CEM Practice Test 2

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

CEM Practice Test 2Tutor mode

Question 1 of 10

Boiler and Steam Systems

A food plant boiler fires 50,000 MMBtu/yr of natural gas at $5.00/MMBtu. An O₂ trim system will cut flue-gas O₂ from 6% to 3%, raising combustion efficiency from 80% to 82% while the steam load stays the same. What are the annual fuel cost savings?