A plus sign after an examination date indicates that the cylinder:

a. may be retested in 5 years.
b. may be retested in 10 years.
c. has been sold to another company.
d. has complied with the requirements of the test.

ANS: D
The plus sign means that the cylinder has complied with the requirements of the test. An asterisk following the reexamination date on the cylinder markings indicates that the cylinder must be retested every 10 years.