The main official responsible for evaluating or examining something, typically in an academic or professional setting.

मुख्य परीक्षक

English Usage: The chief examiner reviewed all the papers before the final results were announced.

Hindi Usage: मुख्य परीक्षक ने अंतिम परिणाम की घोषणा से पहले सभी पत्रों की समीक्षा की।