AIT Code Requirements 2 — Questions and Answers
Question 1: Under the National Electrical Code (NEC), what is the maximum number of current-carrying conductors allowed in a conduit before derating is required?
- 2
- 3 (Correct answer)
- 4
- 6
Correct answer: 3
The NEC requires derating of conductor ampacity when more than 3 current-carrying conductors are in a raceway.
Question 2: Which plumbing code is most widely adopted across the United States and serves as the basis for many state plumbing codes?
- International Plumbing Code (IPC) (Correct answer)
- Uniform Plumbing Code (UPC)
- National Standard Plumbing Code (NSPC)
- ASME Plumbing Code
Correct answer: International Plumbing Code (IPC)
The International Plumbing Code (IPC), published by the ICC, is the most widely adopted plumbing code in the US.
Question 3: According to OSHA standards, what is the minimum height at which fall protection is required for general industry workers?
- 4 feet (Correct answer)
- 6 feet
- 10 feet
- 15 feet
Correct answer: 4 feet
OSHA requires fall protection in general industry when workers are exposed to a fall of 4 feet or more.
Question 4: In HVAC installations, which code primarily governs the mechanical systems including ductwork and equipment clearances?
- International Fire Code
- International Mechanical Code (IMC) (Correct answer)
- International Energy Conservation Code
- NFPA 70
Correct answer: International Mechanical Code (IMC)
The International Mechanical Code (IMC) governs HVAC ductwork, equipment installation, and clearance requirements.
Question 5: What does the term 'AHJ' stand for in the context of code compliance and inspections?
- Approved Hazard Jurisdiction
- Authority Having Jurisdiction (Correct answer)
- Apprentice Handling Job
- Assigned Housing and Jurisdiction
Correct answer: Authority Having Jurisdiction
AHJ stands for Authority Having Jurisdiction, referring to the organization or individual responsible for enforcing code requirements.
Question 6: Under the International Building Code (IBC), which occupancy classification applies to a commercial auto repair garage?
- S-1 (Correct answer)
- B
- F-1
- H-3
Correct answer: S-1
S-1 (Moderate-Hazard Storage) occupancy applies to auto repair garages under the IBC.
Question 7: Which document published by ASME governs the safe installation and inspection of boilers and pressure vessels?
- ASME B31.1
- ASME Boiler and Pressure Vessel Code (BPVC) (Correct answer)
- ASME A17.1
- ASME B16.5
Correct answer: ASME Boiler and Pressure Vessel Code (BPVC)
The ASME Boiler and Pressure Vessel Code (BPVC) sets standards for the design, fabrication, and inspection of boilers and pressure vessels.
AIT Code Requirements 2
Under the National Electrical Code (NEC), what is the maximum number of current-carrying conductors allowed in a conduit before derating is required?