A student pass is required and issued by the Singapore Immigration and check point authority for your studies in Singapore. Upon receiving your offer of admission to NTU, you will be given instructions on how to complete your student pass application. Once the application is approved, you will be issued an IPA letter which is a single entry visa to Singapore and will then work with Nanyang to obtain a Student Pass which will allow for multiple entries to Singapore.
More information regarding the student pass can be found here.
NOTE: Visa application rules change frequently and the university cannot control visa acceptance. You are responsible for applying for and providing the proper documentation to the consulate or embassy.