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Assignment 2-Cont. - 14100_407
Assignment 2-Cont. - 14100_409

Fire Controlman Volume 03-Digital Data Systems
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2-42. To protect from accidental activation of selected keys and switches, what device is used with selected keys and switches? 1.  Horn 2.   Guard 3. Circuit breaker 4.  Light-emitting  diode 2-43. Switches have which of the following functions? 1.  To  activate  a  function 2. To turn a unit on/off 3. To set a parameter 4. Each of the above 2-44. A key switch you depress to activate a function 2-45. 2-46. and depress again to deactivate the function is called a/an 1.  momentary-action  key  switch 2.  alternate-action  key  switch 3.  three-position  key  switch 4. on/off key switch A key that repeats the function continuously while being held down is which of the following types of keys? 1. Momentary-action key 2. Alternate-action key 3.  Toggle  key 4.  On/off  key Switches that have several positions the operator can select by turning a knob are which of the following types of switches? 1. Rotary switches 2. Pushbutton switches 3.  Alternate-action  toggle  switches 4.  Momentary-action  toggle  switches 2-47. All of the following are characteristics of thumbwheel switches except which one? 1. They have alphanumeric characters built in 2. Each position is locked until another position is  selected 3. The position values are usually marked on the controlling  unit  cover 4. The positions are selected by dialing the switch 2-48. Pushbutton switches may not have indicators. 1.  True 2.   False 2-49. On toggle switches, which of the following can be 2-50. 2-51. 2-52. a use of the neutral position? 1. To interact with software 2. To set a parameter 3. To disable a locked up/down position 4. All of the above Alternate-action toggle switches may have which of the following positions? 1. Permanent up and return to neutral only 2.  Permanent  up  and  down  only 3. Either permanent up and return to neutral or permanent up and down, depending on design 4.  On  and  off Momentary-action/contact,  two-position  toggle switches are normally used for which of the following purposes? 1. To turn the unit on 2.  To  initiate  an  operation 3.  To  provide  status  information 4. To turn the unit off On a three-position toggle switch, the center position may be used for which of the following purposes? 1. To set a parameter only 2. To disable the locked up/down position only 3. Either to set a parameter or to disable the locked up/down position, depending on the function 4.  To  provide  status  information 12






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