RRB NTPC RRC Group D Exam 2020: Railway Recruitment Board issues guidelines for candidates, details here Chairman of RRB Allahabad said that the exam centre will be sanitized before the exams are held and a distance of 6 feet will be kept between seats. RRB NTPC RRC Group D Exam 2020 (File Photo) Share Updated: Dec 11, 2020, 05:26 PM IST RRB NTPC Admit Card 2020: The Railway Recruitment Board has issued guidelines for railway recruitment exam starting from December 15, 2020. Candidates have been asked to wear simple masks at the exam centre instead of the designer ones. Those with designer masks, towels or handkerchiefs used as masks won't be allowed inside the exam hall.