  The potential formation of the quasi-single-helicity (QSH) state in the Keda
Torus eXperiment (KTX) is investigated in resistive MHD simulations using the
NIMROD code. We focus on the effects of finite resistivity on the mode
structure and characteristics of the dominant linear and nonlinear resistive
tearing-mode in a finite $\beta$, cylindrical configuration of reversed field
pinch model for KTX. In the typical resistive regimes of KTX where Lundquist
number $S=5 \times 10^4$, the plasma transitions to a steady QSH state after
evolving through an initial transient phase with multiple helicities. The
dominant mode of the QSH state develops from the dominant linear tearing mode
instability. In lower $\beta$ regime, the QSH state are intermittent and short
in duration; in higher $\beta$ regime, the QSH state persists for a longer time
and should be more observable in experiment.
