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Listening Quiz: Chọn Đúng Loại Vòng Đệm Cho Hệ Thống Thủy Lực Áp Suất Cao – Advanced Level
Th3 2, 2024
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bởi
Anna Phạm
trong
Tiếng Anh dành cho Kỹ sư cơ khí (English for Mechanical Engineer)
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1.
What are John and Jessica mainly discussing?
Installing a pump for a cooling system
Choosing a suitable seal for a high-pressure hydraulic system
Replacing hydraulic fluid in a machine
How to repair a leaking pipe in a factory
Explanation:
The conversation is mainly about selecting the right seal for a hydraulic system operating under high pressure and high temperature.
2.
What pressure and temperature will the system operate at?
2000 psi and 100 degrees Celsius
4000 psi and 150 degrees Celsius
4500 psi and 120 degrees Celsius
3000 psi and 180 degrees Celsius
Explanation:
John says the system will operate at 4000 psi and 150 degrees Celsius.
3.
Which materials does Jessica recommend for the seal?
PTFE or Viton
Copper or steel
Silicone or aluminum
Rubber or nylon
Explanation:
Jessica says, ‘We should use a seal made from PTFE or Viton.’
4.
Why does Jessica suggest using a backup ring with the seal?
To make the seal easier to remove later
To increase the fluid’s temperature
To change the seal’s material
To reduce extrusion problems
Explanation:
Jessica says thermal expansion and extrusion are common problems and recommends a backup ring to reduce extrusion.
5.
What should the seal be compatible with?
The hydraulic fluid
The operator’s gloves
The room’s humidity
The machine’s color
Explanation:
Jessica says the seal must be compatible with the hydraulic fluid.
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