Prime Power Test Technician Level 2 Practice Exam 2 Of 3 (technical)

50 Questions  I  By Michaelleal01
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 Prime Power Test Technician Level 2 Practice Exam 2 Of 3 (technical)
Test Technician Level 2 practice exam. 50 questions selected at random. 90 minute time limit. Please allow yourself at least 1 hour to complete the test properly. 70% is passing. You cannot save test and resume later. Good Luck!

  
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  • 1. 
    The sum of the interior angles of a triangle is :
    • A. 

      360

    • B. 

      120

    • C. 

      180

    • D. 

      90


  • 2. 
    If  X=5 , Y=6, then : XY(X^2 -Y) =                      X times Y times   (X squared minus Y)
    • A. 

      370

    • B. 

      570

    • C. 

      840

    • D. 

      930


  • 3. 
    If a specified value is 120.00 , and the measured value is 124.56, the % error is:
    • A. 

      6.39%

    • B. 

      4.56%

    • C. 

      45.6%

    • D. 

      3.8%


  • 4. 
    One giga unit is equal to:
    • A. 

      1,000

    • B. 

      .001

    • C. 

      100,000

    • D. 

      1,000,000

    • E. 

      1,000,000,000


  • 5. 
    Which formula is correct if : A=100, B= 200, and C= 300
    • A. 

      C=A-B

    • B. 

      C=C+A

    • C. 

      A=B+C

    • D. 

      B=C-A


  • 6. 
    Kilo equals :
    • A. 

      Mega / 1000

    • B. 

      Giga / 100

    • C. 

      Deca x 10

    • D. 

      Mili x 1000


  • 7. 
    If 4000 was the specified value, and 3850 was the mesured value, what is the percent error?
    • A. 

      -.096

    • B. 

      -3.75

    • C. 

      3.90

    • D. 

      1.04


  • 8. 
    Insulation resistance tests sets usually include ___ test connection terminals.
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4


  • 9. 
    With insulation resistance test equipment :
    • A. 

      Leakage current returned by the guard lead are not normally metered

    • B. 

      Leakage current returned by the guard lead passes through the meter

    • C. 

      The guard lead provides stabilizing voltage

    • D. 

      The guard lead must be connected to ground


  • 10. 
    Properly adjusting to the null point of a transformer turns ratio test set :
    • A. 

      Measures the difference between the test set's internal fixed ratio reference transformer and the specimen transformer

    • B. 

      Assures correct test current flow and test voltage

    • C. 

      Is accomplished by changing the adjustable ratio of the test set's reference transformer

    • D. 

      Is accomplished by changing the test set's adjustment dial unil the test set impedence matches the specimen transformer's impedance

    • E. 

      None of the above


  • 11. 
    Typical ground resistance test sets provide :
    • A. 

      3 output current terminals

    • B. 

      3 output voltage terminals

    • C. 

      4 output voltage terminals

    • D. 

      4 output terminals

    • E. 

      None of the above


  • 12. 
    An insulation resistance test set has 3 scales on its meter face. The top scale is 3 to 3k gigohms. The center scale is 30 to 30k megohms. The bottom scale is 3 to 30k kilohms. After selecting the center scale and connecting the leads to a 2300 volt , 500 HP motor, the instrument indicates the lowest reading. You have determined that :
    • A. 

      There are shorted turns in the windings

    • B. 

      The motor insulation is weak

    • C. 

      The value measured should be reported

    • D. 

      The test set is on the wrong scale

    • E. 

      B and D are correct


  • 13. 
    What is indicated when the turns ratio test set is hard to crank and the correct exciting voltage cannot be reached ?
    • A. 

      Incorrect polarity

    • B. 

      Shorted specimen windings

    • C. 

      Open windings

    • D. 

      KVa rating is too large

    • E. 

      A or B


  • 14. 
    Low resistance ohmmeters typically include ____ test connection terminals
    • A. 

      2

    • B. 

      3

    • C. 

      4

    • D. 

      5

    • E. 

      6


  • 15. 
    Winding resistance measurements are performed by using a :
    • A. 

      Megohmeter

    • B. 

      Multimeter

    • C. 

      Low resistance ohmmeter

    • D. 

      Insulation resistance test set


  • 16. 
    Measuring instruments with graduated scales and pointers are referred to as __________ type instruments
    • A. 

      Analog

    • B. 

