39.   When using binoculars, what adjustments should you make? 1.   One for focus 2.   Two for focus and one for proper distance between the lenses 3.   One for proper distance between the lenses 4.   Two for eyepiece and lens 40.   When should you use binoculars? 1.   In foggy and rainy conditions 2.   When identifying objects at night 3.   When scanning sectors in the daytime 4.   Both 2 and 3 above 41.   How long does it take for you to reach your best night vision? 1.   10 minutes 2.   15 minutes 3.   25 minutes 4.   30 minutes 42.   What is meant by the term dark adaptation? 1.   The improvement of vision in dim light 2.   The inability to see in bright light 3.   The red light requirement 4.   Shadows that can’t be seen clearly 43.   When should you use “off-center vision”? 1.   Below decks 2.   When wearing glasses 3.   When it’s dark 4.   In broad daylight 44.   What information is contained in an initial report? 1.   The object only 2.   The object’s bearing from the ship only 3.   The object and its bearing from the ship 4.   What the object might be 45.   To report serial number 23NCI16 over the sound-powered telephone circuit, you would report the serial number in what way? 1.   Too, three, november, charlie, india, wun, six 2.   Too, tree, november, charlie, india, wun, six 3.   Two, tree, november, charlie, india, wun, six 4.   Two, tree, november, charlie, india, wun, sics 46.   It’s important for you to remember that the mouthpiece and earpiece of sound-powered telephones are interchangeable for which of the following reasons? 1.   Two people can talk at once 2.   They can be interchanged if a piece breaks 3.   Undesirable noises can be fed into the system 4.   Both 2 and 3 above 47.   The headset of sound-powered telephones is picked up as a unit for which of the following reasons? 1.   To make sure you have all the parts 2.   To avoid breaking them 3.   Both 1 and 2 above 4    In case the earpiece is missing 48.   When using the mouthpiece of a sound-powered phone set to report contacts, how far from your mouth should you position the mouthpiece? 1. 1/2 to 1 inch 2. 1      to 2 inches 3. 2      to 3 inches 4. 3      to 4 inches 49.   Why should you unplug a phone’s headset when it’s not in use? 1.   To keep the user costs down 2.   Earpieces will pick up noise and transmit it over the circuit 3.   Carbon will build up at the connectors 4.   Calls from other circuits won’t go through 50.   Aboard ship, there are how many categories of shipboard sound-powered phone circuits? 1.   One 2.   Two 3.   Three 4.   Four 51.   What category of shipboard telephone circuits is designed to maintain vital communications and are preceded by the letter X? 1.   Primary system 2.   Auxiliary system 3.   Supplementary system 4.  Command circuit 10