2015 First Aid Exam No. 4 Taken from the 2015 Missouri S&T First Aid Contest held in Rolla, Missouri Progress Indicator: Question 7 of 30 7.  Which type of containers are insulated, vacuum-jacketed tanks with safety-relief valves and rupture disks? p. 79 Choices: Noded spheroid tanks Cryogenic-liquid storage tanks Spheroid tanks Spherical pressure vessels