iRubric: Subcooling calculations rubric

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Subcooling calculations

Adjusting superheat on a Thermostatic Expansion Valve

Given an Air Conditioning system the student will use the proper tools and equipment to check the subcooling on a refrigeration system. The student will get the actual subcooling and compare to the required subcooling and determine if the system is properly charged.

Rubric Code: RX69W99

By genewcoa

Ready to use

Public Rubric

Subject: Vocational

Type: Project

Grade Levels: Undergraduate

Super heat
	Poor Below Entry Level Industry Standards 10 pts	Fair Approaching Entry Level Industry Standard 20 pts	Good Meets Entry Level Industry Standards 30 pts	Excellent Meets or Exceeds Industry Standards 40 pts
Installation of Guages	Poor Installation incorrect. At some point stops for directions. Shows No competency and needs assistance.	Fair Installation is slow and halting. Question each step for teacher confirmation. Not sure about correct order.	Good Installation of guages is done with some hesitation, but correct Minor questioning about procedures.	Excellent Installation of guages is done confidently, quickly, and with no assistance required.
Calculation of actual subcooling	Poor Student does not remember proper steps in getting the actual subcooling. Takes supervision to get to correct setting.	Fair The student has slow procedure and needs some coaching to get to correct actual subcooling	Good The student can make calculations with minimal questions or supervision. Arrives at correct reading.	Excellent The student made accurate calculations as directed with no supervision. Gets correct reading
Calculation of required subcooling	Poor Student does not remember proper steps in getting the required subcooling. Takes supervision to get to correct setting.	Fair The student has slow procedure and needs some coaching to get to correct required subcooling	Good The student can make calculations with minimal questions or supervision. Arrives at correct reading.	Excellent The student made accurate calculations as directed with no supervision. Gets correct reading
Vocabulary	Poor Student comprehends some points and cannot discuss well using the corect terminology.	Fair Comprehends major points only and can discuss relatively well with mixed terminology.	Good Comprehends the assignment and can discuss it relatively well using terminology.	Excellent Student comprehends the assignment and can discuss it well using the industry terminology.