OMG-OCSMP-MBI300 Exam - Topic 7 Question 78 Discussion

Actual exam question for OMG's OMG-OCSMP-MBI300 exam

Question #: 78
Topic #: 7

Choose the correct answer.

A system engineer has created the following model of a tank system composed of two tanks and a pipe connecting them:

The system engineer wants to mathematically relate the flow of water through the pipe using the following mass conservation equation: Tank_System wFlowin flowRate * Tank_System pipe endA_Area = Tank_System wFlowOut flowRate * Tank_System pipe endB_Area How would the system engineer model this in SysML?

ACreate a block to represent the mass conservation equation, use it in Tank_System. and relate its properties to the properties of wFlowin. wFlowOut. and pipe

BCreate a constraint block to represent the mass conservation equation, use it in Tank_System. and relate its parameters to the properties of wFiowin. wFlowOut. and pipe

CCreate a constraint block to represent each of wFlowin wFlowOut and the mass conservation equation; use these constraint blocks In Tank_System. and relate their parameters to the properties of pipe.

DCreate two flow properties for Tank_System (equivalent to wFlowin and wFlowOut); create a constraint block for the mass conservation equation and use it in Tank_System. and then relate the flow properties to the new constraint property.

EIt is not possible to model this because wFlowin and wFlowOut are item properties and not flow properties

Show Suggested Answer

Suggested Answer: C

by Wava at Jan 05, 2026, 05:16 AM

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Johnathon

3 days ago

Haha, option E is just ridiculous. Of course you can model this in SysML, it's not rocket science!

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Hayley

8 days ago

I'm not sure about that. Option D looks like it might be a better approach, with the flow properties and constraint block.

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Alyce

13 days ago

Option B seems like the way to go. Constraint blocks are perfect for modeling equations like this.

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Janine

18 days ago

I feel like creating two flow properties and then a constraint block for the mass conservation equation could be the right approach, but I can't recall if that's how we did it in practice.

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Helene

23 days ago

I'm a bit confused about whether wFlowin and wFlowOut are considered flow properties or item properties. I think that might affect which option is correct.

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Helaine

29 days ago

I remember practicing a similar question where we had to relate flow properties in SysML. I feel like option B makes the most sense for this one.

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Herminia

1 month ago

I think the mass conservation equation should be modeled as a constraint block, but I'm not sure if it should be related to wFlowin and wFlowOut directly.

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Gianna

1 month ago

This seems straightforward enough. I think option B is the way to go - create a constraint block for the mass conservation equation and relate it to the system properties. That way, I can clearly capture the mathematical relationship between the flow rates and pipe areas.

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Novella

1 month ago

I'm not totally sure about this one. The question seems a bit tricky, and I'm not 100% confident in my understanding of how to model this type of system in SysML. I might need to do some quick review of SysML constraint blocks before answering.

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Percy

2 months ago

Okay, I think I've got this. The key is to recognize that the mass conservation equation is a constraint that needs to be modeled in SysML. Option B seems like the best approach, since it allows me to create a dedicated constraint block and relate it to the relevant system properties.

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Tequila

2 months ago

Hmm, I'm a bit confused by the wording of the question. It's not totally clear to me how the mass conservation equation relates to the properties of the system. I might need to re-read the question a few times to make sure I understand it properly.

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Lili

2 months ago

This looks like a pretty straightforward SysML modeling question. I think I'll go with option B - create a constraint block to represent the mass conservation equation and relate its parameters to the properties of the system.

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