Question 143Steam Plants - QMED

The correct answer is C) loss of oil flow across one of the bearings. When there is a sudden increase in pressure in a forced lubrication system, it typically indicates a restriction or blockage in the system, which can lead to a loss of oil flow across one of the bearings. This increased pressure is the system's way of compensating for the reduced flow, and checking for a loss of oil flow across the bearings is the appropriate course of action. The other options are incorrect because: A) a clogged lube oil pump suction would not cause a sudden increase in pressure, B) a high lube oil sump level would not directly cause a pressure increase, and D) a ruptured tube in the lube oil cooler would more likely result in a decrease in pressure rather than an increase.