Q.1

With surface-mount technology (SMT), the devices should:

  • utilize transistor outline connections
  • mount directly
  • have parallel connecting pins
  • require holes and pads
Q.2

To forward bias a diode, a ________ potential is needed on the ________ and a ________ is needed on the ________.

  • negative, cathode, positive, anode
  • negative, anode, positive, cathode
Q.3

What is the output voltage from the circuit in the given figure?

  • +15 V
  • +12 V
  • +3 V
  • 0 V
Q.4

In a graphical representation of voltage versus time, ________ is displayed on the ________ axis and ________ is displayed on the ________ axis.

  • time, y, voltage, x
  • voltage, y, time, x
Q.5

The family of logic that is composed of bipolar junction transistors is ____.

  • TTL
  • CMOS
  • DIP
  • BJT
Q.6

Which device(s) have almost ideal ON and OFF resistances?

  • electromechanical relays
  • manual switches
  • semiconductor devices (diodes and transistors)
  • electromechanical relays and manual switches
Q.7

To forward bias a diode, a ________ potential is needed on the ________ and a ________ is needed on the ________.

  • negative, cathode, positive, anode
  • negative, anode, positive, cathode
Q.8

The family of logic that is composed of bipolar junction transistors is ____.

  • TTL
  • CMOS
  • DIP
  • BJT
Q.9

Why, in most applications, are transistor switches used in place of relays?

  • They consume less power.
  • They are faster.
  • They are quieter and smaller.
  • all of the above
Q.10

What can a relay provide between the triggering source and the output that semiconductor switching devices cannot?

  • total isolation
  • faster
  • higher current rating
  • total isolation and higher current rating
Q.11

A diode placed in parallel across a relay coil serves what function?

  • to regulate input voltage
  • to protect the coil from arcing
  • to ensure most of the current passes through the coil
  • to reduce arcing across the relay contacts
Q.12

Serial communication can be sped up by:

  • using silver or gold conductors instead of copper
  • using high-speed clock signals
  • adjusting the duty cycle of the binary information
  • using silver or gold conductors instead of copper and high-speed clock signals
Q.13

Determine the output voltage Vout for the circuit in the given figure.

  • –0.5 V
  • 0 V
  • +5 V
  • +4.3 V
Q.14

What is the period of a clock waveform that has a frequency of 15.4 kHz?

  • 649 s
  • 6.49 s
  • 64.9 s
  • 0.649 s
Q.15

Why does the TTL family use a totem-pole circuit on the output?

  • It provides active pull-up.
  • It provides active pull-down.
  • It provides active pull-up and active pull-down.
Q.16

The ability to manufacture smaller, more dense components has been fulfilled by SMD.

  • True
  • False
Q.17

Manual switches and relays have identical ON and OFF resistances.

  • True
  • False
Q.18

An electromechanical relay is operated manually.

  • True
  • False
Q.19

Serial communications cannot be sped up.

  • True
  • False
Q.20

The hexadecimal number 4B16 is transmitted as an 8-bit word in parallel. What is the time required for this transmission if the clock frequency is 2.25 MHz?

  • 444 ns
    mu.gif
    mu.gif
  • 444 s
  • 3.55 s
  • 3.55 ms
0 h : 0 m : 1 s