Define cold soaked?

• A. -30c for 8 hours
• B. -40c for 4 hours
• C. -25c for 12 hours
• D. -35c for 6 hours

Answer: (A)

Cold soak means exposing the equipment to a very low ambient temperature for a set period so its temperature reaches a defined cold level before testing. This simulates starting and operating conditions after storage in cold environments, where battery performance, oil viscosity, and fuel temperature all change.

The specified combination of -30°C for 8 hours is used because it provides enough cooling to reveal how systems behave when cold while keeping the test reproducible and safe. It ensures that components like batteries and lubricants experience conditions that could affect start-up and operation, giving a clear, consistent baseline for evaluation.

Other temperature-time pairings would either push conditions too far or not cold enough to meet the standard test requirements, so they don’t fit the defined cold soak scenario used here.