TUNE YOUR LOOP: Questions to keep you sharp.

1. Which of the following Safety PLC architectures is the best to be used in Safety Instrumented Burner Management System Applications:

Tune Your Loop is a series of posts consisting of questions from ISA Training Courses.

[ordered_list style=”lower-alpha”]
  1. 1oo1D SIL 3 certified Safety PLC
  2. 1oo2D SIL 3 certified Safety PLC
  3. 2oo4 SIL 3 certified Safety PLC
  4. 1oo2D SIL 2 certified Safety PLC
  5. Depends on SIL requirements and Lifecycle Costs[/ordered_list]

2. Which codes / standards are being revised and / or already invoke the concepts of a
Safety Instrumented Systems associated with Burner Management Systems:

[ordered_list style=”lower-alpha”]
  1. NFPA 86
  2. API 556
  3. FM 7605
  4. EN50156-1
  5. All of the above[/ordered_list]

3. To determine if a Burner Management System is a Safety Instrumented System one

must:

[ordered_list style=”lower-alpha”]
  1. Perform Risk Analysis
  2. Perform Safety Instrumented Function Identification
  3. Allocate Independent Layers of Protection
  4. Perform Safety Integrity Level Selection
  5. All of the above[/ordered_list]

4. The following statement in a client’s specification is sufficient to design a Safety
Instrumented Burner Management System.

[ordered_list style=”lower-alpha”]
  1. BMS to be supplied to meet SIL 3
  2. BMS to be supplied to meet SIL 2
  3. BMS to be supplied to meet SIL 1
  4. BMS to be supplied to have Safe Failure Fraction of > 95%
  5. None of the above[/ordered_list]

5. A general purpose PLC can be used as the logic solver in a Safety Instrumented
Burner Management System:

[ordered_list style=”lower-alpha”]
  1. If a SIL of 2 or higher is a required a formal assessment must be completed
    per IEC 61511
  2. If a SIL of 2 or higher is required without any additional engineering
  3. In SIL 1 applications following the requirements of proven-in-use
  4. Only if the control system vendor supports the concept
  5. A & C[/ordered_list]

 

What are your answers before you read ahead?

1. e

2. e

3. e

4. e

5. e

 

From the ISA Course Safety Instrumented Burner Management Systems: A How To Primer (ES17PC) pre-instructional survey.

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