"Hydraulic and pneumatic" homework one: a, multiple-choice questions 1, the hydraulic system, the hydraulic cylinder belongs to (), the hydraulic pump belongs to ().
A, power part B, the implementation part C, the control part 2, the following hydraulic components, () belongs to the control part, () belongs to the auxiliary part.
A, tank B, hydraulic motor C, check valve 3, () is used to control the flow of oil.
A, check valve B, filter C, manual piston pump 4, the hydraulic system, the input hydraulic energy is converted to mechanical energy components ().
A, check valve B, hydraulic cylinder C, manual piston pump 5, the hydraulic system, the hydraulic pump is the motor output () into the oil ().
A, mechanical B, C, pressure 6, compared with mechanical transmission, electrical transmission, hydraulic drive () A, not easy to achieve stepless speed regulation B, the maintenance of system failure C, the transmission is not stable enough 7, in the hydraulic jack , () Belongs to the hydraulic system control part.
A, put the oil valve B, manual piston valve C, tank two, short answer questions 1.
Hydraulic and pneumatic drive system which is composed of several parts?
What is the role of each part?
2. What are the advantages and disadvantages of hydraulic transmission?
3.
What are the advantages and disadvantages of pneumatic transmission?
Job 2: First, multiple-choice questions 1, the pressure generated by the weight of the fluid in the hydraulic drive ().
A, must consider B, consider the load is large C, generally negligible 2, hydraulic system and components under normal operating conditions, according to experimental standards for continuous operation () is called the rated pressure.
A, the average working pressure B, the maximum working pressure C, the minimum working pressure 3, the hydraulic cylinder, the piston speed () the average velocity of the hydraulic cylinder fluid.
A, greater than B, equal to C, less than 4, in the absence of branch pipeline, the oil for steady flow, the flow through the different sections of the pipeline when the average velocity and its cross-sectional area () relationship.
A, inversely proportional to B, is proportional to C, not 5, in the absence of branch pipeline, the oil for steady flow, the average flow rate of thin pipe () the average flow rate of crude pipe.
A, less than B, equal to C, greater than 6, static oil, at any point by the pressure in all directions are ().
A, not equal B, equal C, uncertain 7, the flow of liquid in the pipeline, the pressure loss, the relationship between flow and liquid resistance is: increased liquid pressure, pressure loss (), flow rate ().