Lubricant Properties and Grease Types

What happens to the life of a lubricant when the operating temperature increases by 10 degrees Celsius above 50°C?

In the context of grease, what does the number '2' signify in 'Grease ServoGem EP-2'?

Which statement about grease is incorrect?

Which of the following is a property of lubricant?

Which additives are commonly used in lubricants to enhance their properties?

What is the purpose of testing oil in service?

Which thickener/soap is most commonly used for greases in heavy industry applications?

What effect does an increase in temperature typically have on the viscosity of oil?

What does the viscosity index measure?

Under which operating condition are viscosity index improvers' additives typically used in lube oil?

Which additive plays a very important role at heavy loads?

What can be determined from testing oil in service?

In a cooling system, what is the name of the radiator type where water flows horizontally from one side to the other?

Which of the following correctly describes the primary role of a cooling fan in a vehicle?

To ensure effective cooling, what surrounds each cylinder in an engine?

Which statement is true regarding circulation in a thermo-syphon cooling system?

Which of the following is a main component of a radiator?

Which of the following could be a cause of poor circulation in a cooling system?

Which valve in the radiator cap opens when the coolant temperature rises and the pressure inside the radiator exceeds a predetermined level?

What is the primary function of a radiator in an engine cooling system?

Why is it important to maintain the correct coolant level in a vehicle's cooling system?

What is the role of a thermostat in an engine cooling system?

What is a common sign of a failing water pump in a vehicle?

How does the use of coolant (antifreeze) in a cooling system help protect against freezing?

If a car's temperature gauge is consistently reading higher than normal, what is a likely cause?

In what way does proper lubrication contribute to engine cooling?

What is the purpose of the expansion tank (or overflow tank) in a cooling system?

What is 'coolant cavitation' and why is it detrimental to an engine's cooling system?

What is a 'coolant flush' and why is it considered a standard preventative maintenance procedure for vehicle cooling systems?

What is the primary purpose of using distilled water rather than tap water in a vehicle's cooling system?

Why should you never open a vehicle's radiator cap while the engine is hot?

What role does the radiator cap play in maintaining the optimal operating temperature of an engine?

If you notice the engine is overheating at low speeds, but cools down at higher speeds, what is the MOST probable cause?

What is the 'Glysantin' specification, and why is it significant when selecting a coolant for a modern engine?

Suppose an engineer designed a cooling system where the coolant was replaced by a closed-loop system of highly pressurized helium gas. What principle would justify the selection of helium over traditional liquid coolants?

Consider a hypothetical situation where a race car engineer decides to introduce a cooling system that uses a phase-change material (PCM) within the engine block. What is the most critical factor they would need to consider regarding the PCM to ensure optimal performance during a race?