25.  What person must approve the use of personal electrical equipment before you can use it aboard ship? 1.  The division officer 2.  The engineer officer 3.  The department head 4.  The division chief 26.  Compartments used to store compressed gas cylinders should not be allowed to rise above what maximum temperature? 1.  130ºF 2.  135ºF 3.  140ºF 4.  145ºF 27.  On noncargo ships, in what position should compressed gas cylinders be stored? 1.  Vertically, valve up 2.  Vertically, valve down 3.  Horizontally, valve up 4.  Horizontally, valve down 28.  Compartments that contain compressed gases are ventilated for what length of time if ventilation has been secured? 1. 5 minutes 2.  10 minutes 3.  15 minutes 4.  20 minutes 29.  Oxygen and chlorine cylinders may be stored in close proximity (near) to fuel or gas cylinders. 1.  True 2.  False 30.  Only trained and medically qualified personnel are authorized to remove asbestos. 1.  True 2.  False 31.  A tool is classified as power-driven if it has which of the following power sources? 1.  Pneumatic 2.  Hydraulic 3.  Electrical 4.  Each of the above 32.  Personnel assigned to a fire watch during a welding operation must remain at their location for what minimum length of time after the job is completed? 1.  10 minutes 2.  20 minutes 3.  30 minutes 4.  40 minutes 33.  When operating rotating machinery, you should never wear which of the following items? 1.  Jewelry 2.  Neckties 3.  Loose-fitting clothes 4.  All of the above 34.  Compressed air can be used to clean disassembled machinery parts provided the pressure doesn’t exceed how many pounds per square inch (psi)? 1.  30 psi 2.  45 psi 3.  60 psi 4.  75 psi 35.  Sewage wastes contain bacteria and viruses. They can enter your body through which of the following means? 1.  Your nose 2.  Your mouth 3.  Open sores 4.  All of the above 36.  You should not use liquid soaps or scented disinfectants to clean up spilled sewage for what reason? 1.  They cause too many suds 2.  They have poor cleaning characteristics 3.  They may temporarily disguise inadequate clean-up procedures 37.  You shouldn’t smoke around sewage-handling equipment for what reason? 1.  Germs found in the sewage can be inhaled 2.  Smoke adds to the odor 3.  Gases found around equipment and given off by sewage are explosive 19-37