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Assignment 7, Continued - 14241_273
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Assignment 7, Continued - 14241_275
7-18.  Acetylene,  which  is  inherently unstable,  may  explode  when  subjected to  which  of  the  following  conditions? 1. Moderate weather 2. Contact with chlorine, copper, silver,  or  mercury 3. Storage in a cylinder in the horizontal  position 4. Extreme cold 7-19.  Which  of  the  following  substances should be used to test for leaks from an  acetylene  cylinder? 1. Grease 2.  Alcohol 3. Soapy water 4.  Distilled  water 7-20.  For  what  reason  are  acetylene cylinders  stored  in  an  upright postition with the valve end up? 1. To prevent acetone from flowing into the valve 2. To assure that the acetone will remain in the valve 3. To prevent the buildup of static electricity 4. To protect them from sparks and lightning 7-21.  Oxygen  and  chlorine  gases  because  they can burn without air and strongly support  combustion  should  be  stored  in which  of  the  following  locations? 1. On the weather deck 2.  In  a  separate  watertight  storeroom that has at least one compartment between it and any space used to store  combustibles 3. Both 1 and 2 above 4. In a separate storeroom that has a sprinkler system and is in an out-of-the-way  location  that  can  be easily  isolated 7-22. Nonflammable gases such as helium, nitrogen,  carbon  dioxide,  and  argon may be stored in which of the following   locations? 1. Below deck in watertight storerooms 2. On the weather deck along with flammable  or  oxidizing  gases 3. In any space aboard ship that is sufficiently  enclosed  to  prevent ventilation 4. In any passageway inside the skin of the ship 7-23. Which of the following characteristics  may  be  attributed  to aerosol  products? 1. Aerosol cylinders will burst if exposed to heat sources in excess of 120°F 2. Aerosol cylinders are prone to leakage if subjected to impact, and  propellants  used  are  extremely flammable 3.  Aerosol  contents,  in  sufficient concentrations,  can  be  anesthetic or  asphyxiating 4. All of the above 7-24. What is the flash point of (a) flammable  liquids  and  (b)  combustible liquids,  greases,  and  pastes? 1. (a) 100°F or below; below 2. (a) Above 100°F; (b) 3. (a) 200°F or below; below 4. (a) Above 200°F; (b) 7-25. Which of the following (b) 200°F or above 200°F (b) 100°F or above  200°F materials  may be stored in racks on the weather deck? 1. Drums of paint and thinners 2. Drums of alcohol, acetone, and ether 3. Drums of chemicals 4. Drummed petroleum products as per Naval  Ships’   Technical Manual, chapter  670 50

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