CFC gas
Mannitol
With driveshaft removed check the universal joints for play or binding.
This is due to the static and dynamic pressure acting on the water.As water flows down Kinetic energy is translated to pressure energy and hence pressure increases during hydrotesting...
Substantive procedures performed by the auditor during the substantive testing stage of the audit that gather evidence as to the completeness, validity and/or accuracy of account balances and underlying classes of transactions.
Inspection, auscultation, palpation, percussion, reflexes, range of motion and strength testing, evaluation of hearing and vision, sometimes bloodwork.
A plane is pressurized to ensure that a good supply of oxygen is in the cabin. At 32,000-36,000 feet the oxygen levels are low. It also allows the cabin to stay warm. Without pressure you would pass out from hypoxia.
There are 2 types of testing. Acceptance and Service. Acceptance testing is done by the manufacturer before it is shipped. Service testing is performed by the user periodically. Once a year. Service testing is for "in-service" hose to make sure it is maintained in optimum condition. Confirms that the hose is able to function at maximum pressure during firefighting operations. Guidelines are listed in NFPA 1962.
There could be a number of reasons, and those could be narrowed down a bit if you had included the actual pressure it was running (along with the high side pressure), as well as the ambient air temperature during testing. Possible causes may include excessive refrigerant and/or oil, a low pressure switch failure which causes the compressor to run constantly, and blockage on the low side. Incorrect testing methods are also a possibility.
This welder is certified to weld on pressure vessels. Testing is done on the weld either by X-Ray or pressure test. The root pass is inspected then the final pass is inspected during the test. If either inspection turns up a flaw, the test is over and you fail.
Standard Operating Procedures
I like to have a fish dinner the night before a big test. Eating during testing would only be a distraction.
Pressure in aorta is greatest during ventricular systole.