ELECTRICIAN`S MATE Quiz 13

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david11090
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ELECTRICIAN`S MATE Quiz 13
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2013-08-31 23:56:08
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ELECTRICIAN`S MATE Quiz 13
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ELECTRICIAN`S MATE Quiz 13
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  1. What arc the two major units of the UNREP system?



    • 
    Control and monitoring

    • 
    Control and receiving

    • 
    Sending and receiving 

    • 
    Sending and control
    Sending and receiving
  2. What is the purpose of the ram tensioner?



    • 
    To prevent the highline winches from paying out too much wire

    • 
    To help the highline winch operator keep the highline tight during UNREP operations 

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    To return the empty trolley to the delivery ship

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    To keep the wire rope from tangling on the UNREP winches
    To help the highline winch operator keep the highline tight during UNREP operations
  3. What principle permits the ultrasonic cleaner to operate with very little loss of strength?



    • 
    The frequency of the sound waves

    • 
    The relative incompressibility of all liquids

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    The temperature of the cleaning medium

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    The size of sound waves
    The relative incompressibility of all liquids
  4. By what means are shaft hp readings displayed in remote areas of the ship?



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    Torque

    • 
    Repeaters only

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    Remote displays only

    • 
    Repeaters and remote displays
    Repeaters and remote displays
  5. What is the advantage of using solid-state control circuitry integrated with magnetically operated devices to regulate the speed of the series driven motor in an electric forklift?



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    Prevents damage to the control circuitry from power fluctuations

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    Allows longer battery-powered operation before recharging is needed

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    Enables the control circuitry to operate under higher current conditions

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    Enables the generator to handle heavy loads at slow speeds with large battery currents
    Enables the generator to handle heavy loads at slow speeds with large battery currents
  6. Which of the following are components of the steer motor power circuit in an electric forklift?



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    The lift pump motor and contacts of the pump relay coil (P)

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    The steering motor and contacts of the steer relay coil (S) 

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    The drive motor and its series field

    • 
    An electric motor, hoist and tilt cylinders, and a directional control value
    The steering motor and contacts of the steer relay coil (S)
  7. The capstan is designed to heave (a) what line at (b) what speed?



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    (a) 8-inch (b) 150 feet/minute

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    (a) 6-inch (b) 150 feet/minute

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    (a) 6-inch (b) 50 feet/minute

    • 
    (a) 8-inch (b) 50 feet/minute
    (a) 6-inch (b) 50 feet/minute
  8. If the power fails when the anchor and chain are being lowered, the electric brake is designed to hold what percentage of the rated load?



    • 
    250 %

    • 
    200 %

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    150 %

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    225 %
    150 %
  9. Which of the following are components of the receiving unit of the receiving ship?



    • 
    A king post, a receiving head, an elevator, a carriage return unit, and a remote control console 

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    A king post, a receiving head, an arm rotation motor, and king post winches

    • 
    An elevator, king post winches, a chain hoist, a remote control unit, and an arms rotation motor

    • 
    A chain hoist, worm gear, arm rotation motor, and king post winches
    A king post, a receiving head, an elevator, a carriage return unit, and a remote control console
  10. The rudders have a maximum working angle of what number of degrees (a) left and (b) right from the middle ship’s position?



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    (a) 35 (b) 38

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    (a) 38 (b) 38

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    (a) 38 (b) 35

    • 
    (a) 35 (b) 35
    (a) 35 (b) 35
  11. In a forklift, thermal switches serve to protect the drive and steer motor circuits by opening if what minimum motor frame temperature is reached?



    • 
    225°F 

    • 
    245°F

    • 
    250°F

    • 
    230°F
    225°F
  12. Where is the ship’s control console located?



    • 
    The main engineering space

    • 
    The auxiliary control room

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    The pilothouse

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    The after steering room
    •  The after steering room
  13. What is the purpose of the shaft torsion meter system?



    • 
    To determine the optimum screw blade angle for maximum efficiency

    • 
    To prevent the shaft from being overstressed

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    To measure the torque on the propulsion shaft 

    • 
    To allow precise shaft speeds to be maintained
    To measure the torque on the propulsion shaft
  14. What safety feature is incorporated into a precipitator to prevent electrical shock to the operator?



    • 
    The surge limiting resistor

    • 
    The access cover safety switch

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    The secondary is grounded

    • 
    The primary is fused
    The access cover safety switch
  15. Which of the following is the purpose of the sensing heads mounted up and down the elevator trunk?



    • 
    To slow and stop the elevator

    • 
    To prevent the elevator from overspeeding

    • 
    To prevent overtravel

    • 
    Each of the above
    Each of the above
  16. The functions performed in electric elevators by limit switches, relays, and contractors are performed in electronically controlled elevators by what component(s)?



    • 
    The motor controller

    • 
    The static logic panel

    • 
    The cam targets

    • 
    The sensing heads
    The static logic panel
  17. The functions performed in electric elevators by limit switches, relays, and contractors are performed in electronically controlled elevators by what component(s)?



    • 
    The motor controller

    • 
    The static logic panel 

    • 
    The cam targets

    • 
    The sensing heads
    The static logic panel
  18. What elevator component slows the elevator once it reaches the desired level?



    • 
    The reduction gear coupling disengages

    • 
    The limit switches insert resistance in the motor circuit

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    A cam-operated limit switch switches the motor to a lower speed just before the desired level 

    • 
    The photo sensors engage the brake
    A cam-operated limit switch switches the motor to a lower speed just before the desired level
  19. In electrohydraulic elevators, speed changes are accomplished by what means?



    • 
    Altering the hydraulic oil pressure to the pump

    • 
    Using a variable resistor in the control circuit

    • 
    Varying the stroke of the hydraulic pump

    • 
    Altering the reduction gear coupling ratio
    Varying the stroke of the hydraulic pump
  20. What advantage, if any, is gained by using a dc motor as the pilot motor?



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    The dc pilot motor operation is economical

    • 
    The dc pilot motor is simple to operate and requires little maintenance

    • 
    The dc pilot motor makes an infinite number of platform speeds available, which range from 3 to 90 feet per minute

    • 
    None
    The dc pilot motor makes an infinite number of platform speeds available, which range from 3 to 90 feet per minute
  21. What is the purpose of the controlled torque coupling?



    • 
    To prevent excessive stresses when the anchor is being housed

    • 
    To disconnect the windlass motor from power if there is an overload

    • 
    To control the speed of the windlass when dropping anchor

    • 
    To ensure constant torque on the gypsy head
    To prevent excessive stresses when the anchor is being housed
  22. What principle is the basis for the operation of the vent fog precipitator?



    • 
    The inversion square law

    • 
    Kirchoff’s law

    • 
    Ohm’s law

    • 
    Electrostatic precipitation
    Electrostatic precipitation
  23. The magnetic brakes of the electric anchor windlass provide what safety feature?



    • 
    Remote operation of the brake

    • 
    A positive engagement/disengagement of the reduction gears 

    • 
    Prevent overspeed

    • 
    Hold the load if power fails
    A positive engagement/disengagement of the reduction gears
  24. If an elevator platform overtravels in the down direction, which of the following devices helps to prevent damage to the platform and the hull?



    • 
    Spring bumpers 

    • 
    Electric brakes

    • 
    Safety clamps

    • 
    All of the above
    Spring bumpers
  25. Which of the following means can be used to control the operation of the steering gear?



    • 
    Hand electric

    • 
    Autopilot

    • 
    Emergency control

    • 
    Each of the above
    Each of the above

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