PEC - Random Questions 1

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305005
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PEC - Random Questions 1
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2015-07-09 11:38:49
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PEC Random Questions
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  1. ________type-boilers
    shall be supplied only from a 3
    phase, 4wire solidly grounded wye system, or from isolating transformersarranged to provide such a system
    ( Electrode – type boilers)
  2. Control
    circuit voltagesshall not exceed ________
    Volts, shall be supplied from a
    grounded system, and shall have the controls in the ungrounded conductor
    250  VOLTS
  3. Branch-Circuit Requirements. Each boiler shall
    be supplied from anIndividual branch
    circuit rated not less than _______ percent of  the total load
    100 Percent
  4. _________
    protection shall be provided in Each
    phase, consisting of a separate phase overcurrent relay connected to a
    separate current transformer in the phase
    Phase Fault Protection
  5. Section 4.90.5
    Electrode-Type Boiler. (Ground
    Current Detection). Means shall provided for detection of the sum of the neutral and ground
    currents and shall trip the circuit interrupting device if the sum of those currents exceeds the greater of 5 amperes or 7 ½ percent of the boiler  full load current for 10 seconds or
    exceeds an instantaneous value of ________ percent of the boiler full load current
    25 percent
  6. Motors
    driving single or multiple dc
    generators supplying a system operating on a ________ load basis do not require overload protection,
    provided that the thermal rating of the AC drive motor cannot be exceeded under
    any operating condition
    Cyclic Load
  7. Section 4.90.3.12
    Location of Devices. Control and Instruments transfer switch handles or push buttons shall
    be in a readily accessible
    location at an elevation of not over ___ mm
    1900mm
  8. (Exception): Operating Handles
    required more than 22 kg of force
    shall be located no higher _______mm in either the open or closed position
    1600mm
  9. Section 4.90.3.11
    Inspection of Windows. Windows intended for inspection of disconnecting means or switches and
    other devices shall be of suitable ________ material
    Transparent Material
  10. Section 4.90.3.9 Door
    stops and Cover Plates. External hinged doors at cover shall be provided with stops to hold them in the open
    position. Cover plates intended to be removed for inspection of energized parts
    or wiring shall be equipped with lifting handled and shall not exceed 1.2m²
    in area or _____ kg in weight unless they are hinged and bolted or locked
    27kg
  11. Section 4.90.3.9 Door
    stops and Cover Plates. External hinged doors at cover shall be provided with _____  to hold them in the open position
    STOPS
  12. (Location). Cutouts shall be
    located so that they will bereadily and
    safely accessible for
    refusing with the top of the cut out not over _______ mm above the floor or
    platform
    1500mm
  13. Section 4.90.22
    Isolating Means. Means shall be provided to completely isolate an item of equipment.
    The use of ________ switches shall not be required where there are other ways of de-energizing the equipment for
    inspection and repairs, such as draw out-type metal-enclosed switchgear
    units and removal track panels
    Isolating Switches
  14. (Interrupting  Rating). The interrupting rating of Distribution cut outs shall not
    be less than the maximum ________ current the cutout will be required to
    interrupt including contributions from all connected source of energy
    Max. Fault current
  15. Metal-Enclosed Switchgear and Substation thatUtilize High-Voltage fuses shall be provided with a gang-operated ________ switch
    Disconnecting Switch
  16. Part 4.90.2 Equipment – Specific Provisions (b) Power fuses
    and  Fuses holders . where fuses are
    use to protect conductors and equipment a fuse shall be placed in each
    underground conductor. Two power
    fuses shall be permitted to be use in parallel to protect the same load,
    if both fuses have _______ ratings, and 
    both fuses are installed in an identified common mounting with
    electrical connections that will divided the current equally
    Identical Ratings
  17. Article
    4.90-Equipment, Over 600 Volts, Nominal Power fuses and Fuses holders. 3 )
    Voltage rating. The maximum voltage rating of power fuses shall not be less than the
    maximum ________ voltage. Fuses having a minimum recommended operating voltage
    shall not be applied below this voltage
    Max. Circuit Voltage
  18. Section 4.70.1.3
    Space Separation. A thermal barrier shall be required if the space between the Resistor and Reactor and any combustible
    material is less than _______mm
    300mm
  19. Section 4.70.1.4
    Conductor Insulation. Insulated conductors used for connections between Resistance elements and controllers
    shall be suitable for an operating temperature of not less than ________°C
    90°C
  20. Part 4.70.2 Over 600
    Volts Nominal (c.) Combustible materials. Resistors and reactors shall not  be installed in closed enough proximity to
    combustible materials to constitute fire hazard and shall have a clearance of
    not less than _______ mm from combustible materials
    300mm
  21. Article  4.80 - 
    Storage Batteries. batteryis composed, of one or more rechargeable  cells of the _________,  _________, or other rechargeable  electrochemical types
    Lead Acid, Nicked Cadmium
  22. 4.80.1.2 Definitions
    Nominal Battery Voltage. The voltage are computed on the basis of  2
    volts per cell for the ________ types
    Lead Acid types
  23. 4.80.1.2 Definitions
    Nominal Battery Voltage. The voltage are computed on the basis of  1.2
    volts per cell for the ________ types
    ALKALI types
  24. A________cell or battery is one that has no provision for the addition of water or electrolyte
