Electrical Safety-Related Work Practices practice questions for the ASP exam

A maintenance crew has opened and locked out the disconnect for a motor circuit and the nominal voltage is 480 volts. Before the crew begins work, the qualified person operates the start controls and confirms the motor will not restart. She then tests the motor terminals with a voltage tester and finds no voltage. A technician points out that the control circuit shares a conduit with another circuit that is still energized, and that other equipment feeds the same motor leads. What must the qualified person's test also do before the circuit can be treated as deenergized?

1. A.Be witnessed by the employee who applied the lock, since only that employee can verify the circuit is deenergized
2. B.Determine whether any energized condition exists from inadvertently induced voltage or unrelated voltage backfeed, even though the circuit parts were deenergized and presumed safe
3. C.Be replaced by a visual inspection of the lock and tag, because a lockout device is sufficient proof of a deenergized condition
4. D.Be repeated at the start of each following work shift, because the test remains valid for only one shift

On a construction site, a portable diesel generator feeds a distribution panel through a transformer-based separately derived system. The system is grounded, and the electrician is deciding where to make the connections to the grounding electrode. A coworker proposes landing the equipment grounding conductor and the grounding electrode conductor on the grounded circuit conductor at a terminal on the load side of the system's overcurrent devices, since the loads are located there. Which response is correct under the standard?

1. A.Not acceptable; the connections must be made to the grounded circuit conductor on the supply side of the system disconnecting means or overcurrent devices
2. B.Not acceptable; the equipment grounding conductor must instead be bonded only at the last receptacle outlet on each branch circuit
3. C.Acceptable, because the connection may be made anywhere on the grounded circuit conductor as long as the path to ground is continuous
4. D.Acceptable, because a separately derived system is only required to bond its neutral to the generator frame, not to a grounding electrode