  Following the successful prediction of an exact value for the fine structure
constant later confirmed to differ numerically from the centre value of the
latest experimental recommended CODATA range by 10^{-12}, further analysis and
predictions of exact values for two other quantum coupling constants, the
strong and the electroweak, are given. The method employed to obtain these
theoretical values depends on the conjecture that measured values of a
fundamental set of quantum coupling constants approximate to exact values that
can be found in a specific set C_Q of numerical values which has a countable
number of elements. The letter C and its subscript Q stand for coupling and
quantum respectively. A full definition of this set are given in the body of
this paper. Questions of how this conjecture might be validated from the
theoretical and measurement point of view and the identification of those
elements of C_Q which have values of definite physical significance constitute
the subject matter of this paper.
