What is the difference between a leak test and an operational test?

What is the difference between a leak test and an operational test?

• A. Leak test checks for gas leaks; operational test confirms proper function after installation or repair.
• B. Leak test verifies the timing of operation; operational test checks for leaks.
• C. Leak test detects electrical faults; operational test checks for leaks.
• D. Leak test is optional; operational test is mandatory.

Answer: (A)