The textbook is intended for performance of control works by students of correspondence education of IZDPO in the following directions: 110800. 62 Agroengineering (technological systems in agribusiness); 190600. 62 operation of transport and technological machines and complexes; 250300. 62 technology and equipment of logging and woodworking industries; 260100. 62 food products from vegetable raw materials; 260200. 62 food of animal origin; 260800. 62 technology of production and organization of catering; 270800. 62 - construction; 280100. 62 environmental management and water use in accordance with the requirements of the GEF VPO in the discipline “Electrical engineering and electronics” .