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Amateur Radio Question PoolsNew! View the differences between the 2008 Extra question pool and the previous pool. Canadian Basic Qualification Question PoolPrev 1 2 3 4 5 6 7 8 NextB-004-01-01 A circuit designed to increase the level of its input signal is called: an amplifier a modulator an oscillator a receiver B-004-01-02 If an amplifier becomes non- linear, the output signal would: become distorted be saturated cause oscillations overload the power supply B-004-01-03 To increase the level of very weak radio signals from an antenna, you would use: an RF oscillator an audio oscillator an RF amplifier an audio amplifier B-004-01-04 To increase the level of very weak signals from a microphone you would use: an RF oscillator an RF amplifier an audio amplifier an audio oscillator B-004-01-05 The range of frequencies to be amplified by a speech amplifier is typically: 3 to 300 Hz 300 to 1000 Hz 40 to 40 000 Hz 300 to 3400 Hz B-004-01-06 Which of the following IS NOT amplified by an amplifier? current resistance power voltage B-004-01-07 The increase in signal level by an amplifier is called: attenuation amplitude modulation gain B-004-01-08 A device with gain has the property of: attenuation oscillation modulation amplification B-004-01-09 A device labelled "Gain = 10 dB" is likely to be an: attenuator oscillator audio fader amplifier B-004-01-10 Amplifiers can amplify: current, power, or inductance voltage, current, or power voltage, power, or inductance voltage, current, or inductance B-004-01-11 Which of the following is not a property of an amplifier? gain linearity distortion loss B-004-02-01 Zener diodes are used as: current regulators voltage regulators RF detectors AF detectors B-004-02-02 One important application for diodes is recovering information from transmitted signals. This is referred to as: regeneration ionization biasing demodulation B-004-02-03 The primary purpose of a Zener diode is to: provide a voltage phase shift regulate or maintain a constant voltage to boost the power supply voltage provide a path through which current can flow B-004-02-04 The action of changing alternating current to direct current is called: amplification rectification transformation modulation B-004-02-05 The electrodes of a semi- conductor diode are known as: gate and source anode and cathode collector and base cathode and drain B-004-02-06 If alternating current is applied to the anode of a diode, what would you expect to see at the cathode? No signal Steady direct current Pulsating direct current Pulsating alternating current B-004-02-07 In a semi-conductor diode, electrons flow from: anode to cathode cathode to grid grid to anode cathode to anode B-004-02-08 What semi-conductor device glows red, yellow, or green, depending upon its chemical composition? A light-emitting diode A fluorescent bulb A neon bulb A vacuum diode B-004-02-09 Voltage regulation is the principal application of the: junction diode light-emitting diode vacuum diode Zener diode B-004-02-10 In order for a diode to conduct, it must be: close coupled forward-biased enhanced reverse-biased B-004-03-01 Which component can amplify a small signal using low voltages? A variable resistor An electrolytic capacitor A multiple-cell battery A PNP transistor B-004-03-02 The basic semi-conductor amplifying device is the: tube P-N junction transistor diode B-004-03-03 The three leads from a PNP transistor are named: drain, base and source collector, emitter and base collector, source and drain gate, source and drain B-004-03-04 If a low level signal is placed at the input to a transistor, a higher level of signal is produced at the output lead. This effect is know as: detection modulation rectification amplification B-004-03-05 Bipolar transistors usually have: 2 leads 3 leads 1 lead 4 leads B-004-03-06 A semi-conductor is described as a "general purpose audio NPN device". This would be: a bipolar transistor a silicon diode a triode an audio detector B-004-03-07 The two basic types of bipolar transistors are: diode and triode types NPN and PNP types varicap and zener types P and N channel types B-004-03-08 A transistor can be destroyed in a circuit by: excessive heat excessive light saturation cut-off B-004-03-09 In a bipolar transistor, the _____________compares closest to the control grid of a triode vacuum tube. emitter base source collector B-004-03-10 In a bipolar transistor, the _____________compares closest to the plate of a triode vacuum tube. gate emitter collector base B-004-03-11 In a bipolar transistor, the _____________ compares closest to the cathode of a triode vacuum tube. collector base drain emitter B-004-04-01 The two basic types of field effect transistors (FET) are: NPN and PNP germanium and silicon inductive and capacitive N and P channel B-004-04-02 A semi-conductor having its leads labeled gate, drain, and