Q.1

An ac wave shape could be a sine wave, square wave, or sawtooth wave.

  • True
  • False
Q.2

A sawtooth voltage waveform has a linear ramp that changes voltage level with respect to time.

  • True
  • False
Q.3

The average value of a sine wave is .707 times the peak value.

  • True
  • False
Q.4

The average value of a sine wave is .707 times the peak value.

  • True
  • False
Q.5

What is the waveform period of a square wave signal that horizontally covers 3 major divisions per cycle? (time/cm = 50 ms)

  • 50 ms
  • 100 ms
  • 150 ms
  • 200 ms
Q.6

The power that is distributed from a power plant to your home is:

  • high voltage to high voltage
  • low voltage to high voltage
  • high voltage to low voltage
  • low voltage to low voltage
Q.7

Which percentages of full-amplitude rise time are used for a pulse wave?

  • 0 to 50 percent
  • 0 to 100 percent
  • 5 to 95 percent
  • 10 to 90 percent
Q.8

Power companies supply ac, not dc, because:

  • it is easier to transmit ac
  • there is no longer a need for dc
  • dc is more dangerous
  • there are not enough batteries
Q.9

What is the name of a device that converts sound waves to electrical waves?

  • an amplifier
  • an antenna
  • a filter
  • a microphone
Q.10

A sine wave has:

  • four quadrants
  • two alternations
  • one period
  • all of the above
Q.11

What is the peak-to peak voltage of a 56 Vrms ac voltage?

  • 158 V
  • 164 V
  • 82 V
  • 79 V
Q.12

A rectangular wave that has a duty cycle of 50 percent could be called a:

  • c wave
  • sawtooth wave
  • square wave
  • triangle wave
Q.13

What is the average value of a 12 V peak wave?

  • 3.82 V
  • 4.24 V
  • 7.64 V
  • 9.42 V
Q.14

If a waveform period is determined to be 10 microseconds in duration, what is the frequency of the signal?

  • 100 Hz
  • 1000 Hz
  • 10 kHz
  • 100 kHz
Q.15

If the frequency of a radio wave is increased, then its wavelength will:

  • increase
  • decrease
  • remain the same
  • cannot tell
Q.16

What is the peak value of a household appliance that uses a 230 V ac source?

  • 163 V
  • 230 V
  • 325 V
  • 480 V
Q.17

AC effective voltage is named:

  • average
  • peak
  • peak-to-peak
  • root mean square
Q.18

One oscilloscope selector knob that allows the major and minor divisions of the graticule to be used to determine a waveform period is called a:

  • focus control
  • time/cm control
  • intensity control
  • volts/cm control
Q.19

What are the two main applications for ac?

  • direct, pulsating
  • electric, magnetic
  • power, information
  • static, dynamic
Q.20

A triangle wave consists of repeating:

  • positive ramps only
  • negative ramps only
  • positive and negative ramps of equal value
  • positive and negative ramps of unequal value
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