Question 127Steam Plants - QMED

The correct answer is C) lube oil pumps and gravity tanks. In a gravity lubricating oil system, the lube oil coolers are located between the lube oil pumps and the gravity tanks. The gravity tanks provide the initial supply of lubricating oil, which is then circulated through the system by the lube oil pumps. The lube oil coolers are installed in this section of the system to regulate the temperature of the oil before it reaches the main units that require lubrication. The other options are incorrect because: A) The lube oil sump is located downstream of the lube oil coolers, not upstream. B) The lube oil pumps are located between the lube oil sump and the lube oil coolers. D) The gravity tanks are located upstream of the lube oil coolers, not the main units.