OSHA Elec practice test 8

1. A worker is using rubber insulating gloves for electrical work, and the insulating material is subject to damage during use. What must be done to protect the insulating material?

1. The insulating material shall be protected, for example by an outer covering of leather.
2. The gloves must be replaced after every single use.
3. The worker must apply a layer of conductive grease to the outside.
4. The gloves must be soaked in water before use to increase flexibility.

2. A facility manager wants to reclassify a Class I, Division 1 location as a Class I, Zone 2 location. Under what condition is this reclassification permitted?

1. Only if all of the space classified because of a single flammable gas or vapor source is reclassified.
2. Only if the new Zone 2 equipment is marked with the applicable gas classification groups.
3. Only if the area is supervised by a qualified registered professional engineer.
4. Only if the Division 1 equipment is replaced with Zone 0 listed equipment.

3. A facility manager is installing electric equipment that relies on natural air circulation for cooling. To prevent overheating, what installation condition must be met regarding the equipment's exposed surfaces?

1. Room airflow over such surfaces must not be prevented by walls or adjacent installed equipment.
2. The equipment must be mounted directly against the wall to save space.
3. The equipment must be covered with a protective shield to block dust.
4. The equipment must be installed in a sealed cabinet to control temperature.

4. An electrician is routing flexible cords and cables through a doorway in an industrial facility. What must be done to comply with safety standards regarding physical damage?

1. Protect the cords from accidental damage caused by pinch points such as doorways.
2. Run the cords directly under the door without protection if the door is closed most of the day.
3. Use standard household extension cords without additional protection since they are rated for indoor use.
4. Secure the cords with staples directly over the pinch point to keep them out of the way.

5. An electrician is installing a lighting fixture in a basement that is subject to moderate degrees of moisture. According to the definitions provided, how is this location classified?

1. Dry location
2. Wet location
3. Damp location
4. Intrinsically safe location

6. A worker is installing wiring in a vehicle-washing area where the location is subject to saturation with water. Based on the location classifications, how should this area be categorized for electrical installation purposes?

1. Dry location
2. Damp location
3. Wet location
4. Isolated location

7. An electrician is installing metal-enclosed equipment in an area accessible to unqualified persons. How must ventilating or similar openings in this equipment be designed to protect energized parts?

1. They shall be designed so that foreign objects inserted through these openings will be deflected from energized parts.
2. They shall be covered with a fine mesh screen that allows air flow but blocks all solid objects.
3. They shall be located only on the top of the enclosure to prevent gravity-fed insertion of objects.
4. They shall be sealed with removable panels that can be locked during operation.

8. An electrician is installing a portable distribution box outdoors for a temporary event. To comply with OSHA requirements regarding exposure to live parts and weather, how must the box be constructed and mounted?

1. It must be of weatherproof construction and mounted so the bottom of the enclosure is not less than 6 inches above the ground.
2. It must be of standard indoor construction but mounted on a wooden pallet at least 12 inches off the ground.
3. It must be of weatherproof construction and mounted directly on the ground to ensure stability.
4. It must be of weatherproof construction and mounted so the bottom of the enclosure is not less than 12 inches above the ground.

9. An electrician is working on a series capacitor installation. To ensure proper switching sequence, which of the following methods is permitted by the regulation?

1. Using mechanically sequenced isolating and bypass switches
2. Relying solely on a single-pole disconnect switch
3. Using a standard circuit breaker without sequencing
4. Installing a GFCI on the capacitor bank

10. An electrician is reviewing equipment documentation to verify that a specific device has been tested and found safe for use in a specified manner by a nationally recognized laboratory that makes periodic inspections of production. According to the definitions, how is this equipment classified?

1. Labeled
2. Listed
3. Isolated
4. Insulated

11. Where fused cutouts are not suitable to interrupt the circuit manually while carrying full load, what is required if the cutouts are not interlocked with the switch?

1. A conspicuous sign shall be placed at such cutouts reading: “WARNING—DO NOT OPERATE UNDER LOAD.”
2. The cutouts must be replaced with circuit breakers rated for the full load.
3. The circuit must be de-energized before any manual operation of the cutouts.
4. A second fuse must be installed in parallel to share the load current.

12. An electrician is working on a motor controller where live parts operating at over 150 volts to ground are guarded against accidental contact only by location. If adjustment or attendance is necessary during operation, what additional safety measure is required?

1. Insulating mats or platforms shall be provided so that the attendant cannot readily touch live parts unless standing on the mats or platforms.
2. The attendant must wear a Class 0 rubber insulating glove and a face shield.
3. The live parts must be de-energized and locked out before any adjustment is made.
4. A second qualified person must be present to monitor the work area.

