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

A maintenance crew is about to service a motor control circuit on a conveyor. The electrician proposes to stop the conveyor with the push-button stop station and the safety interlock on the guard, then begin work without opening the main disconnect, because the controls show the circuit is 'off.' Under the standard, what is the correct response?

1. A.Acceptable, provided a tag is hung on the push-button station
2. B.Not acceptable; control circuit devices and interlocks may not be the sole means of deenergizing or substitute for lockout and tagging
3. C.Acceptable, as long as the interlock and push button are both used together
4. D.Acceptable for fixed equipment, since interlocks are permanent wiring methods

A contractor's crew will repaint a rooftop sign that sits close to an uninsulated utility distribution line owned and operated by the local power company. The employer decides not to install guarding or insulation and instead wants the line deenergized for the job. Which action satisfies the standard before the crew starts work?

1. A.Let the crew begin and deenergize the line only if a worker's tool or ladder comes within reach of it
2. B.Make arrangements with the utility that operates or controls the line to deenergize and ground it before work starts
3. C.Have a crew member visually confirm that the line is not sparking or humming, then treat it as deenergized
4. D.Have the crew's own electrician open the building's main service disconnect, since this removes power from the nearby line

A maintenance technician must replace a lamp holder in a switchgear room. Exposed energized bus bars run along the wall next to the work spot. The only ladder on hand is an aluminum stepladder, and the technician could easily lean the ladder against, or sway into, the bus bars while working. What must the employer do before the task goes ahead?

1. A.Provide a portable ladder with nonconductive siderails, because the ladder or the employee could contact exposed energized parts
2. B.Allow the aluminum ladder if the technician avoids wearing metal jewelry while climbing
3. C.Allow the aluminum ladder if a coworker holds its base, since the bus bars are not being touched directly
4. D.Allow the aluminum ladder as long as the technician wears a hard hat and safety glasses