Exam reference
The inspector exams, residential and commercial
Format, timing and where the marks actually sit, for all eight exams. Every weighting here is transcribed from the certification content outline ICC publishes for that exam, and every one sums to exactly 100 percent.
B1 · Residential Building Inspector
60 questions · 120 minutes · open book
Heaviest area: Wall Construction and Coverings at 27%
E1 · Residential Electrical Inspector
60 questions · 120 minutes · open book
Heaviest area: Branch Circuit and Feeder Requirements at 28%
M1 · Residential Mechanical Inspector
60 questions · 120 minutes · open book
Heaviest area: Heating, Cooling and Water Heaters at 21%
P1 · Residential Plumbing Inspector
60 questions · 120 minutes · open book
Heaviest area: Sanitary Drainage at 23%
B2 · Commercial Building Inspector
80 questions · 210 minutes · open book
Heaviest area: Public Safety and Special Construction at 31%
E2 · Commercial Electrical Inspector
80 questions · 210 minutes · open book
Heaviest area: Branch Circuit and Feeder Requirements at 19%
M2 · Commercial Mechanical Inspector
50 questions · 120 minutes · open book
Heaviest area: Exhaust and Ventilation Systems at 20%
P2 · Commercial Plumbing Inspector
60 questions · 150 minutes · open book
Heaviest area: Water Supply and Distribution at 18%
R5 Residential Combination Inspector
Earned by passing all four residential exams. 240 questions and eight hours in total.