EIAT and NEIEP Test Tools, Equipment and Installation 2 — Questions and Answers
Question 1: Which type of conduit connector is used to join two sections of rigid metal conduit (RMC)?
- Compression fitting
- Coupling (Correct answer)
- Setscrew connector
- Watertight hub
Correct answer: Coupling
A threaded coupling joins two pieces of rigid metal conduit by threading onto the ends of each conduit section.
Question 2: What is the purpose of using pulling lubricant when installing conductors?
- Waterproof the conductor insulation
- Reduce friction to prevent insulation damage during wire pulling (Correct answer)
- Bond the conductors inside the conduit
- Increase the fill capacity of conduit
Correct answer: Reduce friction to prevent insulation damage during wire pulling
Pulling lubricant reduces friction between conductors and conduit walls, protecting wire insulation and making long pulls easier.
Question 3: A wire nut (twist-on connector) is rated by:
- The number of screws it has
- The minimum and maximum wire gauge and combination it can safely join (Correct answer)
- Its color only
- The voltage of the circuit only
Correct answer: The minimum and maximum wire gauge and combination it can safely join
Wire nuts are rated for specific wire gauge ranges and combination limits to ensure a secure and safe connection.
Question 4: When installing a circuit breaker, the correct installation requires that the breaker:
- Be installed with the load wire on the line terminal
- Snap firmly onto the bus bar and be torqued per manufacturer specs (Correct answer)
- Be installed with handles facing left
- Be filled with thermal paste for heat transfer
Correct answer: Snap firmly onto the bus bar and be torqued per manufacturer specs
A circuit breaker must snap positively onto the panel bus bar and all lugs must be torqued to manufacturer specifications to ensure proper contact.
Question 5: Which type of anchoring fastener is used to attach electrical boxes to hollow (drywall) walls?
- Tapcon concrete screw
- Toggle bolt or hollow wall anchor (Correct answer)
- Lag screw
- Powder-actuated fastener
Correct answer: Toggle bolt or hollow wall anchor
Toggle bolts and hollow wall anchors expand behind the drywall to provide a secure attachment point where there is no solid backing.
Question 6: The maximum number of conductors permitted in a standard 4-inch square junction box (1.5 inch deep) when using #12 AWG conductors is determined by:
- The number of knockouts in the box
- NEC fill calculations based on conductor volume allowances (Correct answer)
- The physical size of the cover plate
- Local code amendments only
Correct answer: NEC fill calculations based on conductor volume allowances
NEC Article 314 provides box fill calculations using cubic inch volumes per conductor size to ensure conductors are not overcrowded in boxes.
EIAT and NEIEP Test Tools, Equipment and Installation 2
Which type of conduit connector is used to join two sections of rigid metal conduit (RMC)?