NCCER Heavy Equipment case studies
NCCER Heavy Equipment · Put your knowledge to work in context.
The NCCER Heavy Equipment Operations credential is a construction-industry qualification for people who operate or supervise the operation of earthmoving machinery such as dozers, loaders, excavators, backhoes, scrapers, and motor graders. It is used by training programs, contractors, and hiring managers to confirm that an operator understands jobsite safety, machine inspection and maintenance, control functions and hand signals, soil behavior, excavation and shoring practice, grade and elevation work, and machine-specific production techniques. The NCCER Heavy Equipment case studies are 5 cases and about 3,671 words.
1Trench Protection on a Falling-Grade Sewer Line
Crew is laying 8-inch PVC sewer in an 18 m long, 0.9 m wide trench along a residential street. Depth is 1.5 m at the north end and 2.1 m at the south end, following the pipe grade.
767 words, about 4 min2Cut/Fill Balance With Rejected Material
Mass grading for a building pad. The plan takes 4,800 BCY of cut from an on-site borrow area and uses it as fill; the pad needs 3,600 CCY of compacted fill.
659 words, about 3 min3A Laser Level That Doesn't Check Out
A grade checker sets a rotating laser and establishes the height of instrument from a project benchmark at elevation 104.50 ft. The rod reads 4.00 ft on the benchmark, so the crew works to HI = 108.50 ft.
691 words, about 3 min4Working Under a 12.47 kV Line
A crew is removing a failed culvert with a track excavator on a county road. A 12.47 kV distribution line crosses the work area.
772 words, about 4 min5Setting a Precast Structure With a 20-Ton Excavator
A 20-metric-ton excavator is setting a precast manhole base into a deep sanitary sewer. Its published lift chart (over the front, level ground, bucket on) gives: 12,400 lb at 15 ft, 10,100 lb at 18 ft, 8,300 lb at 22 ft, 7,000 lb at 25 ft radius.
782 words, about 4 min