When placing a shell-and-tube heat exchanger with a non-removable tube bundle such as a lube oil cooler with fixed tube sheets into service, to avoid thermal shock what statement represents the correct operating procedure?

Question

Accepted Answer

Introduce both the cooling water and the lubricating oil simultaneously and gradually to avoid thermal shock.

Answer

Introduce the cooling water first, then gradually introduce the lube oil until full flow is established to avoid thermal shock.

Answer

Introduce both the cooling water and the lubricating oil simultaneously establishing full flow of both fluids immediately to avoid thermal shock.

Answer

Introduce the lubricating oil first, then gradually introduce the cooling water until full flow is established to avoid thermal shock.

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