CSS - Certified Safety Supervisor Electrical Safety and LOTO Questions and Answers

Question 1

A supervisor is assigning roles for a major repair on a conveyor system.
One employee will be performing the actual maintenance requiring lockout, and several others work on the production line that the conveyor feeds.
In the context of Lockout/Tagout (LOTO), how are these employees classified according to OSHA 29 CFR 1910.147?

Accepted Answer

The maintenance employee is an 'authorized employee' and the others are 'affected employees.'

Answer

The maintenance employee is an 'affected employee' and the others are 'authorized employees.'

Answer

All employees are considered 'other employees' and must stay clear of the area.

Answer

The maintenance employee is a 'qualified person' and the others are 'competent persons.'

Question 2

A team of three mechanics is preparing to perform a complex overhaul on a large industrial press. As the safety supervisor, which of the following actions is a primary requirement for a compliant group lockout procedure?

Accepted Answer

Each authorized employee affixes their personal lockout device to the group lockbox or hasp.

Answer

A single lock is applied by the lead mechanic on behalf of the entire group.

Answer

The supervisor is the only person permitted to hold the key to the group lockbox.

Answer

The procedure can be skipped if all mechanics are in constant visual contact with the main disconnect.

Question 3

An electrical panel must be opened for diagnostic testing while energized. According to OSHA standards, which of the following individuals is permitted to perform this task?

Accepted Answer

A 'qualified person' with skills and knowledge of the equipment and safety training to recognize and avoid the associated hazards.

Answer

A 'competent person' designated by the supervisor for the task.

Answer

The maintenance supervisor, regardless of their specific electrical training.

Answer

Any employee who has completed basic electrical safety awareness training.

Question 4

A machine operator needs to clear a minor jam that is a routine part of the production process. The task is repetitive and does not require the operator to place any part of their body into the point of operation where a hazard exists. According to 29 CFR 1910.147, which of the following is true?

Accepted Answer

The task is exempt from LOTO under the 'normal production operations' exception, provided effective alternative protection is used.

Answer

Lockout/Tagout is required regardless of the task's simplicity.

Answer

Only a specially trained 'authorized employee' can clear the jam.

Answer

The machine's emergency stop button must be engaged, which is equivalent to LOTO.

Question 5

A qualified maintenance technician must measure voltage on energized terminals inside a 480V motor control center. As a supervisor, which administrative control is most critical to verify before this work begins?

Accepted Answer

An Energized Electrical Work Permit (EEWP) has been completed and authorized.

Answer

The technician has a copy of the equipment's one-line electrical diagram.

Answer

A fire watch has been posted at the location of the work.

Answer

The technician's CPR and First Aid certifications are current.

Question 6

On a new construction site, a supervisor observes a worker about to plug a portable power saw into an extension cord connected to a temporary power pole. To comply with OSHA 1926.404(b)(1), what is required for this 120-volt, 15-ampere receptacle outlet?

Accepted Answer

The outlet must be protected by a Ground-Fault Circuit-Interrupter (GFCI).

Answer

A surge protector must be used at the point of connection.

Answer

The saw must be a newer, double-insulated model.

Answer

The generator powering the pole must have an audible low-fuel alarm.