1-62. Although  manufacturers  strive  to produce  hydraulic  liquids  that contain  no  toxic  chemicals,  some liquids  contain  chemicals  that are harmful. How do these poisonous  chemicals  enter  the body? 1. Absorption  through  the  skin 2. Through the eyes or mouth 3. Through  inhalation 4. All of the above Learning  Objective: Recognize various  types  of  hydraulic liquids  and  their  particular characteristics  and  uses. 1-63. The bases of the most common types  of  hydraulic  liquids  are classified  as 1. synthetic,  water,  or vegetable 2. water  ,    petroleum,  or synthetic 3. water ,    petroleum,  or vegetable 4. petroleum,  vegetable,  or synthetic 1-64. What is the moat widely used medium  for  hydraulic  systems? 1. Petroleum-based   liquid 2. Synthetic-based   liquid 3. Vegetable-based   liquid 4. Water-based  liquid 1-65. Which  of  the  following  properties of a hydraulic liquid can be improved by additives? 1. viscosity 2. Chemical  stability 3. Lubricating  power 4. All of the above 1-66. The  fluid  currently  being  used  in a  hydraulic  system  that  requires a  nonflammable  liquid  will probably be a 1-67. Which  of  the  following  statements is/are  true  concerning  synthetic- based  fluids? 1. They will not burn 2. They  are  compatible  with  most commonly  used  packing  and gasket  materials 3. They  may  contain  toxic chemicals 4. All of the above 1-68. You  have  accidentally  gotten  a synthetic  hydraulic  fluid  in  your eyes . You should flush your eyes for at LEAST 15 minutes and seek immediate  medical  attention. 1. True 2. False 1-69. You are required to dispose of contaminated  synthetic  fluid while deployed. HOW should you dispose of the fluid? 1. Pump it to the collecting, holding, and transfer (CHT) tank 2. Place it in drums for disposal  ashore 3. Pump it over the side 4. Dilute it with soapy water and pump it over the side 1-70. Water-based  fluids’  resistance  to fire  depends  on  the  vaporization and  smothering  effect  of  steam generated from water. 1. True 2. False 1. synthetic-based   liquid 2. blend of water and oil 3. petroleum-based   liquid 4. blend of petroleum and vegetable oil 8