When shifting heat exchangers such as main engine lube oil coolers, what statement represents the recommended operating procedure if the shift is to occur during engine operation?

Question

Accepted Answer

First, introduce cooling water to the on-coming cooler, then introduce lube oil to the on- coming cooler. Next, secure lube oil to the off-going cooler, then secure cooling water to the off- going cooler.

Answer

First, secure cooling water to the off-going cooler, then secure lube oil to the off-going cooler. Next, introduce lube oil to the on-coming cooler, then introduce cooling water to the on-coming cooler.

Answer

First, introduce lube oil to the on-coming cooler, then introduce cooling water to the on-coming cooler. Next, secure cooling water to the off-going cooler, then secure lube oil to the off-going cooler.

Answer

First, secure lube oil to the off-going cooler, then secure cooling water to the off-going cooler. Next, introduce cooling water to the on-coming cooler, then introduce lube oil to the on-coming cooler.