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The  Union Public Service Commission conducts exam for Special Class Railway Apprentice (SCRA) program there are only 20 to 30 seats available. The UPSC SCRA examination comprises written tests in mathematics, physics, chemistry, English language, general knowledge, and a psychological test (mental ability). The selected candidates are called for an interview, which is followed by a medical examination. Full-Form of UPSC SCRA is Union Public Service Commission Special Class Railway Apprentices. Union Public Service Commission is a central level body which is a delegated authority for various recruitment exams for civil servants in India. The exam is conducted mainly for Railway service recruitment.