    or for external measurement of electrolyte specific gravity
    Sealed Cell
  25. Means to reduce the
    Residual Voltage. (Over 600V, Nominal)A means shall be provided to reduce the residual
    voltage of a capacitor to 50 volts or less, within ________
    minutes after the capacitor is disconnected from the source of supply
    5 minutes
  26. Means to reduce the
    Residual Voltage. (601Volts, Nominal)    A
    means shall be provided to reduce the residual voltage of a capacitor to 50
    volts or less, within ________ minutes after the capacitor is
    disconnected from the source of supply
    5 minutes
  27. Means to reduce the
    Residual Voltage. (1000V, Nominal)    A
    means shall be provided to reduce the residual voltage of a capacitor to 50
    volts or less, within ________ minutes after the capacitor is
    disconnected from the source of supply
    5 minutes
  28. Protective Devices
    Rated or Adjusted. (Over 600V, Nominal)  
    Protective devices for capacitor equipment shall be rated or adjusted to
    operate within the limits of the safe zone for the individual capacitors. If
    the protective devices are rated or adjusted to operate within the limits for zone
    1 or zone 2, the capacitor shall be ________ or
    ________. In no event shall the rating or adjustment of the protective devices
    exceed the maximum limit of zone 2
    Enclosed or Isolated
  29. Section 4.60.2.1
    Switching. (Over 600V, Nominal)   Group
    operated switches shall be used for capacitor
    switching and shall be capable of carrying continuously not less than
    ________percent of the rated current
    135 percent
  30. ________shall
    be provided with a means of discharging
    stored energy
    Capacitor
  31. Discharge of  Stored Energy. ( 600Volts, Nominal
    and Under)  (a) Time of Discharge.The residual voltage
    of a capacitor shall be reduce to 50 volts or less, within ________
    minutes after the capacitor is disconnected from the source of supply
    1 minute
  32. Discharge of  Stored Energy. ( 600Volts,
    Nominal)  (a) Time of Discharge.  The residual voltage of a capacitor shall be
    reduce to 50 volts or less, within ________ minutes after the capacitor
    is disconnected from the source of supply
    1 minute
  33. The
    ampacity of capacitor circuit
    conductor shall not be less than ________ percent of the rated current
    of capacitor
    135 percent
  34. Where a motor installation includes a capacitor connected on the load
    side of
    the motor overload device, the rating or setting of the motor overload device
    shall be base on the improved
    ________ of the motor circuit. The effect of the capacitor shall be
    disregarded in determining the motor circuit conductor rating
    Power Factor
  35. Capacitor cases shall be ________.
    Grounded in accordance w/ Article 2.50
  36. (Exception:)   Capacitor cases shall not be grounded where
    the capacitor units are supported on a ________ designed to operate at other
    than ground potential
    Structure Designed
  37. The
    rating of the capacitor’s disconnecting
    means shall not be less than ________ percent of the rated current of
    the capacitor
    135 percent
  38. Electrode
    type-boilers shall be supplied only from a ________ or from ________ , arranged to
    provide such a system
    3 phase, 4wire Solidly Grounded  Wye system, or from Isolating Transformers
  39. Capacitors containing
    more than
    ________ liters of flammable shall
    beenclosed in a vault
    or outdoor fenced enclosure complying with part 1.10.3. This limit shall
    apply to any single unit
    11 liters
  40. Capacitors
    that are not an integral part of the rotary-phase conversion systembut
    are installed for a motor loadshall be connected to the ________ of  that motor over load protective device
    Line Side
  41. Utilization
    equipment supplied by a rotary-phase converter shall be ________ in such a
    manner that power to the equipment will be disconnected in the event of the
    power interruption
    Controlled
  42. Part 4.55.2 Specific Provisions Applicable to Different types of Phase
    Converters. Section 4.55.2.2 (Start Up)           
    ________to the utilization equipment shall not be supplied until the
    rotary phase converter has been started
    Power
  43. Capacitors
    containing more than 11 liters of
    flammable shall be________in a vault or outdoor fenced enclosure
    complying with part 1.10.3. This limit shall apply to any single unit
    Enclosed
  44. Where
    single-phase loads are
    connected on the load side of phase converter, they shall not be
    connected to ________
    Manufactured Phase
  45. Where
    the loads to be supplied are variable,
    Over current Protection shall be set
    at not more than ________ percent of the phase converter nameplate single phase
    input full load amperes
    125 percent
  46. Section 4.55.1.2 Definitions. (Manufactured Phase).    The manufactured or derived phase originates
    at the phase converterand is
    not ________ connected to either of the single phase input conductors
    SOLIDLY CONNECTED
  47. Section 4.55.1.2 Definitions. (Manufactured Phase).    The manufactured or derived phase originates
    at the ________ and is not  solidlyconnected to either of
    the single phase input conductors
    PHASE CONVERTER
  48. Where
    the phase converter supplies specific
    fixed loads and the conductors are sized in accordance with their
    ampacity,the overcurrent protection shall not exceed ________ percent of the
    phase converter nameplate single phase input amperes
    125 percent
  49. An electrical device that converts single
    phase power   to   3-phase
    electrical power
    PHASE CONVERTER
  50. Phase
    converter that consist of a rotary transformer and capacitor panel(s) that
    permits the operation of a 3-phase
    loads from a single phase supply
    ROTARY-PHASE CONVERTER

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