ICC Mechanical, Plumbing, and Electrical Code Professionals 2 — Questions and Answers
Question 1: Under the International Mechanical Code, what is the minimum clearance required on the control side of heating equipment rated above 400,000 BTU/hr?
- 12 inches
- 18 inches
- 24 inches
- 36 inches (Correct answer)
Correct answer: 36 inches
The IMC requires 36 inches of clearance on the control side of equipment rated above 400,000 BTU/hr to allow safe access for servicing.
Question 2: Which type of trap is explicitly prohibited by the International Plumbing Code?
- P-trap
- Running trap
- Drum trap (Correct answer)
- House trap
Correct answer: Drum trap
Drum traps are prohibited by the IPC because they collect debris and are difficult to clean, making them a sanitary hazard.
Question 3: In the NEC, what does the term 'listed' mean when applied to electrical equipment?
- Approved by the AHJ only
- Equipment included in a list published by an NRTL and meeting applicable standards (Correct answer)
- Equipment that has passed a manufacturer's internal test
- Approved by the local utility company
Correct answer: Equipment included in a list published by an NRTL and meeting applicable standards
NEC Article 100 defines 'listed' as equipment that has been evaluated by a nationally recognized testing laboratory (NRTL) and included in their published list.
Question 4: Under the International Mechanical Code, a Type I kitchen hood must exhaust a minimum of how many cubic feet per minute per linear foot of hood over light-duty cooking equipment?
- 50 CFM/ft
- 100 CFM/ft (Correct answer)
- 150 CFM/ft
- 200 CFM/ft
Correct answer: 100 CFM/ft
The IMC requires Type I hoods to exhaust a minimum of 100 CFM per linear foot of hood for light-duty cooking appliances.
Question 5: The International Plumbing Code requires that water service pipe from the street to a building be installed at what minimum depth?
- At or below the frost line (Correct answer)
- At least 6 inches below grade
- At least 12 inches below grade
- At or below the local water table
Correct answer: At or below the frost line
The IPC requires water service pipe to be installed at or below the frost line to prevent freezing, with the depth varying by local climate.
Question 6: According to NEC Article 210, which of the following circuits is NOT required to be a 20-ampere small-appliance branch circuit in a dwelling kitchen?
- Refrigerator circuit (Correct answer)
- Counter-top receptacle circuit
- Circuits serving the dishwasher
- Circuits for dining room receptacles
Correct answer: Refrigerator circuit
The refrigerator may be served by a dedicated 15- or 20-ampere circuit; it is not required to share the small-appliance branch circuits serving countertop receptacles.
Question 7: Under the International Mechanical Code, which duct material is required for commercial kitchen Type I hood exhaust ducts?
- Galvanized steel
- Stainless steel or steel with continuous external welds (Correct answer)
- Aluminum flex duct
- PVC-coated fiberglass
Correct answer: Stainless steel or steel with continuous external welds
IMC Section 506.3 requires Type I kitchen exhaust ducts to be constructed of stainless steel or carbon steel with continuous external liquid-tight welds due to grease fire risk.
ICC Mechanical, Plumbing, and Electrical Code Professionals 2
Under the International Mechanical Code, what is the minimum clearance required on the control side of heating equipment rated above 400,000 BTU/hr?