13. An industrial worker is installing a disconnecting means for an outdoor electric sign. If the disconnect is located out of the line of sight from any section of the sign that may be energized, what additional safety feature is required?

1. It must be capable of being locked in the open position
2. It must be located at least 5 feet from the inside walls of the sign
3. It must be protected by a GFCI device
4. It must be operated by a qualified person only

14. An electrician is working on an escalator and needs to locate the disconnecting means. According to the standard, where must this disconnecting means be installed?

1. In the space where the controller is located.
2. Within sight of the motor controller at the top landing.
3. In the main electrical room serving the building.
4. Adjacent to the moving steps at the bottom landing.

15. An electrician is installing control panels for an elevator where the drive machine is located in a separate room from the panels. To comply with safety requirements for this specific configuration, how must the control panels be housed?

1. In cabinets with doors or panels capable of being locked closed
2. In open racks to allow for immediate visual inspection of all components
3. In standard NEMA 1 enclosures without locking provisions
4. Mounted directly on the wall with no enclosure required

16. An electrician is working in an area where the exact location of underground electric powerlines is unknown. They are using a jack-hammer to break up pavement. What specific PPE must the employer provide to protect against contacting a line?

1. Insulated protective gloves
2. A Class 0 rubber insulating blanket
3. A voltage-rated face shield
4. A non-conductive hard hat with chin strap

17. An electrician is working on a panelboard located in a general open space where normally enclosed live parts have been exposed for inspection. What action is required regarding the working space in this area?

1. The working space must be guarded.
2. The working space must be widened to 36 inches.
3. The working space must be cleared of all tools and materials.
4. The working space must be marked with high-visibility tape.

18. An electrician is installing indoor communication conductors as open conductors on the inside of a building. To ensure safety, how far must these conductors be located from any light, power, or Class 1 circuit conductors unless a special protective method is used?

1. At least 2 inches (50.8 mm)
2. At least 6 inches (152.4 mm)
3. At least 12 inches (304.8 mm)
4. At least 18 inches (457.2 mm)

19. When working on electrical equipment where energized parts are exposed, what is the minimum vertical clearance required for the workspace above the floor or platform?

1. 6 feet (1.83 m)
2. 6 feet 6 inches (1.98 m)
3. 7 feet (2.13 m)
4. 8 feet (2.44 m)

20. An electrician is installing pull and junction boxes for a system operating at 1,000 volts nominal. According to OSHA requirements, how must the covers for these boxes be marked?

1. Permanently marked “HIGH VOLTAGE” on the outside of the box cover, readily visible and legible.
2. Marked with the voltage rating in red ink on the inside of the cover.
3. Labeled with a standard 'Danger' sign on the adjacent wall.
4. Marked “HIGH VOLTAGE” on the inside of the box cover to prevent weathering.

21. A worker is preparing a made electrode for grounding a temporary construction site. Which condition must the electrode meet before installation?

1. It must be painted with a protective enamel coating to prevent rust.
2. It must be free from nonconductive coatings such as paint or enamel.
3. It must be installed above the permanent moisture level to avoid corrosion.
4. It must be connected to the neutral conductor rather than the equipment ground.

22. A technician is servicing X-ray equipment where multiple pieces of equipment are operated from the same high-voltage circuit. What specific safety feature must the high-voltage switch or equivalent disconnecting means possess?

1. It must be operable from a location readily accessible from the X-ray control.
2. It must be constructed, enclosed, or located so as to avoid contact by employees with its live parts.
3. It must be a grounding-type attachment plug cap and receptacle of proper rating.
4. It must be grouped and identified at the principal exit doors.

23. An electrician is installing a general-purpose 125-volt, 20-ampere receptacle for a permanently installed pool at a dwelling unit. What is the required vertical height limit for this receptacle relative to the floor, platform, or grade level serving the pool?

1. Not more than 1.52 m (5 ft)
2. Not more than 1.98 m (6.5 ft)
3. Not more than 2.44 m (8 ft)
4. Not more than 3.05 m (10 ft)

24. An electrician is installing equipment in a Class II hazardous location containing combustible fibers. Which classification system must the installation use?

1. The division classification system.
2. The zone classification system.
3. Either the division or zone classification system, at the installer's discretion.
4. The intrinsic safety system exclusively.

25. An industrial worker is preparing to enter a transformer vault to perform maintenance. Before entering, what must the worker verify regarding the contents of the vault to comply with OSHA requirements?

1. That all stored materials have been removed from the vault
2. That the vault is locked to prevent unauthorized entry
3. That the transformer is grounded and bonded
4. That the ventilation system is running at full capacity