The questionnaire should measure expectations/obligations of the employer and employer as well as breach/violation of the psychological contract. It can be from various studies.
***Freese, C., & Schalk, R. (2008). How to measure the psychological contract? A critical criteria-based review of measures. South African Journal of Psychology, 38(2), 269-286.
-and a suggestion, based on my research, is PCI, a measure obligations-based (Rousseau, 2000). "The PCI contains both content and evaluation (breach) measures. First, it assesses a variety of specific terms (e.g., “to train me only for my particular job”, “ opportunities for promotion”) that can arise in employment. It then assess the extent to which the respondent believes that he or she has fulfilled commitments made to the employer and whether that employer has fulfilled its commitments in turn."
***Rousseau, D. M. (2000). Psychological contract inventory technical report. Pittsburgh: Carnegie Mellon University.
-since PCI do not assess ideological content (just transactional, relational and balanced), you can give a look to Bingham´s (2006) measure:
***Bingham, J. B. (2006). Multiple obligations: Distinguishing the dimensionality and confirming the role of ideology within the psychological contract framework (Doctoral dissertation, Texas A&M University).