Question 1
A commercial building has a total calculated building heat loss of 450,000 BTU/h. If a hydronic heating system is designed for a 20°F temperature drop (delta T), what is the required pump flow rate in gallons per minute (GPM)?
Correct Answer:
45.0 GPM
Question 2
A low-pressure steam boiler system delivers 1,200 square feet of Equivalent Direct Radiation (EDR). What is the minimum net boiler rating required in BTU/h to handle this load?
Correct Answer:
288,000 BTU/h
Question 3
When sizing a diaphragm-type expansion tank for a closed hot water hydronic system with 200 gallons of system volume operating between 60°F and 180°F, what factor dictates the required acceptance volume?
Correct Answer:
Water's thermal expansion coefficient
Question 4
Under the California Mechanical Code (CMC), what is the minimum required clearance for service access in front of the burner assembly on a commercial boiler?
Correct Answer:
36 inches
Question 5
On a mechanical piping plan, what does a schematic symbol depicting two opposing triangles touching at their apexes represent?
Correct Answer:
Gate valve
Question 1
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Prepare with the CSLB C-4 Practice Questions - California CSLB C-4 Boiler, Hot Water Heating and Steam Fitting Examination Exam practice quiz. This question bank includes 100 questions covering boiler, steam, commercial, code, and water. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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CSLB C-4 Practice Questions - California CSLB C-4 Boiler, Hot Water Heating and Steam Fitting Examination Exam

This practice set contains 100 questions from the matching question bank and focuses on boiler, steam, commercial, code, and water. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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