1. | 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 : |
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2. | Which instrument or test set is LEAST likely to be used during the testing of medium voltage cables |
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3. | If an AC voltage has a frequency of 350 hertz, how many times will the positive peak value of voltage occur after 2 seconds? |
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4. | The maximum voltage rating of a multi-meter used without a high voltage probe is typically |
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5. | If 4000 was the specified value, and 3850 was the mesured value, what is the percent error? |
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6. | The sum of the interior angles of a triangle is : |
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7. | What side of the power triangle is the longest? |
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8. | Insulation power factor test equipment |
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9. | A two winding transformer that has a lower primary voltage than its secondary is known as: |
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10. | If the current lags the voltage by 90 degrees, it is purely a _____________ circuit. |
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11. | A 35 microfarad capacitor is connected to a 120 volt, 60 hz line. What is the value of Xc? |
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12. | Insulation resistance tests sets usually include ___ test connection terminals. |
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13. | To make a resistance measurement, start with the ohmmeter set on : |
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14. | There are _____ degrees in one cycle of a sine wave. |
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15. | Reactive power is measured in: |
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16. | Generally, high current test sets: |
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17. | On a 575 Delta system, what is the line to line voltage? |
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18. | What is the total circuit resistance? |
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19. | Watt is a unit of: |
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20. | Voltage in an electrical system: |
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21. | The RMS value of a sinusoidal wave is equal to the peak value times: |
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22. | Measuring instruments with graduated scales and pointers are referred to as __________ type instruments |
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23. | To measure circuit resistance, first |
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24. | What current will flow in this circuit? |
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25. | What test equipment is used to test the RTD inputs of a motor protective relay? |
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26. | Typical ground resistance test sets provide : |
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27. | What is the total power consumed in the circuit? |
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28. | A polorization index test typically requires the use of : |
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29. | Low resistance ohmmeters typically include ____ test connection terminals |
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30. | An ampere is |
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31. | Winding resistance measurements are performed by using a : |
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32. | Multi-meters can be routinely used to |
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33. | One giga unit is equal to: |
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34. | Capacitance is measured in: |
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35. | How would you use a VOM rated at 10 amperes maximum to measure a 100 amp load? |
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36. | If X=5 , Y=6, then : XY(X^2 -Y) = X times Y times (X squared minus Y) |
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37. | In a series ac circuit that contains only capacative reactance and resistance, the current : |
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38. | The henry is a unit of measurement of |
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39. | What is the kVA rating of a 3 phase generator rated at 100kW with a .9 power factor? |
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40. | With insulation resistance test equipment : |
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41. | Properly adjusting to the null point of a transformer turns ratio test set : |
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42. | If a specified value is 120.00 , and the measured value is 124.56, the % error is: |
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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 |
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44. | Kilo equals : |
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45. | The batteries in a typical analog multimeter are required for: |
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46. | Power factor is calculated by: |
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47. | 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) |
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48. | What is the turns ratio of a 3 phase 500kVA, 13,200-480 volt rated D-D transformer that is 80% loaded? |
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49. | What is indicated when the turns ratio test set is hard to crank and the correct exciting voltage cannot be reached ? |
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50. | Which formula is correct if : A=100, B= 200, and C= 300 |
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