[Nevada (NV) Refrigeration and Air Conditioning Contractor (C21) Exam Success Course] The Nevada (NV) Refrigeration and Air Conditioning Contractor (C21) Practice Course is tailored for individuals seeking certification as refrigeration and air conditioning contractors. This course covers essential topics such as system design, installation, and maintenance for refrigeration and air conditioning systems. Participants will study areas including refrigeration principles, air conditioning technologies, and safety regulations. The curriculum includes practical exercises, technical case studies, and sample exam questions to enhance candidates' skills and understanding. By focusing on industry standards and best practices, this course ensures that aspiring contractors are well-prepared for the C21 certification exam and capable of delivering high-quality refrigeration and air conditioning services.