Question 691Steam Plants - Assistant Engineer70% to pass
When the temperature of the main turbine lubricating oil is lowered, an increase will occur in the _______________.
AI Explanation
The correct answer is B) viscosity.
When the temperature of the main turbine lubricating oil is lowered, the viscosity (thickness) of the oil will increase. This is because the lower temperature causes the oil molecules to move more slowly, resulting in higher resistance to flow, or higher viscosity. The increase in viscosity is a key factor in proper lubrication and protection of the turbine's moving parts.
The other answer choices are incorrect because lowering the temperature would not directly affect the pour point (A), flash point (C), or concentration of contaminants (D) in the lubricating oil. Those properties are influenced by other factors, such as the oil's composition and the presence of impurities.
Related Questions
#689 According to the illustration, what is the normal function of the component shown? Illustration SE-0010 #690 If contaminated lube oil were allowed to settle undisturbed in a tank, into which layers would the contaminants separate? #692 In order to maintain the required lube oil temperature leaving a lube oil cooler, where an automatic bypass valve is not provided, which of the following operations is correct? #693 To assure the main propulsion turbine bearings are receiving the proper lube oil supply, you should check the _______________.#694 Which of the following types of bearings are used as line shaft bearings?