1. Hydraulic oil is compressible:

  1. not at all
  2. by a great amount
  3. by a small amount

2. Viscosity is a measure of the hydraulic fluids:

  1. color
  2. temperature
  3. thickness

3. Synthetic fluids:

  1. cost more than mineral based fluids
  2. will not burn
  3. are compatible with most seal materials

4. The main purpose for hydraulic fluids is:

  1. to fill the tank
  2. to leak from every opening
  3. transmit energy, lubricate and seal

5. Over heating hydraulic fluid:

  1. makes it last longer
  2. deteriorates the additives
  3. makes it smell better

6. New hydraulic oil is clean to:

  1. 5 microns
  2. 10 microns
  3. 25 microns

7. Viscosity Index is a measurement of the change of flow characteristics of a fluid from one temperature another.

  1. True
  2. False

8. Hydraulic fluid should be stored:

  1. in a damp moist atmosphere
  2. in a closed and sealed container
  3. in an open container

9. A high viscosity number gives:

  1. better sealing characteristics
  2. poorer sealing characteristics
  3. has no effect on sealing characteristics

10. Refined mineral oil has:

  1. excellent lubricating qualities
  2. good lubricating qualities
  3. poor lubricating qualities
Notes: