Lubricant Quiz

What is the purpose of a lubricant according to the text?

• To increase friction between surfaces

• To separate sliding and rolling surfaces to reduce metal to metal contact

• To generate heat in mechanical systems

• To make surfaces stick together

What does the resistance of a liquid lubricant depend on?

• Its color

• Its temperature

• Its dynamic viscosity

• Its smell

What is dynamic viscosity a measure of?

• The ability of a liquid to freeze

• The internal resistance of the liquid to being stirred or sheared

• The weight of the liquid

• The ability of a liquid to evaporate

What are the SI units of dynamic viscosity?

• Newtons (N)

• Meters per second (m/s)

• Pascal seconds (Pa.s)

• Kilograms (kg)

What is dynamic viscosity a measure of?

• The color of a liquid

• The resistance of a liquid to being stirred, poured or sheared

• The temperature of a liquid

• The smell of a liquid

What is one of the purposes of a lubricant besides reducing frictional resistance and wear?

• To increase heat energy

• To carry away heat energy

• To produce solid particles

• To change the color of the metal

What is an important function of cutting lubricants used in machining metal components?

• To increase friction

• To prevent corrosion

• To reduce friction and carry away heat energy

• To change the shape of the metal

What should a lubricant not do?

• React with other substances in the working environment

• Lubricate machinery

• Prevent corrosion

• Carry away heat energy

Into how many types are lubricants broadly divided?

• Two

• Three

• Four

• Five

What are mineral oils mainly composed of?

• Oxygen and carbon

• Hydrogen and oxygen

• Hydrogen and carbon

• Nitrogen and carbon