      Digital

    • C. 

      LED

    • D. 

      Averaging

    • E. 

      Recording


  • 17. 
    Generally, high current test sets:
    • A. 

      Provide controllable high currents at 277/480 volts

    • B. 

      Are 3 phase devices

    • C. 

      Are operated ungrounded

    • D. 

      Provide high test voltages

    • E. 

      Provide high test currents at 10 volts or less


  • 18. 
    Which instrument or test set is LEAST likely to be used during the testing of medium voltage cables
    • A. 

      Megohmmeter

    • B. 

      Ohmmeter

    • C. 

      DC high potential test set

    • D. 

      Voltage detector

    • E. 

      Turns ratio test set


  • 19. 
    A polorization index  test typically requires the use of :
    • A. 

      Voltmeter

    • B. 

      Megohhmeter

    • C. 

      Low resistance ohmmeter

    • D. 

      Power factor test set

    • E. 

      Watt or phase angle meter


  • 20. 
    Insulation power factor test equipment
    • A. 

      Is 3 phase

    • B. 

      Can perform load power factor measurement

    • C. 

      Is frequently used to test transformers

    • D. 

      Measures transformer or feeder power usage

    • E. 

      Verifies power ratings


  • 21. 
    What test equipment is used to test the RTD inputs of a motor protective relay?
    • A. 

      Decade box

    • B. 

      High current test set

    • C. 

      Relay test set

    • D. 

      Multi-meter

    • E. 

      Megohmmeter


  • 22. 
    Multi-meters can be routinely used to
    • A. 

      Measure resistance between switchgear and building neutrals and ground conductors during maintenance testing of ground faults

    • B. 

      To prove the integrity of bolted bus and cable connections

    • C. 

      To measure phase angle

    • D. 

      All of the above

    • E. 

      None of the above


  • 23. 
    How would you use a VOM rated at 10 amperes maximum to measure a 100 amp load?
    • A. 

      Use the 10A scale

    • B. 

      Use the ohm scale

    • C. 

      Use the volt scale

    • D. 

      Use the mA scale

    • E. 

      Use a current transformer


  • 24. 
    To measure circuit resistance, first
    • A. 

      Zero the ohm scale

    • B. 

      Check for the presence of voltage

    • C. 

      Start with the highest ohm scale

    • D. 

      Check frequency


  • 25. 
    The maximum voltage rating of a multi-meter used without a high voltage probe is typically
    • A. 

      2500 volts RMS, continuous

    • B. 

      2500 volts RMS or dc, continuous

    • C. 

      750-1000 volts RMS, non-continuous

    • D. 

      600 volts peak

    • E. 

      500 volts ac or dc, continuous


  • 26. 
    To make a resistance measurement, start with the ohmmeter set on :
    • A. 

      The lowest resistance scale

    • B. 

      The mid range scale

    • C. 

      The highest resistance scale

    • D. 

      Any scale


  • 27. 
    The batteries in a typical analog multimeter are required for:
    • A. 

      Dc voltage measurements

    • B. 

      Ac voltage measurements

    • C. 

      Ampere measurements

    • D. 

      Resistance measurements

    • E. 

      All meter measurements


  • 28. 
    Voltage in an electrical system:
    • A. 

      Is a measurement of power flow

    • B. 

      Is always measured to ground

    • C. 

      Is equivelent to the pressure of a water system

    • D. 

      Varies with ampere flow

    • E. 

      Is a result of resistance


  • 29. 
    On a 575 Delta system, what is the line to line voltage?
    • A. 

      332

    • B. 

      600

    • C. 

      480

    • D. 

      994

    • E. 

      575


  • 30. 
    Watt is a unit of:
    • A. 

      True power

    • B. 

      Apparent power

    • C. 

      Reactive power

    • D. 

      Real power

    • E. 

      A and D


  • 31. 
    Capacitance is measured in:
    • A. 

      Watts

    • B. 

      Coulombs

    • C. 

      Farads

    • D. 

      Henrys

    • E. 

      Voltamps


  • 32. 
    There are _____ degrees in one cycle of a sine wave.
    • A. 

      180

    • B. 

      360

    • C. 

      720

    • D. 

      90

    • E. 

      60


  • 33. 
    Reactive power is measured in:
    • A. 

      Watts

    • B. 

      Vars

    • C. 

