Programmable Logic Controllers 5th Edition By Frank Petruzella – Test Bank

1. PLCs are generally placed within an enclosure.

.TRUE

Accessibility: Keyboard Navigation

Bloom’s: Object 1. Factual

Bloom’s: Verb 1. Remember

Chapter: 13 PLC Installation Practices, Editing, and Troubleshooting

Difficulty: Easy

Gradable: automatic

Learning Objective: Describe the requirements for PLC enclosures

Section: 13.01 PLC Enclosures

Subtopic: PLC Enclosures

Topic: PLC Installation Practices, Editing, and Troubleshooting

Units: NA

2. An enclosure is used to shield the controller from electrical noise and airborne contaminants.

 

TRUE

Accessibility: Keyboard Navigation

Bloom’s: Object 1. Factual

Bloom’s: Verb 1. Remember

Chapter: 13 PLC Installation Practices, Editing, and Troubleshooting

Difficulty: Easy

Gradable: automatic

Learning Objective: Describe the requirements for PLC enclosures

Section: 13.01 PLC Enclosures

Subtopic: PLC Enclosures

Topic: PLC Installation Practices, Editing, and Troubleshooting

Units: NA

3. Most PLC installations require additional cooling provisions, not included in the original installation.

 

FALSE

Accessibility: Keyboard Navigation

Bloom’s: Object 1. Factual

Bloom’s: Verb 1. Remember

Chapter: 13 PLC Installation Practices, Editing, and Troubleshooting

Difficulty: Easy

Gradable: automatic

Learning Objective: Describe the requirements for PLC enclosures

Section: 13.01 PLC Enclosures

Subtopic: PLC Enclosures

Topic: PLC Installation Practices, Editing, and Troubleshooting

Units: NA

4. A hardwired electromechanical master control relay is not normally included as part of the wiring for a PLC system.

 

FALSE

Accessibility: Keyboard Navigation

Bloom’s: Object 1. Factual

Bloom’s: Verb 2. Understand

Chapter: 13 PLC Installation Practices, Editing, and Troubleshooting

Difficulty: Easy

Gradable: automatic

Learning Objective: Describe the requirements for PLC enclosures

Section: 13.01 PLC Enclosures

Subtopic: PLC Enclosures

Topic: PLC Installation Practices, Editing, and Troubleshooting

Units: NA

5. PLC malfunctions due to electrical noise usually produce temporary occurrences of operating errors.

 

TRUE

Accessibility: Keyboard Navigation

Bloom’s: Object 1. Factual

Bloom’s: Verb 2. Understand

Chapter: 13 PLC Installation Practices, Editing, and Troubleshooting

Difficulty: Easy

Gradable: automatic

Learning Objective: Identify and describe proper noise reduction techniques

Section: 13.02 Electrical Noise

Topic: PLC Installation Practices, Editing, and Troubleshooting

Units: NA

6. Electromagnetic interference (EMI) may enter a PLC system through radiation.

 

TRUE

Accessibility: Keyboard Navigation

Bloom’s: Object 1. Factual

Bloom’s: Verb 2. Understand

Chapter: 13 PLC Installation Practices, Editing, and Troubleshooting

Difficulty: Easy

Gradable: automatic

Learning Objective: Identify and describe proper noise reduction techniques

Section: 13.02 Electrical Noise

Subtopic: PLC Noise Reduction

Topic: PLC Installation Practices, Editing, and Troubleshooting

Units: NA

7. Common potential noise generating devices include non-inductive resistive loads.

 

FALSE

Accessibility: Keyboard Navigation

Bloom’s: Object 1. Factual

Bloom’s: Verb 2. Understand

Chapter: 13 PLC Installation Practices, Editing, and Troubleshooting

Difficulty: Easy

Gradable: automatic

Learning Objective: Identify and describe proper noise reduction techniques

Section: 13.02 Electrical Noise

Subtopic: PLC Noise Reduction

Topic: PLC Installation Practices, Editing, and Troubleshooting

Units: NA

8. A fiber optic wired control system is most susceptible to electrical noise.

 

FALSE

Accessibility: Keyboard Navigation

Bloom’s: Object 1. Factual

Bloom’s: Verb 2. Understand

Chapter: 13 PLC Installation Practices, Editing, and Troubleshooting

Difficulty: Easy

Gradable: automatic

Learning Objective: Identify and describe proper noise reduction techniques

Section: 13.02 Electrical Noise

Subtopic: PLC Noise Reduction

Topic: PLC Installation Practices, Editing, and Troubleshooting

Units: NA

9. Running signal wiring and power wiring in the same conduit helps to cut down on electrical noise.

 

FALSE

Accessibility: Keyboard Navigation

Bloom’s: Object 1. Factual

Bloom’s: Verb 2. Understand

Chapter: 13 PLC Installation Practices, Editing, and Troubleshooting

Difficulty: Easy

Gradable: automatic

Learning Objective: Identify and describe proper noise reduction techniques

Section: 13.02 Electrical Noise

Subtopic: PLC Noise Reduction

Topic: PLC Installation Practices, Editing, and Troubleshooting

Units: NA

10. Most solid-state switches will conduct a small amount of leakage current in the off state.

 

TRUE