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Galactic transient black hole candidate (BHC) MAXI J1535-571 was discoveredon 2017 September 02 simultaneously by {\it MAXI}/GSC and {\it Swift}/BATinstruments. It has also been observed by India's first multi-wavelengthastronomy-mission satellite {\it AstroSat}, during the rising phase of its2017-18 outburst. We make both the spectral and the temporal analysis of thesource during 2017 September 12-17 using data of {\it AstroSat}'s Large AreaX-ray Proportional Counter (LAXPC) in the energy range of $3-40$~keV to inferthe accretion flow properties of the source. Spectral analysis is done with thephysical two-component advective flow (TCAF) solution-based {\it fits} file.From the nature of the variation of the TCAF model fitted physical flowparameters, we conclude and confirm that the source was in the intermediatespectral state during our analysis period. We observe sharp type-Cquasi-periodic oscillations (QPOs) in the frequency range of $\sim1.75-2.81$~Hz. For a better understanding of the nature and evolution of thesetype-C QPOs, a dynamic study of the power density spectra is done. We alsoinvestigate the origin of these QPOs from the shock oscillation model. We findthat non-satisfaction of Rankine-Hugoniot conditions for non-dissipative shocksand not their resonance oscillations is the cause of the observed type-C QPOs.

AstroSat Observation of Non-Resonant Type-C QPOs in MAXI J1535-571