6A92 - Shock excitation into an L-C circuit is the result of:
D.All of the above
A.A voltage being momentarily introduced
B.The capacitor may be charged
C.The inductor may have a voltage induced
6A93 - The term cathode ray usually applies to:
A.A fairly high velocity electron beam
B.Background noise
C.The logarithm gain of an electron beam
D.None of the above
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6A94 - Shielding an RF inductance:
D.All of the above
A.Increases the losses of the inductance
B.Lowers the inductance value and the Q
C.Increases the coil capacity to the shield
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6A95 - The tendency of a tank circuit to keep oscillating for a time after the excitation energy has been removed is:
B.Flywheel effect
A.Push-pull effect
C.Polarizing effect
D.Parasitic oscillation
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6A96 - Power factor is defined as:
C.Both A&B
A.The ratio between the resistance and the impedance in a circuit
B.The ratio between the true power and the apparent power of a circuit
D.None of the above
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6A97 - High or low frequency oscillations occurring in circuits other than the original tank desired output frequencies are:
B.Parasitic oscillations
A.Harmonics
C.Hysteresis
D.Eddy currents
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6A98 - What are effects of parasitic oscillations?
D.All of the above
A.Change of bias
B.Reduced efficiency of the amplifier tube
C.Distortion of the modulated wave
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6A99 - The velocity of propagation of radio frequency waves in free space is:
D.All of the above
A.300,000 meters / second
B.186,284 miles / second
C.The same as the velocity of light in free space
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6A100 - To double the resonant frequency of a resonant circuit:
B.Make L and C both half their original values
A.Make C one third of its original value
C.Decreasing the value of both L and C in any proportion so that their product will be one-half of the original values
D.None of the above
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6A45 - Conductors differ from nonconductors, i.e.:
D.A & B
A.There are a large number of free electrons in a good conductor
B.There is a small number of free electrons in a non-conductor
C.There is an equal amount of free electrons in a good conductor and in a non-conductor
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6A46 - Direction of flow of DC electricity in a conductor can be determined by:
D.A & C
A.A magnetic compass and the left hand rule
B.A magnetic compass and the right hand rule
C.Connecting an ammeter with marked polarities in series with the circuit
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6A47 - The difference between electrical power and electrical energy is:
C.A & B
A.Electrical power is the rate of doing work by electricity
B.Electrical energy is the ability to accomplish work by electricity
D.None of the above
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6A48 - A positive temperature coefficient means:
C.Both A & B
A.Resistance increases as the temperature increases
B.Resistance decreases as the temperature decreases
D.None of the above
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6A49 - A liquid which is capable of conducting electricity, but undergoes decomposition while doing so is:
A.An electrolyte
B.A ferromagnetic material under the influence of a magnetizing force
C.Equal to the ohmic resistance of the circuit
D.None of the above
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6A50 - The effective value of an RF current and the heating value of the current are:
A.The same
B.Effective value divided by two equals the heating value
C.Effective value multiplied by two equals the heating value
D.None of the above
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6A51 - One horsepower is:
D.All of the above
A.746 Watts
B.Roughly 3/4 kilowatt
C.Corresponds to lifting 550 pounds at the rate of one foot per second
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6A52 - What factors determine the heat generated in a conductor?
C.Both A & B
A.It is directly proportional to the resistance
B.It is directly proportional to the square of the current
D.None of the above
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6A53 - What is the ratio of peak to average value of a sine wave?
D.A & B
A.1.57 to 1
B.1 to 0.636
C.1 to 1
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6A54 - When the current sine wave in a circuit reaches its peak value before the voltage wave:
A.It is said to have a leading power factor
B.It is said to have a lagging power factor
C.It is said to be in phase
D.None of the above
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6A55 - An "harmonic" is:
A.A whole multiple of an original frequency
B.The heating value of an RF current
C.The internal impedance of a power source
D.A multiple of the power factor
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