IBEW Reading Comprehension Skills 2 — Questions and Answers
Question 1: A technical manual states: 'Before energizing any circuit, the technician must verify that all grounding conductors are properly connected and that no personnel are within the restricted zone.' What is the PRIMARY purpose of this instruction?
- To speed up the energizing process
- To ensure safety before applying power (Correct answer)
- To document circuit configurations
- To identify grounding conductor types
Correct answer: To ensure safety before applying power
The instruction lists two safety preconditions (grounding and personnel clearance) that must be met before energizing, making worker safety the primary purpose.
Question 2: A passage reads: 'The National Electrical Code requires that all electrical installations be inspected and approved by the authority having jurisdiction prior to being placed in service.' Which term describes 'the authority having jurisdiction'?
- The lead electrician on the project
- The organization or official responsible for enforcing code (Correct answer)
- The equipment manufacturer's representative
- The project owner or building manager
Correct answer: The organization or official responsible for enforcing code
'Authority having jurisdiction' (AHJ) is a standard NEC term referring to the organization, office, or individual responsible for enforcing the requirements of a code.
Question 3: Read this excerpt: 'Conductors shall be protected from physical damage. Where subject to physical damage, conductors shall be protected by conduit, electrical metallic tubing, Schedule 80 PVC, or equivalent.' The word 'equivalent' most likely means:
- Any material that is less expensive
- Another protection method offering comparable protection (Correct answer)
- Only conduit or tubing approved by the manufacturer
- Protection methods approved exclusively by the NEC
Correct answer: Another protection method offering comparable protection
'Equivalent' here means another method that provides a comparable level of physical protection to the listed options.
Question 4: A work order reads: 'Install a 20-ampere, 120-volt, GFCI-protected receptacle in the bathroom. Ensure the receptacle is tamper-resistant and located within 36 inches of the basin.' What does 'tamper-resistant' most likely refer to?
- A receptacle that cannot be removed from the wall
- A receptacle with internal shutters that block foreign objects (Correct answer)
- A receptacle protected by a lockable cover plate
- A receptacle rated for outdoor wet locations
Correct answer: A receptacle with internal shutters that block foreign objects
Tamper-resistant receptacles have internal shutters that prevent children from inserting objects into the slots unless equal pressure is applied to both slots simultaneously.
Question 5: A safety bulletin states: 'Lockout/Tagout procedures must be followed when performing maintenance on electrical equipment. A lockout device physically prevents the energy source from being re-energized, while a tagout device only provides a warning.' Based on this, which provides MORE protection?
- Tagout, because it warns all workers
- Lockout, because it physically prevents re-energization (Correct answer)
- Both provide equal protection in all situations
- Neither; both must always be used together by law
Correct answer: Lockout, because it physically prevents re-energization
The passage explicitly states that a lockout device physically prevents re-energization, making it more protective than a tagout device which only provides a warning.
Question 6: A passage says: 'Overcurrent protection devices must be rated for the circuit's voltage and must interrupt fault current before damage occurs to conductors or equipment.' The phrase 'interrupt fault current' means:
- Reduce the normal operating current
- Stop the flow of abnormal excess current during a fault (Correct answer)
- Increase the circuit's current-carrying capacity
- Monitor current levels and send alerts when exceeded
Correct answer: Stop the flow of abnormal excess current during a fault
Interrupting fault current means stopping the abnormal flow of electricity that occurs during a short circuit or ground fault before it can cause damage.
Question 7: An instruction reads: 'When pulling wire through conduit, apply only approved pulling lubricant. Do not use petroleum-based lubricants on conductors with thermoplastic insulation, as they may cause insulation degradation.' Why is the lubricant type important?
- Petroleum lubricants make wire pulling easier but leave residue
- Petroleum lubricants can damage thermoplastic insulation over time (Correct answer)
- All lubricants are equivalent for thermoplastic-insulated wire
- The type of lubricant affects conductor ampacity ratings
Correct answer: Petroleum lubricants can damage thermoplastic insulation over time
The passage explicitly warns that petroleum-based lubricants can cause degradation (breakdown) of thermoplastic insulation, which is why lubricant type matters.
IBEW Reading Comprehension Skills 2
A technical manual states: 'Before energizing any circuit, the technician must verify that all grounding conductors are properly connected and that no personnel are within the restricted zone.' What is the PRIMARY purpose of this instruction?