Let’s all answer question 46: Basic knowledge of mechanical equipment-related fields

Thread Content

This post was last edited by zx9527007 on 2009-9-3 00:12. This event is organized to help all Haichuan members review their mechanical theory knowledge; we hope everyone will participate actively! True or False: 1. The basic components of a machine are mechanical parts. 2. Pearlite is an eutectic compound of martensite and cementite formed as a result of the eutectoid transformation of austenite (austenite being a interstitial solid solution of carbon in γ-Fe). 3. A gear pump is mainly composed of an oval-shaped pump casing and two gears. One of the gears is the driving gear, driven by the transmission mechanism, while the other is the driven gear, which meshes with the driving gear and rotates in the same direction. 4. The machining capabilities of the lathe include: external turning, boring, taper shaping, grooving, T-slot formation, cutting, surface shaping, end face processing, threading, center hole drilling, drilling, reaming, tapping, knurling, etc. 5. Mechanical seals are classified as balanced or unbalanced based on the pressure in the sealing chamber. 6. A flame arrester, also known as a fire arrestor, is a safety device used to prevent the spread of flames from flammable gases and liquid vapors. It is primarily made of non-combustible solid materials that contain numerous small, uniform or irregular channels or pores through which gases can pass. The inner diameter of various flame arresters and the height of their housings are determined based on the diameter of the pipeline. The inner diameter of a flame arrester is usually set to 4 times the diameter of the pipeline to which it is connected. 7. After the installation or maintenance of liquefied gas and gas facilities and pipelines is completed, pressure tests using water and gas must be carried out in accordance with regulations, and a certain holding time is required to ensure no leaks, no significant deformation, and uniform expansion. 8. The basic failure modes of rolling bearings include wear failure, fatigue failure, corrosion failure, etc. 9. The flue gas temperature at the outlet of the convection chamber in a tubular heating furnace is generally between 300-450°C; an air preheater can be installed to recover the remaining heat. 10. The purpose of making an opening in the rear cover plate of a single-stage centrifugal pump is to balance the axial force. Answers for issue 46: √×××× √×√√√. When replying, please choose hidden mode; see the instructions for hiding. Note: Be careful when posting – edits are invalid ； Answers from the same IP are accepted, but only the first post is valid. If answers from the same IP are found to be similar, strict action will be taken. Everyone is welcome to continue to participate actively. If you have any questions or suggestions, please post them in the feedback thread. Starting from issue 17, those who answer all questions correctly will be able to claim their prizes; only those who answer everything correctly can receive the prizes