1. In a semi-conductor diode, electrons flow from:
    A. anode to cathode.
    B. cathode to grid.
    C. grid to anode.
    D. cathode to anode.

  2. If alternating current is applied to the anode of a diode, what would you expect to see at the cathode?
    A. No signal.
    B. Steady direct current
    C. Pulsating direct current.
    D. Pulsating alternating current.

  3. In order for a diode to conduct, it must be:
    A. close coupled.
    B. forward-biased.
    C. enhanced.
    D. reverse-biased.

  4. The action of changing alternating current to direct current is called:
    A. amplification.
    B. rectification.
    C. transformation.
    D. modulation.

  5. The electrodes of a semi-conductor diode are known as:
    A. gate and source.
    B. anode and cathode.
    C. collector and base.
    D. cathode and drain.

  6. One important application for diodes is recovering information from transmitted signals. This is referred to as:
    A. regeneration.
    B. ionization.
    C. biasing.
    D. demodulation.

  7. What semi-conductor device glows red, yellow, or green, depending upon its chemical composition?
    A. A light-emitting diode.
    B. A fluorescent bulb.
    C. A neon bulb.
    D. A vacuum diode.

  8. The primary purpose of a Zener diode is to:
    A. provide a voltage phase shift.
    B. regulate or maintain a constant voltage.
    C. to boost the power supply voltage.
    D. provide a path through which current can flow.

  9. Voltage regulation is the principal application of the:
    A. junction diode.
    B. light-emitting diode.
    C. vacuum tube.
    D. Zener diode.

  10. Zener diodes are used as:
    A. current regulators.
    B. voltage regulators.
    C. RF detectors.
    D. AF detectors.

  11. The basic semi-conductor amplifying device is:
    A. tube.
    B. P-N junction.
    C. transistor.
    D. diode.

  12. The three leads from a PNP transistor are named:
    A. drain, base and source.
    B. collector, emitter and base.
    C. collector, source and drain.
    D. gate, source and drain.

  13. Which component can amplify a small signal using low voltages?
    A. A variable resistor.
    B. An electrolytic capacitor.
    C. A multiple-cell battery.
    D. A PNP transistor.

  14. Bipolar transistors usually have:
    A. 2 leads.
    B. 3 leads.
    C. 1 lead.
    D. 4 leads.

  15. A semi-conductor is described as a "general purpose audio NPN device". This would be:
    A. a bipolar transistor.
    B. a silicon diode.
    C. a triode.
    D. an audio detector.

  16. Two basic types of bipolar transistors are:
    A. diode and triode types.
    B. NPN and PNP types.
    C. varicap and zener types.
    D. P and N channel types.

  17. If a low level signal is placed at the input of a transistor, a higher level signal is produced at the output lead. This effect is known as:
    A. detection.
    B. modulation.
    C. rectification.
    D. amplification.

  18. A transistor can be destroyed in a circuit by:
    A. excessive heat.
    B. excessive light.
    C. saturation.
    D. cut-off.

  19. In a bipolar transistor, the ________ compares closest to the control grid of a triode vacuum tube:
    A. emitter.
    B. base.
    C. source.
    D. collector.

  20. In a bipolar transistor, the _________ compares closest to the plate in a triode vacuum tube:
    A. gate.
    B. emitter.
    C. collector.
    D. base.

  21. In a bipolar transistor, the _________ compares closest to the cathode of a triode vacuum tube:
    A. collector.
    B. base.
    C. drain.
    D. emitter.

  22. A semi-conductor having is leads labeled gate, drain and source is best described as a:
    A. gated transistor.
    B. field-effect transistor.
    C. bipolar transistor.
    D. silicon diode.

  23. The two basic types of field effect transistors (FET) are:
    A. NPN and PNP.
    B. germanium and silicon.
    C. inductive and capacitive.
    D. N and P channel.

  24. In a field effect transistor, the __________ is the terminal that controls the conductance of the channel.
    A. gate.
    B. drain.
    C. source.
    D. collector.

  25. In a field effect transistor, the ___________ is the terminal where the charge carriers enter the channel.
    A. source.
    B. gate.
    C. drain.
    D. emitter.

