SHI Test Prep Exam Questions & Answers 2026 (11–20)

Question 1

Which safety feature should be verified during the commissioning of a pressurized glycol solar heating system?

TheoryPractice · Accepted Answer

Pressure relief valve operation. Pressure relief valve operation is critical to verify during commissioning as it protects the system from potentially dangerous over-pressure conditions.

Question 2

What should be checked when verifying controller operation during system commissioning?

TheoryPractice · Accepted Answer

Sensor readings, differential settings, and pump activation. Sensor readings, differential settings, and pump activation are all critical controller functions that ensure the system operates efficiently and safely.

Question 3

When commissioning a solar water heating system, how can an installer verify that the collector loop is free of air?

TheoryPractice · Accepted Answer

By monitoring pressure gauge stability during operation. Monitoring pressure gauge stability indicates that air has been properly purged from the system, which is essential for efficient heat transfer and pump operation.

Question 4

What documentation should be submitted to local authorities after commissioning a solar heating system?

TheoryPractice · Accepted Answer

Completed permit documents and inspection request forms. Completed permit documents and inspection request forms are typically required by local authorities to verify code compliance and close out the permitting process.

Question 5

When is the appropriate time to remove warning tags and labels during the commissioning process?

TheoryPractice · Accepted Answer

After all testing is complete and the system is fully operational. Warning tags and labels should only be removed after all testing is complete and the system is fully operational to ensure safety throughout the commissioning process.

Question 6

What is a critical check when commissioning a drain-back solar heating system?

TheoryPractice · Accepted Answer

Verify complete drainage of collectors when the pump stops. Verifying complete drainage when the pump stops is essential for drain-back systems to prevent freezing damage during cold weather.

Question 7

During the final walk-through with the customer, what information should be provided regarding system maintenance?

TheoryPractice · Accepted Answer

A maintenance schedule with specific tasks and their frequency. A maintenance schedule with specific tasks and their frequency gives customers clear guidance on how to properly maintain their system for optimal performance and longevity.

Question 8

What should be verified about system labeling during commissioning?

TheoryPractice · Accepted Answer

Required labels for system identification, fluid type, and emergency procedures are permanently affixed and visible. Required labels for system identification, fluid type, and emergency procedures must be permanently affixed and visible for safety and maintenance purposes.

Question 9

What test should be performed to verify the high-limit function of a solar controller during commissioning?

TheoryPractice · Accepted Answer

Artificially increase the temperature sensor reading to verify pump deactivation. Artificially increasing the temperature sensor reading tests whether the high-limit function properly deactivates the pump to prevent overheating.

Question 10

What performance verification should be documented during the commissioning of a solar water heating system?

TheoryPractice · Accepted Answer

Temperature rise in the storage tank during sunny conditions. Documenting temperature rise in the storage tank during sunny conditions provides evidence of proper system operation and heat transfer.

SHI Test Prep Exam Questions & Answers 2026 (11–20)

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