Your Amazon purchases made using this link will benefit the United States Mine Rescue Association

Section 300: Electrical Test No. 4
Practice test questions for the PA Mine Officials' Exam


Progress Indicator:
Question 1 of 15

1.  In no case shall the potential used in the trolley system be higher than __________.

Choices:
  1. 480 volts
  2. 600 volts
  3. 1,000 volts
  4. 24 volts