What is the temperature differential between water in and water out of a heat exchanger that has transferred 50,000 Btu/h? The flow rate is 10 gallons per minute.
A. 5°
B. 10°
C. 20°
D. 50°
Answer: B
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F/3.1 = 6. What is F?
A. 12.4 B. 14.2 C. 16.8 D. 18.6
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Spool valves are sometimes used as a fluid pressure control device.
Answer the following statement true (T) or false (F)
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All of the following statements are correct EXCEPT ________
A) Hydrodynamic lubrication often prevents metal to metal contact B) Viscosity of a lubricant affects its lubricating efficiency C) Hydrodynamic lubrication works best in an engine when the lubricated components are stationary D) Hydrodynamic lubrication uses a boundary film of oil for lubrication
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CAD/CAM is commonly used in modern manufacturing because it increases productivity over conventional manufacturing methods.
Answer the following statement true (T) or false (F)
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