  26. In a field effect transistor, the __________ is the terminal where the charge carriers leave the channel.
    A. collector.
    B. source.
    C. drain.
    D. gate.

  27. Which semi-conductor device has characteristics most similar to a triode vacuum tube?
    A. Junction diode.
    B. Zener diode.
    C. Field effect transistor.
    D. Bipolar transistor.

  28. The control element of a field effect transistor is the:
    A. gate.
    B. source.
    C. drain.
    D. base.

  29. If you wish to reduce the current flowing in a field effect transistor, you could:
    A. increase the reverse bias voltage.
    B. decrease the reverse bias voltage.
    C. increase the forward bias voltage.
    D. increase the forward bias gain.

  30. The source of a field effect transistor corresponds to the _________ of a bipolar transistor.
    A. base.
    B. emitter.
    C. drain.
    D. collector.

  31. The drain of a field effect transistor corresponds to the _________ of a bipolar transistor.
    A. base.
    B. collector.
    C. source.
    D. emitter.

  32. Which two elements of a field effect transistor exhibit fairly similar characteristics?
    A. Source and gate.
    B. Gate and drain.
    C. Source and base.
    D. Source and drain.

  33. What is one reason a vacuum tube might be used instead of a transistor in a circuit?
    A. It uses less current.
    B. It may be able to handle higher power.
    C. It is much smaller.
    D. It uses lower voltages.

  34. Which component can amplify a small signal but must use high voltages?
    A. A vacuum tube.
    B. A transistor.
    C. An electrolytic capacitor.
    D. A multiple-cell battery.

  35. A feature common to tubes and transistors is that both: A. have electrons drifting through a vacuum. B. can amplify signals. C. convert electrical energy to radio waves. D. use heat to cause electron movement.

  36. In a vacuum tube, the element that is operated with the highest positive potential is the _________.
    A. filament (heater).
    B. plate.
    C. cathode.
    D. grid.

  37. In a vacuum tube, the electrode that is usually a cylinder of wire mesh is the ________.
    A. filament (heater).
    B. grid
    C. cathode.
    D. plate.

  38. In a vacuum tube, the electrode that is furthest away from the plate is the _________.
    A. grid.
    B. emitter.
    C. cathode.
    D. filament (heater).

  39. In a vacuum tube, the electrode that emits electrons is the ________.
    A. cathode.
    B. grid.
    C. collector.
    D. plate.

  40. What is inside the envelope of a triode vacuum tube?
    A. argon.
    B. A vacuum.
    C. Air.
    D. Neon.

  41. How many grids are there in a triode vacuum tube?
    A. two.
    B. three.
    C. three plus a filament.
    D. one.

  42. If you do not want to have current flowing in the grid circuit of a vacuum tube, the grid should be:
    A. positive with respect to the anode.
    B. negative with respect to the cathode.
    C. positive with respect to both cathode and anode.
    D. positive with respect to the cathode.

  43. The negative DC control voltage applied to the control grid of a vacuum tube is called:
    A. suppression voltage.
    B. bias voltage.
    C. repulsion voltage.
    D. excitation voltage.

  44. A circuit designed to increase the level of the input signal is called: A. an amplifier B. a modulator C. an oscillator
    D. a receiver

  45. If an amplifier became non-linear, the output signal would:
    A. become distorted
    B. be saturated
    C. cause oscillations
    D. overload the power supply

  46. Which of the following is NOT amplified by an amplifier?
    A. current
    B. resistance
    C. power
    D. voltage

  47. The increase in signal level by an amplifier is called:
    A. attenuation
    B. amplitude
    C. modulation
    D. gain

  48. A device with gain has the property of:
    A. attenuation
    B. oscillation
    C. modulation
    D. amplification

  49. A device labeled "Gain = 10dB" is likely to be an:
    A. attenuator
    B. oscillator
    C. audio fader
    D. amplifier

  50. Amplifiers can amplify:
    A. current, power, or inductance
    B. voltage, current, or power
    C. voltage, power, or inductance
    D. voltage, current, or inductance

  51. Which of the following is not a property of an amplifier?
    A. gain
    B. linearity
    C. distortion
    D. loss