The aim of this research is to investigate the reflections on operational chemistry and physics problems solving critical thinking dispositions of engineering faculty students. This research is designed as relational scanning model. The sample of this study, Chemistry, Chemical Engineering, Electrical-Electronics Engineering last year students taking "General Chemistry" and "General Physics" course has formed. In the study; The California Critical Thinking Disposition Inventory (CCTDI-R), which is improved by Facione, Facione and Giancarlo (1998) and adapted to Turkish by Kokdemir (2003). and "Mathematics usage scale in Operational Chemistry and Physics Problems" (MUSOPCP) with two factors which is developed by Ozsoy-Gunes, Derelioglu, Kirbaslar (2011) are used as tool of data collection. In order to analyze the data, SPSS 16.00, ANOVA, independent T-Test, Pearson correlation coefficient techniques are used. As a result, between CCTDI-R scale with mathematics anxiety in chemistry and physics problems factor of MUSOPCP has a negative relation and with mathematics knowledge factor of MUSOPCP has a positive relation. The significant differences were found between the departments with mathematics anxiety factor score of MUSOPCP and between the gender with mathematics knowledge factor score of MUSOPCP. The significant differences weren't found between gender and department with CCTDI-R scale; but according to graduated secondary school, significant differences were found between with CCTDI-R scale. (C) 2015 The Authors. Published by Elsevier Ltd.