Millwright – Lubrication Questions and Answers 100% Pass

Millwright – Lubrication Questions and Answers 100% Pass 1. What type of oil or grease would be used in a heavy load situation? a. Synthetic oil b. Extreme pressure lubricant c. Mineral oil d. Any hydraulic fluid b. Extreme pressure lubricant 2. The most common measurement of kinematic viscosity is what? a. Viscosity b. Centistokes c. Viscosity index d. Flash point b. Centistokes 3. When grease moves in a bearing, it tends to shear. This is known as: a. Pour point b. Viscosity index c. Directional fluidity d. Shear point c. Directional fluidity 4. What type of lubricant is used under shock load conditions? a. Light oil b. EP lubricant c. Extra pressure lubricant d. Synthetic oils b. EP lubricant 5. Viscosity is defined as which of the following? a. Lubricant is thick b. Measurement of a fluid's resistance to flow c. Measure of a lubricants heat capacity d. The lowest temperature an oil will flow b. Measurement of a fluid's resistance to flow 6. A grease lubricant soluble in water is which of the following? a. Sodium b. Lithium c. Magnesium d. All oils and grease are soluble in water a. Sodium 7. How many cubic inches are in 1 US gallon? a. 213 b. 321 c. 231 d. 100 c. 231 8. What does 1 cubic foot of oil weigh? a. 68lbs b. Between 45 and 49lbs c. Between 55 and 58 lbs d. 85lbs c. Between 55 and 58 lbs 9. What happens to a fluid when it vaporizes? a. It explodes b. It burns c. It oxidizes d. It implodes d. It implodes 10. What is detergent in oil used for? a. It keeps the internal parts of a system clean b. It improves viscosity c. It helps lubricate cylinder wipers d. It improves filtration if you have used to large of a filter a. It keeps the internal parts of a system clean 11. What is aeration in reference to oils? a. When oil is air entrained b. When oil has oxygen bubbles added by the manufacturer c. When the oil is boiling d. When EP oil cools down a. When oil is air entrained 12. How much pressure does the weight of 1 cubic foot of oil generate? a. 1 psi b. 4 psi c. 14 psi d. 0.4 psi d. 0.4 psi 13. What is laminar flow? a. Oil flowing in circles b. Oil flowing in a smooth flow pattern c. Oil that has detergent added d. Oil moving in an erratic fashion b. Oil flowing in a smooth flow pattern 14. What is Bernoulli's principal? a. If flow is constant, the sum of kinetic and potential energy is constant b. Pressure applied to a fluid at rest will result in even pressure at right angles to the containing surface c. Energy cannot be created or destroyed, but may change form d. Oil can change flow rate, based on temperature a. If flow is constant, the sum of kinetic and potential energy is constant 15. What are the three types of friction? a. Fluid, scraping, rolling b. Sliding, pulling, pushing c. Rolling, pulling, pushing d. Fluid, rolling, sliding d. Fluid, rolling, sliding 16. What is mist lubrication used for? a. High speed bearings and high velocity roller chain b. Internal pump parts c. To conserve oil usage d. Any situation a. High speed bearings and high velocity roller chain 17. What is pour point? a. The highest temperature at which oil freezes b. The temperature at which oil breaks down c. The lowest temperature at which oil will flow d. The temperature at which vapors will burn c. The lowest temperature at which oil will flow 18. How are gearboxes lubricated? a. Grease b. Air entrained oil c. Splash method d. Mist method c. Splash method 19. When pressure is applied to fluid at rest, force is transmitted equally in all directions at right angles to the containing surface. This is known as? a. Bernoulli's principal b. Pascal's law c. Charles law d. Boyles law b. Pascal's law 20. What is the best lubrication condition? a. Splash b. Mist c. Oil and grease d. Full film d. Full film 21. What type of gear oil is used for high heat and heavy loads? a. Lithium b. H 32 hydraulic oil c. Sodium d. EP d. EP 22. What type of lubricant to use if gears in a gearbox are wearing? a. EP Grease b. Low viscosity airline oil c. EP oil d. White Lithium c. EP oil 23. What type of testing is performed on oil to check for metallic contaminants? a. Spectograph b. Magnetic test c. Flash point analysis d. continuity a. Spectograph