ELECTRICIAN`S MATE Quiz 12

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david11090
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232225
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ELECTRICIAN`S MATE Quiz 12
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2013-09-01 01:14:35
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ELECTRICIAN`S MATE Quiz 12
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ELECTRICIAN`S MATE Quiz 12
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  1. What is the purpose of the elapsed time meter?



    • 
    To allow operators to set the equipment to start and stop automatically

    • 
    To prevent equipment from being overused between overhauls

    • 
    To operate timed contacts at precise set points

    • 
    To keep track of the time a compressor is operated
    To keep track of the time a compressor is operated
  2. On a refrigeration system, timing relays provide what safety feature?



    • 
    Secure the refrigeration after 10 seconds if no oil pressure develops

    • 
    Prevent the unit from operating if there is no water

    • 
    Prevent overloading the refrigeration compressor

    • 
    Secure the controller if there is a loss of voltage
    Secure the refrigeration after 10 seconds if no oil pressure develops
  3. You have spilled battery acid on your arm. What is the first step you should take?



    • 
    Cover the area with boric acid powder

    • 
    Sprinkle baking soda on the area

    • 
    Wash the area thoroughly with fresh water 

    • 
    Spread a thin coating of petroleum jelly over the area
    Wash the area thoroughly with fresh water 
  4. Freeze storerooms and chill storerooms are maintained at what temperature, respectively?



    • 
    0°C and 33°C

    • 
    32°F and 40°F

    • 
    0°F and 33°F

    • 
    33°F and 0°F
    0°F and 33°F
  5. What type of controller is used on the airconditioning system?



    • 
    LVR

    • 
    LVP 

    • 
    LVCR

    • 
    LVRE
    LVP
  6. What are the three major components of a window wiper?



    • 
    Drive unit, load monitor, and wiper arm

    • 
    Control box, rectifier unit, and drive unit

    • 
    Control box, drive unit, and wiper arm

    • 
    Load monitor, drive unit, and wiper arm
    Control box, drive unit, and wiper arm
  7. The low pressure air compressor has what total number of modes of operation?



    • 
    One auto and two manual (low and high)

    • 
    Two manual (low and high) and two auto (low and high)

    • 
    Two auto (low and high) and one manual 

    • 
    One manual and three auto (low, medium, and high)
    Two auto (low and high) and one manual
  8. On an air compressor, what condition is indicated by the enable running light?



    • 
    Power is available to the compressor

    • 
    The compressor is in an operative condition

    • 
    The compressor is in the automatic mode

    • 
    The dew point is at a safe level
    The compressor is in an operative condition
  9. The suction pressure switch SP is set to (a) open and (b) close at what pressure?



    • 
    (a) 8 in.Hg (b) 5 psig

    • 
    (a) 5 in.Hg (b) 8 psig 

    • 
    (a) 5 in.Hg (b) 5 psig

    • 
    (a) 8 in.Hg (b) 8 psig
    (a) 5 in.Hg (b) 8 psig
  10. The oil pressure safety switch is designed to secure the refrigeration compressor if the oil pressure drops to what minimum value?



    • 
    22 psi

    • 
    12 psi 

    • 
    24 psi

    • 
    18 psi
    12 psi
  11. What voltage is used to operate the components of the control circuit?



    • 
    110 Vac

    • 
    120 Vac

    • 
    440 Vac

    • 
    28 Vac
    120 Vac
  12. What component compensates for temperature changes?



    • 
    Resistor R5
    • 
    Control coil L1

    • 
    Zener diode CR13

    • 
    Resistor R4
    Resistor R5
  13. What feature de-ices the window served by the wiper?



    • 
    A 36-watt heating element in the wiper arm 

    • 
    A wire-wound resistor placed in the control box

    • 
    Heaters placed on the bulkhead next to the window

    • 
    The friction of the blades on the window
    A 36-watt heating element in the wiper arm
  14. What voltage is used to operate the wiper motor?



    • 
    440 Vac

    • 
    115 Vac

    • 
    220 Vdc

    • 
    68 to 115 Vdc
    68 to 115 Vdc
  15. What compressor component operates to drain the dehydrator condensate sump?



    • 
    Control relay 16CR

    • 
    Selector switch 1SEL

    • 
    Solenoid valve SV7 

    • 
    Timing relay 3TR
    Solenoid valve SV7
  16. What action should you take to prevent a small boat motor from overheating?



    • 
    Continue the operation of the starting motor after the drive pinion engages the flywheel

    • 
    Operate the starting motor for 30-second periods at 2-minute intervals

    • 
    Operate the starting motor for a maximum of 2-minute periods at 30- second intervals

    • 
    Intermittently operate the starting motor for about 2 minutes, and, if the engine fails to start, allow the motor to cool before trying again
    Operate the starting motor for 30-second periods at 2-minute intervals
  17. What is the purpose of the heater in the control circuit?



    • 
    To keep the ambient temperature above freezing to prevent sluggish operation of the compressor

    • 
    To keep the control circuitry from freezing

    • 
    To prevent condensation from forming in the compressor motor windings

    • 
    To keep the oil of the compressor warm
    To keep the oil of the compressor warm
  18. What is the ratio of the speed of the starting motor to that of the engine?



    • 
    2 to 1

    • 
    15 to 1

    • 
    1 to 1

    • 
    150 to 1
    15 to 1
  19. On a starting motor, what causes the pull-in coil to de-energize once the solenoid switch is closed?



    • 
    The start motor terminals are opened, shorting the pull-in coil

    • 
    The holding coil closes auxiliary contacts in the start circuit

    • 
    The solenoid plunger opens the coil contacts

    • 
    The pull-in coil is shorted by the plunger disk closing the start contacts
    The start motor terminals are opened, shorting the pull-in coil
  20. What compressor component operates to allow the flow of the injection water?



    • 
    Servo valve SV1 

    • 
    Control relay 1CR

    • 
    Timing relay 6TR

    • 
    Pressure switch PS1
    Servo valve SV1
  21. What component acts to delay compressor shutdown for 10 minutes once a discharge pressure of 125 psig is reached?



    • 
    Undervoltage relay UV

    • 
    Timing relay 1TR 

    • 
    Selector switch 1SEL

    • 
    Pressure switch PS1
    Timing relay 1TR
  22. What is the purpose of timing relay TR?



    • 
    It opens after a 10-second time delay to de-energize the compressor if oil pressure has not caused oil pressure switch OP to close its contacts 

    • 
    It inserts a 10-second time delay between the time the compressor is energized and suction pressure switch SP becomes active

    • 
    It prevents short circuiting the compressor motor by inserting a time delay on start up

    • 
    It closes after a 10-second time delay to de-energize the compressor if water pressure has not caused water pressure switch W to close its contacts
    It opens after a 10-second time delay to de-energize the compressor if oil pressure has not caused oil pressure switch OP to close its contacts
  23. The tank of the ultrasonic cleaner has what total number of sections?



    • 
    Three

    • 
    Four

    • 
    One

    • 
    Two
    Two
  24. The output of the battery charger is determined by what component(s)?



    • 
    The SCRs

    • 
    Switch S3

    • 
    Resistor R4

    • 
    Switch S2
    •  Switch S2
  25. When operating in the automatic 125 setting, the compressor is set to (a) start and (b) stop at what pressure?



    • 
    (a) 110 psig falling (b) 125 psig rising

    • 
    (a) 105 psig rising (b) 120 falling

    • 
    (a) 105 psig falling (b) 120 psig rising

    • 
    (a) 110 psig rising (b) 125 psig falling

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