CEM Practice Test 12

10 free CEM practice questions in the real exam format, covering the official content areas, with an explanation for every answer.

CEM Practice Test 12Tutor mode

Question 1 of 10

Boiler and Steam Systems

A chemical plant installs a flash tank and heat exchanger on its continuous surface blowdown. Using the data shown, what is the annual fuel cost savings?

Blowdown data
ItemValue
Blowdown flow1,200 lb/h, saturated water at 150 psig (hf = 338 Btu/lb)
Makeup water55 °F (h = 23 Btu/lb)
Share of blowdown heat recovered75%
Boiler efficiency80%
Operation8,000 h/yr
Natural gas$6.00/MMBtu