2.1 Construction Safety Standards- Electrical Safety

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Kiewitsafe

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Quizzes Created: 30 | Total Attempts: 51,714

Questions: 10 | Attempts: 2,861 | Updated: Mar 22, 2023

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2.1 Construction Safety Standards- Electrical Safety - Quiz

Electrical safety quiz covering common hazards associated with electricity on construction projects.

Questions and Answers

1.

The severity of a shock depends on what?
- A.
  
  The path of the current through your body
- B.
  
  The amount of current (amps)
- C.
  
  The duration of the shock
- D.
  
  All of the above
Correct Answer
D. All of the above

Explanation
The severity of a shock depends on all of the factors mentioned: the path of the current through your body, the amount of current (amps), and the duration of the shock. The path of the current determines which organs and tissues are affected and how deeply the shock penetrates. The amount of current flowing through the body determines the extent of damage it can cause. Finally, the duration of the shock determines how long the body is exposed to the harmful effects of the current.

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2.

An extension cord with a small cut in the outer insulation is okay to use because the internal insulation is not damaged.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
An extension cord with a small cut in the outer insulation is not okay to use, even if the internal insulation is not damaged. The outer insulation is designed to protect against physical damage, such as cuts or abrasions, which can expose the internal wiring and create a safety hazard. Even if the internal insulation is intact, a cut in the outer insulation can lead to electrical leakage, short circuits, or even electrical shock. It is important to always use extension cords that are in good condition and free from any damage to ensure safety.

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3.

Most of our heavy equipment is not insulated which means what?
- A.
  
  Damage to the equipment could be catastrophic
- B.
  
  The ground beneath the equipment may be energized
- C.
  
  You should stay in the equipment if you contact overhead power lines
- D.
  
  The only time you should exit the equipment before the line is de-energized is if the equipment catches fire
- E.
  
  All of the above
Correct Answer
E. All of the above

Explanation
Most of our heavy equipment is not insulated, which means that there is a risk of damage to the equipment in case of contact with overhead power lines. This damage could be catastrophic. Additionally, the ground beneath the equipment may be energized, posing a danger to anyone in contact with it. In such situations, it is recommended to stay inside the equipment rather than exiting, unless there is a fire. Therefore, all of the given options are correct and valid explanations of the consequences of heavy equipment not being insulated.

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4.

18 gauge wire is larger than 12 gauge wire?
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The given statement is false. In wire gauge measurements, a smaller gauge number indicates a larger wire size. Therefore, 12 gauge wire is actually larger than 18 gauge wire.

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5.

Twist lock style cord heads should be used on our projects.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
Twist lock style cord heads should be used on our projects because they provide a secure and reliable connection between the cord and the electrical device. This type of cord head ensures that the cord remains firmly attached to the device, reducing the risk of accidental disconnection. Additionally, twist lock cord heads are designed to prevent the cord from being pulled out easily, which enhances safety in the project.

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6.

What must be covered in an assured grounding program?
- A.
  
  All cords not protected by a GFCI
- B.
  
  Only equipment that could shock you
- C.
  
  Underground cords and wires
- D.
  
  Cords that run through high traffic areas
Correct Answer
A. All cords not protected by a GFCI

Explanation
An assured grounding program should cover all cords that are not protected by a Ground Fault Circuit Interrupter (GFCI). This is important because GFCIs are designed to protect against electric shock by quickly shutting off power in the event of a ground fault. Therefore, any cords that do not have this protection should be included in the program to ensure the safety of individuals using the equipment.

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7.

GFCI's measure a difference or leakage in current. The GFCI will open the circuit thus stopping the current flow when it detects a leakage of more than ___ mA?

Correct Answer
5

Explanation
GFCI's (Ground Fault Circuit Interrupters) are electrical safety devices that protect against electric shock. They work by monitoring the flow of current in a circuit and detecting any difference or leakage in the current. When a leakage of more than 5 mA is detected, the GFCI will open the circuit, interrupting the current flow and preventing potential electrical hazards.

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4
8.

When should documented testing take place for a GFCI?
- A.
  
  Daily
- B.
  
  Monthly
- C.
  
  Quarterly
- D.
  
  When something breaks
Correct Answer
B. Monthly

Explanation
Documented testing for a GFCI should take place monthly. This is because GFCIs (Ground Fault Circuit Interrupters) are electrical safety devices that protect against electric shock. Monthly testing ensures that the GFCI is functioning properly and can detect ground faults effectively. Regular testing helps identify any issues or malfunctions early on, allowing for timely repairs or replacements to maintain electrical safety.

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9.

What is the only type of cord we can use that is not 3 wire?
- A.
  
  The one that is made out of bailing wire and duct tape.
- B.
  
  Double insulated
- C.
  
  The one that we made from Christmas lights
- D.
  
  S type 18 gauge
Correct Answer
B. Double insulated

Explanation
Double insulated cords are the only type of cords that can be used that are not 3 wire. Double insulated cords have an extra layer of insulation, which provides an additional level of safety. This type of cord is commonly used in electrical appliances and tools to prevent electrical shocks and protect against potential hazards. The extra insulation acts as a barrier between the electrical conductors and the outer surface of the cord, reducing the risk of electrical accidents.

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10.

Why is it important to have a grounding conductor on all electrical cords?
- A.
  
  Helps protect the person using the cord from electrical shock
- B.
  
  Helps route current through the supplied ground instead of the person
- C.
  
  It looks way cooler than the two wire type
- D.
  
  Current will always take the path to ground with the least resistance
- E.
  
  It is a good way to protect our employees
Correct Answer(s)
A. Helps protect the person using the cord from electrical shock
B. Helps route current through the supplied ground instead of the person
D. Current will always take the path to ground with the least resistance
E. It is a good way to protect our employees

Explanation
The grounding conductor is important on all electrical cords because it helps protect the person using the cord from electrical shock. It helps route current through the supplied ground instead of the person, ensuring that any potential electrical faults are safely redirected. Additionally, current will always take the path to ground with the least resistance, and having a grounding conductor provides a low-resistance path for the current to flow. This is a good way to protect our employees and ensure their safety when using electrical cords.

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Current Version
Mar 22, 2023

Quiz Edited by
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Dec 22, 2008

Quiz Created by
Kiewitsafe

2.1 Construction Safety Standards- Electrical Safety

The severity of a shock depends on what?

An extension cord with a small cut in the outer insulation is okay to use because the internal insulation is not damaged.

Most of our heavy equipment is not insulated which means what?

18 gauge wire is larger than 12 gauge wire?

Twist lock style cord heads should be used on our projects.

What must be covered in an assured grounding program?

GFCI's measure a difference or leakage in current. The GFCI will open the circuit thus stopping the current flow when it detects a leakage of more than ___ mA?

When should documented testing take place for a GFCI?

What is the only type of cord we can use that is not 3 wire?

Why is it important to have a grounding conductor on all electrical cords?