Which item is NOT among the four Pre-Service tests?

• A. Hydrostatic Test
• B. Purchase Acceptance Test
• C. Manufacturer's Road Test
• D. Operational Readiness Test

Answer: (D)

Pre-Service testing for a Mobile Water Supply unit focuses on validating hardware integrity, meeting specifications, and basic operability before the system goes into service. A hydrostatic test checks the tank and piping for leaks and structural weaknesses by applying pressurized water, ensuring the system can withstand the pressures it will encounter in operation. A purchase acceptance test confirms that the delivered unit matches the purchase order and all specified components and features work as intended before formal acceptance. A manufacturer's road test evaluates the vehicle and its equipment on actual road conditions, verifying roadworthiness and functional performance prior to delivery. The item not among these pre-service checks is the operational readiness test, which is conducted after delivery to verify the system and crew can operate effectively in real-world field conditions.