| Question |
Answer |
Notes |
| True or false: It is acceptable to have your supervisor remove your personal lock and tag from a locked-out system. |
False |
|
| Name two of the four most common electrical injuries. |
Electrocution; electrical shock; burns; falls |
|
| Which of the following devices is designed specifically to protect people from electrical shock? A. Circuit breaker; B. Fuses; C. Ground Fault Circuit Interrupter |
C. Ground Fault Circuit Interrupter |
|
| When working on equipment where hazardous energy exists, what control measure should you use? |
Lock out/Tag out/Try out; LOTOTO |
|
| Which of the following could result from an arc fault? A. Loss of hearing; B. Blindness; C. Broken bones; D. All of the above; E. A and B only |
D. All of the above |
|
| How often are electrical ground checks required on a mine site? A. Daily; B. Weekly; C. Monthly; D. Annually |
D. Annually |
|
| Name two things to look for when inspecting an extension cord. |
Missing ground prong; exposed conductors at cord cap; cuts in the cord insulation exposing conductors |
|
| What fuels a Class C fire? A. Paper; B. Gasoline; C. Magnesium; D. Energized electrical circuits |
D. Energized electrical circuits |
|
| Is it safe to use water on an electrical fire? |
No |
Water and electricity generally do not mix very well. Impurities in ordinary tap water help make it a good conductor of electricity. Using water on an electrical fire will almost always present a major shock hazard and should never be considered. |
| What factors affect the severity of electrical shock? A. Length of time in contact; B. Path of travel through the body; C. Amount of current; D. All of the above; E. None of the above |
D. All of the above |
|
| What does GFCI stand for? A. Ground Failure Circuit Indicator; B. Ground Fault Circuit Interrupter; C. General Failure Circuit Indicator; D. Gross Funky Clown Impressions |
B. Ground Fault Circuit Interrupter |
GFCI outlets and breakers have a sensor that detects electrical imbalances as low as 4 to 5 milliamps across the hot and neutral wires. When an imbalance occurs, the sensor instantly breaks the circuit rendering the circuit dead. Power can be restored by resetting the tripped outlet or breaker. |
| What can inadequate wiring cause? A. A tool or the wiring to heat up; B. An electrical shock; C. A tool to become energized; D. A person to become unconscious |
A. A tool or the wiring to heat up. |
|
| In addition to electrical energy, what other types of stored energy may be present? A. Mechanical; B. Hydraulic; C. Pneumatic; D. Kinetic; E. All of the above |
E. All of the above |
|
| Which of the following is the proper LOTO procedure? A. Shut down, isolate, dissipate energy; B. Identify potential hazards, notify affected employees, shut down, isolate, lock out with individual locks, dissipate energy; C. Identify hazards, isolate, lock out with individual locks; D. Notify affected employees, shut down, lock out with individual locks, dissipate energy |
B. Identify potential hazards, notify affected employees, shut down, isolate, lock out with individual locks, dissipate energy |
|
| The temperature of an arc flash can reach ____° F. A. 10,000; B. 35,000; C. 500; D. 67,000 |
B. 35,000 |
|
| True or false: Electrical circuits must always be de-energized prior to any electrical work being performed. |
False |
§57.12017 Work on power circuits. Power circuits shall be deenergized before work is done on such circuits unless hot-line tools are used. Suitable warning signs shall be posted by the individuals who are to do the work. §77.500 Electric power circuits and electric equipment; deenergization. Power circuits and electric equipment shall be deenergized before work is done on such circuits and equipment, except when necessary for troubleshooting or testing. |
| What is the minimum clearance distance from overhead powerlines carrying ≤ 50KV? A. 5 feet; B. 10 feet; C. 25 feet; D. 150 feet |
B. 10 feet |
|
| The release of thermal energy from an arc flash is measured using what unit? A. Calories per square centimeter; B. Miles per hour; C. Feet per second; D. Decibels |
A. Calories per square centimeter |
|
| Which hard hat conducts electricity and should not be used around electrical hazards? A. Class A; B. Class B; C. Class C; D. Class D |
C. Class C |
|
| Electricity always wants to travel to the _______. A. Circuit; B. Ground; C. Insulation; D. Sky |
B. Ground |
|
| True or false: If something is an electric conductor, it has little resistance. |
True |
|
| You come across a damaged extension cord on your job site. The fray is very small, and you need the cord for your work today. What should you do? A. Use the cord; B. Dispose of the cord; C. Repair the cord with duct tape; D. Leave the cord on your supervisor’s desk |
B. Dispose of the cord |
|
| What is Lockout/Tagout? A. A process of tagging every piece of electrical equipment for inventory; B. A process to safely inspect and dispose of broken electrical equipment; C. A process of locking the areas with electrical equipment; D. A process of working on electrical equipment safely |
D. A process of working on electrical equipment safely |
|
| What does LOTO stand for? |
Lockout/tagout |
|
| Put these steps of LOTO in order. A. Apply lockout device; B. Release stored energy; C. Isolate equipment; D. Start work on equipment; E. Shut down equipment; F. Try to start the equipment; |
E. Shut down equipment; C. Isolate equipment; B. Release stored energy; F. Try to start the equipment; A. Apply lockout device; D. Start work on equipment |
|
