101 · Question #421
Which three of the following are some of the methods that F5 uses with its environmental stress screening chamber? (Choose three.)
The correct answer is A. Varying the voltage from extreme high to extreme low. B. Running a product 300 to 500 times on each cycle. D. Alternate temperature from -5 degrees Celsius to 60 degrees Celsius.. F5's environmental stress screening chamber tests hardware reliability by cycling voltage extremes, running hundreds of operational cycles per unit, and alternating between temperature extremes to expose latent defects before shipment.
Question
Which three of the following are some of the methods that F5 uses with its environmental stress screening chamber? (Choose three.)
Options
- AVarying the voltage from extreme high to extreme low.
- BRunning a product 300 to 500 times on each cycle.
- CRepairing failed components until they function properly.
- DAlternate temperature from -5 degrees Celsius to 60 degrees Celsius.
- EEnsuring continual functioning through fire or flooding conditions.
How the community answered
(52 responses)- A88% (46)
- C4% (2)
- E8% (4)
Why each option
F5's environmental stress screening chamber tests hardware reliability by cycling voltage extremes, running hundreds of operational cycles per unit, and alternating between temperature extremes to expose latent defects before shipment.
Varying voltage between extreme high and low levels electrically stresses components to surface latent defects; running each unit through 300 to 500 cycles provides statistical confidence in long-term field reliability; and alternating temperature between -5 and 60 degrees Celsius induces thermal expansion and contraction that mirrors real-world operating conditions and reveals marginal solder joints or components.
Environmental stress screening is designed to identify and discard defective units before shipment, not to repair failed components and reintroduce them into the finished product.
Resistance to fire or flooding is governed by separate physical safety and environmental protection standards; the ESS chamber focuses exclusively on electrical and thermal stress, not disaster or hazard scenarios.
Concept tested: F5 hardware environmental stress screening chamber methods
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