Contains the main questions of the theoretical part of the course "Hydraulics" . The principle of operation and calculated dependences of hydraulic machines and hydraulic apparatus are given. The issues of regulation, stabilization and synchronization of the speed of hydraulic motors, sealing of hydraulic devices and air conditioning of the working fluid are considered. Hydraulic tracking actuators are described, including hydrodynamic (jet) hydraulic amplifiers. Issues of theory of structural types of hydrodynamic drive are considered. The work of hydraulic coupling and hydraulic transformer with drive engines is described. General information on the use of gases in technology, the features of the pneumatic drive and the regularity of air flow. Describes the issues of compressed air preparation, design and the principle of operation of pneumatic machines and devices. ;Griff:Recommended by the Educational and Methodological Commission of specialty 130400. 65 “Mining” as an e-learning aid