source is best described as a: gated transistor field-effect transistor bipolar transistor silicon diode B-004-04-03 In a field effect transistor, the ___________ is the terminal that controls the conductance of the channel. gate drain source collector B-004-04-04 In a field effect transistor, the ___________is the terminal where the charge carriers enter the channel. source gate drain emitter B-004-04-05 In a field effect transistor, the __________ is the terminal where the charge carriers leave the channel. collector source drain gate B-004-04-06 Which semi-conductor device has characteristics most similar to a triode vacuum tube? Junction diode Zener diode Field effect transistor Bipolar transistor B-004-04-07 The control element in the field effect transistor is the: gate source drain base B-004-04-08 If you wish to reduce the current flowing in a field effect transistor, you could: increase the reverse bias voltage decrease the reverse bias voltage increase the forward bias voltage increase the forward bias gain B-004-04-09 The source of a field effect transistor corresponds to the _______ of a bipolar transistor. base emitter drain collector B-004-04-10 The drain of a field effect transistor corresponds to the _______ of a bipolar transistor. base collector source emitter B-004-04-11 Which two elements in a field effect transistor exhibit fairly similar characteristics? Source and gate Gate and drain Source and base Source and drain B-004-05-01 What is one reason a triode vacuum tube might be used instead of a transistor in a circuit? It uses less current It may be able to handle higher power It is much smaller It uses lower voltages B-004-05-02 Which component can amplify a small signal but must use high voltages? A vacuum tube A transistor An electrolytic capacitor A multiple-cell battery B-004-05-03 A feature common to tubes and transistors is that both: have electrons drifting through a vacuum can amplify signals convert electrical energy to radio waves use heat to cause electron movement B-004-05-04 In a vacuum tube, the electrode that is operated with the highest positive potential is the _________. filament (heater) plate cathode grid B-004-05-05 In a vacuum tube, the electrode that is usually a cylinder of wire mesh is the _______. filament (heater) grid cathode plate B-004-05-06 In a vacuum tube, the element that is furthest away from the plate is the __________. grid emitter cathode filament (heater) B-004-05-07 In a vacuum tube, the electrode that emits electrons is the __________. cathode grid collector plate B-004-05-08 What is inside the envelope of a triode tube? argon a vacuum air neon B-004-05-09 How many grids are there in a triode vacuum tube? two three three plus a filament one B-004-05-10 If you do not wish to have current flowing in the grid circuit of a vacuum tube, the grid should be: positive with respect to the anode negative with respect to the cathode positive with respect to both cathode and anode positive with respect to the cathode B-004-05-11 The negative DC control voltage applied to the control grid of a vacuum tube is called: suppression voltage bias voltage repulsion voltage excitation voltage B-004-06-01 How do you find a resistor's tolerance rating? By using Thevenin's theorem for resistors By reading the resistor's color code By reading its Baudot code By using a voltmeter B-004-06-02 What do the first three-color bands on a resistor indicate? The resistance material The power rating in watts The value of the resistor in ohms The resistance tolerance in percent B-004-06-03 What does the fourth color band on a resistor mean? The value of the resistor in ohms The power rating in watts The resistance material The resistance tolerance in percent B-004-06-04 What are the possible values of a 100 ohm resistor with a 10% tolerance? 90 to 110 ohms 90 to 100 ohms 10 to 100 ohms 80 to 120 ohms B-004-06-05 How do you find a resistor's value? By using the resistor's color code By using a voltmeter By using Thevenin's theorem for resistors By using the Baudot code B-004-06-06 Which tolerance rating would a high-quality resistor have? 5% 10% 20% 0.1% B-004-06-07 Which tolerance rating would a low-quality resistor have? 20% 0.1% 5% 10% B-004-06-08 If a carbon resistor's temperature is increased, what will happen to the resistance? It will stay the same It will change depending on the resistor's temperature coefficient rating It will become time dependent It will increase by 20% for every 10 degrees centigrade B-004-06-09 A gold band on a resistor indicates the tolerance is: 20% 10% 5% 1% B-004-06-10 A resistor with a colour code of brown, black, and red, would have a value of: 1000 ohms 100 ohms 10 ohms 10 000 ohms B-004-06-11 A resistor is marked with the colors red, violet and yellow. This resistor has a value of: 274 72 k 27 M 270 k |
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