  We used the standard geometrical thin accretion theory to obtain the
accretion rates in Seyfert 1 galaxies and quasars. Combining accretion rates
with the bolometric luminosity, we obtained the accretion efficiency. We found
most of Seyfert 1 galaxies and radio quiet quasars have lower accretion
efficiencies while most of the radio loud quasars possess higher accretion
efficiencies. This finding further implies most of radio loud quasars possess
Kerr black holes while Seyfert 1 galaxies and radio quiet quasars may not
possess Kerr black holes. Considering the difference of the accretion
efficiency we found there is a strong correlation between the accretion rate in
units of the Eddington accretion rate and the width of the H$\beta$ emission
line and most of AGNs are not accreting at Super-Eddington rates.
