10 free STSC practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
STSC Practice Test 5Tutor mode
Question 1 of 10
Hazard Identification and Control
A sump pump motor can be powered from the utility panel or, through an automatic transfer switch, from a standby generator. An electrician has locked and tagged the breaker in the utility panel and is ready to replace the motor. What must the supervisor require before work begins?