Question

The following statements about hydraulics and pneumatics are correct ( ).

A. When the throttle valve is opened, the oil entering the hydraulic cylinder will increase, and the speed of the workbench will be accelerated.

B. The fuel tank is an auxiliary device.

C. The hydraulic pump is an energy device that provides pressure oil to the system.

D. The hydraulic cylinder is an actuator that directly contacts the workpiece for work.

Answer 1

Answer: C. The hydraulic pump is an energy device that provides pressure oil to the system.

Analysis: The following statements about hydraulic and pneumatic technology are correct C, hydraulic pump is an energy device, providing pressure oil to the system.

A throttle valve is a valve that controls the flow of fluid, which reduces the flow of oil into the hydraulic cylinder, thereby controlling the speed at which the table moves. So option A is wrong.

The oil tank is an important part of the hydraulic system, it is not only an auxiliary device, but a place to store hydraulic oil, which can play a role in stabilizing the working pressure of the hydraulic system, reducing the gas and mechanical friction in the oil. Hence the B option is wrong.

The hydraulic cylinder is the actuator in the hydraulic system, which pushes the piston movement through the pressure of the oil, thereby driving the workpiece to do work. So the D option is wrong.

The hydraulic pump is an energy device in the hydraulic system, which compresses the oil through mechanical energy to make it have high pressure energy, and provides pressure oil to the system, thereby driving the hydraulic cylinder and other executive components to work. So the C option is correct.

Answer 2

Hydraulic and pneumatic technology is an indispensable means of power transmission and control in modern industry. 

It converts the pressure energy of liquid or gas into mechanical energy to achieve efficient and precise movement and adjustment of equipment. It is widely used in mechanical manufacturing, aerospace, automotive engineering, automated production lines and other fields. 

With its powerful power output, flexible transmission mode and good control performance, it promotes the development of intelligent and automated industrial production.