NM Boiler Operator case studies
NM Boiler Operator · Put your knowledge to work in context.
The New Mexico Boiler Operator License Examination is a multiple-choice licensing test connected with the New Mexico Regulation & Licensing Department, whose Construction Industries Division is the parent of the Boiler Safety Bureau listed in the Department's site navigation. The credential is aimed at people who fire, tend, and supervise steam and hot water heating or power boilers in commercial, institutional, and industrial plants in New Mexico, and at maintenance technicians who want formal recognition of their operating knowledge rather than only on-the-job experience. The NM Boiler Operator case studies are 5 cases and about 2,966 words.
1Reinstalling a Used Firetube With No Readable Nameplate or Data Report
A frozen-food plant near Las Cruces is reinstalling a used 200 hp firetube boiler purchased at auction. The unit is a three-pass, wet-back design, 12 ft long with a 60 in shell, built in 1994 by a manufacturer that has since closed.
662 words, about 3 min2Low-Water Cutoff Trips Repeatedly and the Crew Wants to Jumper It
A 300 hp, 125 psig firetube boiler at a commercial laundry has tripped on low water six times in one 8-hour shift. The gauge glass level surges violently, and at times the visible level drops to the bottom nut before the feedwater pump catches up.
613 words, about 3 min3High CO and Low O2 After a Gas Regulator Change
A 500 hp natural-gas firetube rated 150 psig and 21 MMBtu/hr high fire serves a milk-drying plant. Three months ago the burner was tuned to 3.0% O2, 60 ppm CO, and 380 deg F stack temperature at high fire.
603 words, about 3 min4Softener Failure, Scale, and Carryover on a Dairy Boiler
A 250 hp, 150 psig firetube boiler at a dairy supplies 12,000 lb/hr of saturated steam; about 20% of feedwater is well-water makeup with 18 grains per gallon total hardness. The softener resin was exhausted during a four-day holiday and went unnoticed.
520 words, about 3 min5Expired Certificate, Overset Relief Valve, and a Hospital Demand
A 60-bed hospital's standby boiler is out for tube replacement, leaving one 350 hp, 150 psig firetube to carry the whole load, including sterilization and domestic hot water. Yesterday's annual inspection found: the boiler's certificate of inspection expired seven months ago; the safety valve is set at 175 psig and weeping; the low-water fuel cutoff has a wire jumper across its switch; the gauge glass has a broken guard and a leaking lower connection; and the last try-lever test was recorded 14 months ago.
568 words, about 3 min