      Voltamps

    • D. 

      Ohms

    • E. 

      Joules


  • 34. 
    An ampere is
    • A. 

      Electromotive force

    • B. 

      Torque

    • C. 

      Resistance to flow

    • D. 

      One coulomb per second

    • E. 

      Electrostatic charge


  • 35. 
    The henry is a unit of measurement of
    • A. 

      Reactance

    • B. 

      Resistance

    • C. 

      Energy

    • D. 

      Capacitance

    • E. 

      Inductance


  • 36. 
    Power factor is calculated by:
    • A. 

      V/A

    • B. 

      KW/kVA

    • C. 

      HP/V

    • D. 

      I/R

    • E. 

      VA


  • 37. 
    If an AC voltage has a frequency of 350 hertz, how many times will the positive peak value of voltage occur after 2 seconds?
    • A. 

      350

    • B. 

      700

    • C. 

      1400

    • D. 

      2800

    • E. 

      175


  • 38. 
    What side of the power triangle is the longest?
    • A. 

      Watts

    • B. 

      Apparent

    • C. 

      Vars

    • D. 

      Reactive

    • E. 

      True


  • 39. 
    A two winding transformer that has a lower primary voltage than its secondary is known as:
    • A. 

      A low voltage transformer

    • B. 

      A high voltage transformer

    • C. 

      A step up transformer

    • D. 

      A step down transformer

    • E. 

      An autotransformer


  • 40. 
    The RMS value of a sinusoidal wave is equal to the peak value times:
    • A. 

      2.0

    • B. 

      1.732

    • C. 

      .80

    • D. 

      .707

    • E. 

      1.414


  • 41. 
    If the current lags the voltage by 90 degrees, it is purely a _____________ circuit.
    • A. 

      Resistive

    • B. 

      Inductive

    • C. 

      Capacitive

    • D. 

      Parallel

    • E. 

      Series


  • 42. 
    A 119 volt, 60hz AC voltage is put across a series circuit with an 8 ohm resistor and a capacitor who's reactance is 15 ohms. What is the circuit impedance? Z = Square root of (R^2 + Xc^2)
    • A. 

      23 ohms

    • B. 

      17 ohms

    • C. 

      15 ohms

    • D. 

      12.5 ohms

    • E. 

      7 ohms


  • 43. 
    A 0.8 henry inductor is connected to a 120 volt, 60hz line. How much current will flow?  hint:  Z= (2xpi)(Frequency)(Henrys)  and I= E/Z
    • A. 

      .398 amps

    • B. 

      .800 amps

    • C. 

      1.25 amps

    • D. 

      150 amps


  • 44. 

    A 35 microfarad capacitor is connected to a 120 volt, 60 hz line. What is the value of Xc?
    • A. 

      3.428

    • B. 

      21.54

    • C. 

      75.79

    • D. 

      205.68

    • E. 

      1292.4


  • 45. 
    In a series ac circuit that  contains only capacative reactance and resistance, the current :
    • A. 

      Leads the voltage by 90 degrees

    • B. 

      Lags the voltage by 90 degrees

    • C. 

      Is in phase with the voltage

    • D. 

      Leads the voltage by less than 90 degrees

    • E. 

      Lags the voltage by less than 90 degrees


  • 46. 
    What is the kVA rating of a 3 phase generator rated at 100kW with a .9 power factor?
    • A. 

      111 kVA

    • B. 

      90 kVA

    • C. 

      100 kVA

    • D. 

      190 kVA


  • 47. 

    What is the total circuit resistance?
    • A. 

      100 ohms

    • B. 

      50 ohms

    • C. 

      10 ohms

    • D. 

      1 ohm


  • 48. 

    What is the total power consumed in the circuit?
    • A. 

      4320 watts

    • B. 

      1260 watts

    • C. 

      4200 watts

    • D. 

      120 watts

    • E. 

      720 watts


  • 49. 

    What current will flow in this circuit?
    • A. 

      6 amps

    • B. 

      3 amps

    • C. 

      14 amps

    • D. 

      8 amps

    • E. 

      12 amps


  • 50. 
    What is the turns ratio of a 3 phase 500kVA, 13,200-480 volt rated D-D transformer that is 80% loaded?
    • A. 

      38.122

    • B. 

      27.5

    • C. 

      22.0

    • D. 

      47.653

    • E. 

      None of the above


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