If a sample size of quick response sprinklers were sent off for testing and passed in 2020, what year would they be due for testing again?

The correct duration for testing quick response sprinklers after their initial testing is typically set at 10 years. Since the sample passed testing in 2020, it would be due for re-testing in 2030. This aligns with the standard requirements for the maintenance and verification of fire protection equipment, ensuring that the sprinklers remain functional and meet safety standards.

In this context, a testing interval of 10 years helps to ensure that these life-saving devices maintain their efficacy and reliability, which is crucial for effective fire suppression. Therefore, the year 2030 clearly represents the proper timeline for the next round of testing.