What type of antifreeze solutions may be used in ground loops?
What will be an ideal response?
Low tox
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The NEC has established ____ values for conduit and tubing.
a. quantity b. percent fill c. quantity fill d. total number
This problem concerns a compound for which the following information is available:
• The triple point is located at P=0.8 atm and T=300 K. • The critical point is located at P=40 atm and T=650 K. • The acentric factor is 0.25. • At atmospheric pressure, it boils at 314 K. • At atmospheric pressure, the molar volume is 0.12 L/mol for solid and 0.132 L/mol for liquid. • At atmospheric pressure, the enthalpy of fusion/melting is 400 J/mol. Give your best estimate of each of the following: A) The enthalpy of vaporization at the triple point. B) The vapor pressure at 305 K. C) The vapor pressure at 500 K. D) Estimate the melting point at atmospheric pressure.
A warped aluminum cylinder head can be restored to useful service by ________
A) Heating in an oven at 500°F with shims under each end, allowing it to cool, and then machining it B) Grinding the gasket surface and then align honing the camshaft bore C) Heating it to 500°F for 5 hours and cooling it rapidly before final machining D) Machining the gasket surface to one-half of the warped amount and then heating the head in an oven and allowing it to cool slowly
Attempts to improve quality and competitiveness include flexible manufacturing, CIM, JIT, ISO 9000, and SPC.
Answer the following statement true (T) or false (F)