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NCATT Study > Chapter Test 3 and 4 > Flashcards

Chapter Test 3 and 4 Flashcards

1
Q

How many flip flops are required to divide a signal frequency by 4?

A

2.

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2
Q

Which transistor region is very thin and lightly doped?

A

The base region.

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3
Q

Passes high frequencies and attenuates low frequencies.

A

High pass filter.

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4
Q

The output frequency is determined by the resonant frequency of the piezoelectric crystal in the oscillator:

A

Crystal-controlled oscillator.

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5
Q

Numbers on the horizontal axis are called?

A

Real numbers.

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6
Q

A pure semiconductor is often referred to as?

A

Intrinsic semiconductor.

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7
Q

What are the three types of materials used in electronics?

A

Conductors, Semi-Conductors, Insulators.

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8
Q

Synchronous bistable storage devices capable of storing one bit.

A

Flip flops.

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9
Q

“B” in hexadecimal is what number in decimal?

A

11.

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10
Q

This type of lead-acid battery is more powerful and require less maintenance than the old style. There is also no need to add water for this type. What type is being considered?

A

Sealed cell.

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11
Q

(1110) is binary for which number?

A

14.

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12
Q

Describes the behavior of a logic gate:

A

Truth table.

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13
Q

What is the approximate operating current of a light emitting diode?

A

20 mA.

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14
Q

Digital circuit with three inputs for carry in and two bits with sum and carry outputs.

A

Full-adder.

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15
Q

An adaptable amplifier with inverting and non-inverting inputs featuring high input and low output impedance, and very high gain.

A

Operational amplifier.

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16
Q

The region of a bipolar transistor that receives the flow of current carriers.

A

Collector.

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17
Q

Any HIGH in will output a LOW, all LOW’s in will cause a HIGH.

A

NOR Gate.

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18
Q

A semiconductor condition of operation in which a high-resistance state exists.

A

Reverse bias.

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19
Q

Combinational logic block selects one of X inputs and directs the information to a single output.

A

Multiplexer.

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20
Q

This is between two conductors an could cause output signal amplitude to decrease. It is normally not a problem in audio amplifiers. Usually exists between circuit components and wiring.

A

Stray capacitance.

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21
Q

Which of the following is not one of the components that cause low frequency gain loss in a cascade amplifier?

A

Oscillators.

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22
Q

Cells are connected in series to:

A

Increase the voltage output.

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23
Q

Basic sequential logic device having two stable states. Can serve as a memory device.

A

Flip-flop.

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24
Q

A logic device that translates from decimal to another code such as binary.

A

Decoder.

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25
Q

What type of wave is made up of sine waves of the fundamental frequency and all the odd harmonics?

A

Square wave.

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26
Q

What causes a squelch circuit to function?

A

Presence of noise.

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27
Q

For a silicon diode, the barrier potential is approximately.

A

7V.

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28
Q

Which of the following cells is not a primary cell?

A

Lead-acid.

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29
Q

During band-reject filter operation the series components do what?

A

Pass all frequencies above and below the cut off frequencies.

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30
Q

This type of oscillator uses two components, an inductor and capacitor, which when charged operates at resonance which produces the carrier frequency that is used for the radio transmitter.

A

LC Oscillator.

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31
Q

Thyristors are used extensively in.

A

High-power switching applications.

32
Q

A solid state amplifying or controlling device which commonly has three leads.

A

Transistor.

33
Q

When the collector current in a transistor is zero, the transistor is?

A

Cut off.

34
Q

To lengthen an antenna electrically, add a:

A

Coil.

35
Q

Which of the following is not a configuration for filters?

A

I.

36
Q

What is the range of voltage ratings available in Zener diodes.

A

2.4 volts to 200 volts and above.

37
Q

(0111) is binary for which number?

A

7.

38
Q

What is the biggest disadvantage of the common-base amplifier?

A

Its low input impedance.

39
Q

Special solid state device used to increase the drive current at the output.

A

Buffer.

40
Q

Electronic components such as diodes and transistors that can rectify or amplify.

A

Active components.

41
Q

This type of battery has the electrodes welded together and has been developed with a high degree of efficiency and dependability.

A

Nickel-cadmium cell.

42
Q

Any HIGH in will output a LOW, All LOW’s will cause a HIGH.

A

NOR Gate.

43
Q

All HIGHs in will output a LOW, any LOW in will cause a HIGH output.

A

NAND Gate.

44
Q

The moveable arm of an attraction-type relay is called:

A

Armature.

45
Q

In a p-type semiconductor the majority current carriers are?

A

Holes.

46
Q

To forward-bias a diode:

A

The anode voltage must be positive with respect to its cathode.

47
Q

When used as a voltage regulator, a zener diode is normally?

A

Reverse-biased.

48
Q

A semiconductor device, commonly used in amplifier circuits or as a switch of electronic signals.

A

Transistor.

49
Q

In digital circuits, meaning that operations are not executed in step with the clock.

A

Asynchronous.

50
Q

In an RC low-pass filter, the output is taken across the?

A

Capacitor.

51
Q

Which of the following is not one of the three basic sections of a relay?

A

Magnetic.

52
Q

(1001) is binary for which number?

A

9.

53
Q

A bipolar junction transistor has?

A

Two p-n junctions.

54
Q

When adding or subtracting complex numbers, all numbers must be in?

A

Rectangular form.

55
Q

The region of a bipolar transistor that sends the current carriers to the collector.

A

Emitter.

56
Q

A good crystal band-pass filter for a single-sideband phone would be?

A

2.1 KHz.

57
Q

A logic device that translates from binary code to decimal.

A

Decoder.

58
Q

If you have no power to the primary circuit of your relay, which of the following would not be a possible solution for troubleshooting?

A

Make sure the spring is not broken.

59
Q

This type of coupling is used to amplify much higher frequencies. The gain resistor is replaced with an inductor.

A

LC coupling.

60
Q

On the schematic symbol of a pnp transistor.

A

The arrow points in on the emitter lead.

61
Q

The result of changing a waveshape so its amplitude is no longer proportional to the original amplitude.

A

Amplitude distortion.

62
Q

Characteristic of the crystal that changes mechanical energy into electrical energy and/or electrical energy into mechanical energy is?

A

Piezoelectric effect.

63
Q

If you have no power to the secondary circuit of your relay, which would not be a possible solution for troubleshooting?

A

Make sure the spring is not broken.

64
Q

How many bits are in one Byte?

A

8.

65
Q

Electronic component that does not amplify or rectify.

A

Passive component.

66
Q

The impedance of a series LC circuit at resonance is?

A

Minimum.

67
Q

The charging and recharging of an LC Oscillator is called?

A

Flywheel effect.

68
Q

The input stage of every op amp is a?

A

Differential amplifier.

69
Q

Digital circuit that will add two bits and output a sum and carry. Cannot handle carry inputs.

A

Half-adder.

70
Q

A fundamental binary storage device, sometimes called flip-flop?

A

Latch.

71
Q

Which region in a transistor is the most heavily doped?

A

The emitter region.

72
Q

This oscillator uses a physical piezoelectric crystal that produces the output frequency.

A

Crystal Oscillator.

73
Q

In a high-pass filter, the shunt component does what?

A

Attenuates all frequencies below the cut off.

74
Q

A semiconductor element used for transistors and diodes.

A

Germanium.

75
Q

An actuator which converts electrical energy into linear motion.

A

Solenoid.

76
Q

The current at resonance in a series LC circuit is?

A

Maximum.

NCATT Study (27 decks)

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