AIT Code Requirements 4 — Questions and Answers
Question 1: Which ASME standard governs the design and construction of pressure piping for power plants?
- ASME B31.3
- ASME B31.1 (Correct answer)
- ASME B31.5
- ASME B31.9
Correct answer: ASME B31.1
ASME B31.1 (Power Piping) covers piping systems for steam, water, oil, and gas used in electric power generation plants.
Question 2: According to the NEC, what is the required clearance above the top of a service panel (electrical panel) when it is located in a dedicated electrical space?
- 12 inches
- 36 inches
- 6 feet from floor to structural ceiling (Correct answer)
- 18 inches
Correct answer: 6 feet from floor to structural ceiling
NEC Article 110.26(E) requires dedicated electrical space extending from the floor to a height of 6 feet above the equipment or to the structural ceiling.
Question 3: What does 'UL Listed' mean when appearing on electrical equipment?
- The product meets federal government manufacturing standards
- A nationally recognized testing laboratory has evaluated the product for safety (Correct answer)
- The product is approved for export to all countries
- The equipment has passed OSHA's workplace safety inspection
Correct answer: A nationally recognized testing laboratory has evaluated the product for safety
UL Listed means Underwriters Laboratories, a nationally recognized testing laboratory (NRTL), has tested and certified the product meets safety standards.
Question 4: Under the International Mechanical Code, what is the minimum clearance typically required in front of a furnace or air handler for service access?
- 12 inches
- 18 inches
- 30 inches (Correct answer)
- 48 inches
Correct answer: 30 inches
The IMC typically requires 30 inches of clear working space in front of heating and cooling equipment for service and replacement.
Question 5: Which NFPA code is commonly known as the 'Life Safety Code' and addresses egress, exit requirements, and occupant safety?
- NFPA 72
- NFPA 101 (Correct answer)
- NFPA 13
- NFPA 58
Correct answer: NFPA 101
NFPA 101, the Life Safety Code, establishes minimum requirements for egress, emergency lighting, and other life safety features in buildings.
Question 6: Under OSHA's Lockout/Tagout standard (29 CFR 1910.147), what must be done FIRST before beginning an equipment energy control procedure?
- Apply the lockout device
- Notify all affected employees
- Attempt to restart the equipment to verify shutdown
- Identify all energy sources (Correct answer)
Correct answer: Identify all energy sources
The first step in any LOTO procedure is to identify all energy sources (electrical, hydraulic, pneumatic, thermal, etc.) that must be controlled.
Question 7: What is the code significance of an 'approved' material or method in most US building codes?
- It is listed in the code itself as the only acceptable option
- It has been accepted by the AHJ as meeting the intent of the code (Correct answer)
- It has received national manufacturer certification only
- It is automatically compliant in all jurisdictions without inspection
Correct answer: It has been accepted by the AHJ as meeting the intent of the code
An 'approved' material or method is one that the Authority Having Jurisdiction (AHJ) has determined meets the intent and requirements of the applicable code.
AIT Code Requirements 4
Which ASME standard governs the design and construction of pressure piping for power plants?