  We argue that a superconducting state with a Fermi-surface of Bogoliubov
quasiparticles, a Bogoliubov Fermi-surface (BG-FS), can be identified by the
dependence of physical quantities on disorder. In particular, we show that a
linear dependence of the residual density of states at weak disorder
distinguishes a BG-FS state from other nodal superconducting states. We further
demonstrate the stability of supercurrent against impurities and a
characteristic Drude-like behavior of the optical conductivity. Our results can
be directly applied to electron irradiation experiments on candidate materials
of BG-FSs, including Sr$_2$RuO$_4$, FeSe$_{1-x}$S$_x$, and UBe$_{13}$.
