% open). Using the illustrated troubleshooting guide, what would be the normal range of expected discharge pressures if the ambient air temperature is 90°F? See illustration GS-RA-52.

Study on the go
Take your USCG credential exam practice questions offline with the mobile app.
Download AppRelated Questions
Under the federal regulations of 33CFR Subchapter O, if a vessel equipped with a...
View questionWhen preparing/writing shipyard items for your vessel's upcoming dry-docking per...
View questionPrior to entering the navigable waters of the United States after an internation...
View questionPrior to entering the navigable waters of the United States after an internation...
View questionYou are conducting an operational test of your main steering gear system. The ma...
View questionDuring the Special Survey the propeller is removed and shaft pulled into the ves...
View questionIn accordance with the international MARPOL Annex VI regulations, what is the mi...
View questionIn accordance with the international MARPOL Annex VI regulations, which of the l...
View questionIn accordance with 46 CFR Subchapter I (Cargo and Miscellaneous Vessels), it is...
View questionWhat type of maintenance system would be associated with manufacturer recommenda...
View question