Metallurgical Principles and Practice of Engineering (PE) Study Guide: Question #9

It Is the Policy of The Minerals, Metals & Materials Society (TMS) to Encourage the Professional Registration of Metallurgical Engineers.
An integrated steel maker produces carbon steel plate for industry. The plate is made in a mill at a rate of 450 tons/hr and sent to a laminar flow water cooling system to reduce the steel temperature from 1725°F to 400°F in a controlled manner. The plate can be considered to be infinite in length and width and is 2" thick. Cooling water is available for cooling at 95°F and returns to a cooling tower at 130°F

Other information includes:

Steel thermal conductivity, k = 20.2 BTU/(hr.ft.F^O)
Steel heat capacity, C_p = 0.12 BTU/(lb.F^O)
Steel density, r = 0.283 lb/in³

The steam enthalpy is 1005 BTU/lb. How much water (gal/min) is evaporated in the cooling tower to remove 185 million BTU/hr?

(A)	370
(B)	3,070
(C)	22,000
(D)	184,000

The information on this page is maintained by the Nellie Luther (natale@tms.org).

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