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What is the principle of conveyor belting?

A conveyor belt is an assembly of a belt rotating around two pulleys. Either one or both of the pulleys of the conveyor belt system are powered to rotate; when they rotate, the belt moves as well, transporting the materials on the belt from one place to another.


What is a unirotating propeller?

A uni-rotating propeller is one that can go around in both directions. This type of propeller typically will do different things depending on which direction it is going.


What is a spectacle blind in a piping system and what is it for?

The whole idea of a spectacle blind is so that one can be absolutely sure that an item of equipment is properly and securely blanked off with no possibility of any flow or leakage through a valve during maintenance. The flow can be diverted to other items of equipment but not just bypassed around the blank as this would compromise the safety function of the spectacle blind. The flow has to valved off and pressure relieved prior to loosening flange bolts and swinging the blind.


What dimensions are shown for around duct on HVAC system drawings?

On HVAC system drawings, the dimensions for around ducts typically include the width, height, and sometimes the length of the duct. Additionally, dimensions for clearance around the duct are often specified to ensure proper airflow and maintenance access. These drawings may also indicate any necessary offsets or transitions to connect with other ductwork or equipment. Overall, the dimensions ensure the system fits within the designated space while maintaining efficiency and safety.


What is revolve in autocad?

In AutoCAD, the "Revolve" command is used to create a three-dimensional object by rotating a 2D profile around a specified axis. This technique is particularly useful for generating symmetrical shapes, such as cylinders or cones, by defining a closed shape and selecting the axis of revolution. Users can specify the angle of revolution, allowing for the creation of partial or full 3D objects. Overall, it is a powerful tool for enhancing 3D modeling capabilities within the software.