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Practice Exam 5.
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1. ECT PBE: In measurements using CRO, Lissajous patterns are used to.
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2. ECT PBE: A series of gradually-decreasing sine wave oscillations is called:.
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3. ECT PBE: What is the next step after discovering a faulty gate within an IC..
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4. ECT PBE: Which of the Following is a good solder?.
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5. Which device would best aid in shorted track detection?.
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6. ECT PBE: What resonant frequency of a series RLC circuit. If R is 47 ohms I. is 3 microhenry's and C is 15 microfarads.
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7. Why do resistors sometimes get hot when in use?.
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8. Voltage drops means:. A voltage developed across the terminals of a component. Any point in a radio circuit which has zero voltage Difference in voltage at output terminals of a transformer The voltage which is dissipated before useful works is accomplished A voltage developed across the terminals of a component..
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9. ECT PBE: Two resistor are connected in parallel and are connected across a 40-volt battery. If each resistor is 1000 ohms. The total current is:.
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10. How is the voltmeter usually connected to a circuit under test..
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11. ECT PBE: Refer to a figure A: What is the total resistance.
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12. ECT PBE: Refer to Figure A: what is the Current across 50 0hms.
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13. ECT PBE: Refer to figure A: what is the voltage across one 10 ohms.
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14. Coulomb is equivalent to. Joule/ Volt Joule-volt volt/joule All of the above Joule/ Volt.
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15. If two equal value capacitance are connected in series . What is their total capacitance.
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16. Which of the following amplifier has a voltage gain less than 1?.
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17. Thyristor has ____pn junction. 1 2 3 4 3.
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18. Thyristor has ___ semiconductor layers. 1 2 3 4 4.
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19. Refer to figure A: what device I in (d). SCR SBS DIAC TRIAC SCR.
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20. Refer to figure A: what device is in (e)?. SCR UJT TRIAC SBS TRIAC.
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21.What is the output of the flipflop if j= 1 K= 1?.
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22. Approximately what frequency range can most humans hear?.
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23.ECT PBE: what is the name for the distance an ac signal travels during one Complete cycle?.
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24. How can you decrease your transmitters power by 3 dB?.
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25. The unit of “Decibel” is use to indicate:. An oscilloscope wave form A mathematical ratio Certain radio waves A single side band signal A mathematical ratio.
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26. What electromagnetic wave polarization does a Yagi antenna have when its element s are parallel to the earth’s surface..
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27. The wavelength corresponding to a frequency of 2 MHz is:.
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28. ECT PBE: Which is not search engine. Bing Google Yahoo Opera opera.
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29. What is the complement of blue?. Cyan Yellow Magenta Amber Yellow.
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30. ___ angle is defined as the horizontal pointing angle of an earth station antenna.
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31. In Rj 45 – Rj means. Radio jack Resistance jack Radio jacket Registered Jacket Registered Jacket.
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32. What antenna polarization is normally used for long –distance weak signal CW and SSB contacts using the VHF and UHF bands.
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33.Which mode of voice communication is most commonly used on the high frequency amateur bands?.
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34.Which emission type has the narrowest bandwidths?.
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35. What is the term use to describe an amateur station that is transmitting and receiving on the same frequency.
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36. Why would you use a key- operated on/off switch in the main power line of your station?.
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37. b2-4ac>0, it has. Two real roots and unequal Two real roots and equal No real roots One real roots Two real roots and unequal.
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38. Ten more than 4 times certain number is thirty. What is the value of the number.
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39. Graph of function f(x)=ax is asymptotic to. Positive y- axis Negative x- axis Negative y- axis Positive x- axis Negative x- axis.
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40. Given an arithmetic series: 2, 5, 8… what is the 20th term ?.
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41.How many diagonals are there in an octagon?. 20 22 24 25 20.
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42. What is the total surface area of an open –top cylindrical tank with height of the 10 cm and radius of the base of 3 cm.
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43. If the distance between the points (-5,-3) and (2, y) is 9.9 units find y.
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44. What does FDAS stand for. Fire distribution and alarm system Fire detection and alarm standard Fire detection and activation standard Fire detection and alarm system Fire detection and alarm system.
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45. Section 4 in RA 9292. Definition of terms Composition of the board Categories of practice Power of the board Categories of practice.
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46. RA 10912 contains____ articles with ___ sections.