SHI Test Prep Exam Questions & Answers 2026 (1–10)

Question 1

Which step should be performed first when commissioning a newly installed solar heating system?

TheoryPractice · Accepted Answer

Pressure test the system for leaks. Pressure testing the system is the first critical step in commissioning to ensure there are no leaks before introducing the heat transfer fluid and operating the system.

Question 2

What is the primary purpose of verifying flow rates during solar heating system commissioning?

TheoryPractice · Accepted Answer

To ensure proper heat transfer from collectors to storage. Verifying flow rates ensures proper heat transfer from the collectors to the storage tank, which is essential for system efficiency and performance.

Question 3

When programming a differential temperature controller during commissioning, what is the typical collector-to-tank temperature differential setting to activate the pump?

TheoryPractice · Accepted Answer

8-10°F. A differential of 8-10°F is typically used to activate the pump, providing enough temperature difference to ensure efficient heat transfer while preventing short cycling.

Question 4

Which document should be completed and provided to the customer during the final walk-through of a newly commissioned solar heating system?

TheoryPractice · Accepted Answer

System owner's manual with operation instructions. The system owner's manual contains essential information about operation, maintenance, and troubleshooting that the customer needs to properly use and maintain their solar heating system.

Question 5

What should an installer check when verifying sensor placement during system commissioning?

TheoryPractice · Accepted Answer

Proper contact with the surface and secure attachment. Proper contact and secure attachment ensure accurate temperature readings, which are critical for system control and performance monitoring.

Question 6

During commissioning, what is the purpose of running the circulation pump manually?

TheoryPractice · Accepted Answer

To verify proper pump operation and system circulation. Running the pump manually allows the installer to check for proper operation, unusual noises, vibration, leaks, and ensures the fluid is circulating correctly through the entire system.

Question 7

What information should be recorded on the system commissioning report?

TheoryPractice · Accepted Answer

Flow rates, pressure readings, temperature differentials, and controller settings. Flow rates, pressure readings, temperature differentials, and controller settings are all critical data points that document the system's initial performance parameters for future reference and troubleshooting.

Question 8

When should the heat transfer fluid pH be tested during the commissioning process?

TheoryPractice · Accepted Answer

After filling the system but before final operation. Testing the pH after the system is filled but before final operation ensures the fluid meets specifications and provides a baseline measurement for future maintenance checks.

Question 9

What should an installer demonstrate to the customer during the final walk-through of a solar heating system?

TheoryPractice · Accepted Answer

Controller operation, maintenance procedures, and emergency shutdown. Demonstrating controller operation, maintenance procedures, and emergency shutdown provides the customer with essential knowledge to properly operate and maintain their system.

Question 10

What is the purpose of checking the antifreeze concentration during system commissioning in cold climates?

TheoryPractice · Accepted Answer

To ensure freeze protection to the specified temperature. Checking antifreeze concentration ensures freeze protection to the specified temperature, preventing system damage during cold weather operation.

SHI Test Prep Exam Questions & Answers 2026 (1–10)

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