test study 2

Question 1

In a schematic diagram, how is current flow always portrayed on a transistor when it is forward biased?

Answer 1

Against the arrow

Question 2

The two basic purposes of a transistor are either to perform as a…?

Answer 2

Switch or amplify a circuit

Question 3

A Zener diode is specifically designed to operate in…?

Answer 3

Reverse bias mode

Question 4

What power supply circuit senses changes in output voltages and compensates for the changes, usually within plus or minus 0.1 percent?

Answer 4

Regulator

Question 5

What wave shaping circuit ties down the upper or lower extremity of a waveform to a fixed direct current (DC) potential?

Answer 5

Clamping

Question 6

Which is not a conventional problem that microwave tubes overcome in order to be used in high power, high frequency oscillators and amplifiers?

Answer 6

Inter-cathode resistance

Question 7

On a transmission line with an open termination, the wave is reflected back to the source and…?

Answer 7

There would be significant signal loss

Question 8

What data bus was originally developed for military avionics applications?

Answer 8

Military Standard (MIL-STD)-1553

Question 9

Energy travels through a waveguide because of…?

Answer 9

Interaction of magnetic and electrical fields

Question 10

Three devices used to inject or remove energy from waveguides are known as…?

Answer 10

Probes, loops, and slots

Question 11

When the modulation signal and carrier signal are combined within a modulator, the output signal contains the…?

Answer 11

Carrier, upper sideband, and lower sideband

Question 12

Reducing modulation to less that 100 percent results in…?

Answer 12

No reduction is carrier power

Question 13

The oscillator output in a frequency modulation (FM) modulator increase in frequency with each…?

Answer 13

Positive half cycle of the modulating signal

Question 14

The formula to find the modulating index is…?

Answer 14

Deviation / modulation frequency

Question 15

In phase modulation, the rate of phase shift is…?

Answer 15

Proportional to the frequency of the modulation signal

Question 16

Space modulation is commonly referred to as…?

Answer 16

Difference in the depth modulation (DDM)

Question 17

What is the first step in the pulse code modulation (PCM) process?

Answer 17

Band-limiting the analog signal

Question 18

How does synchronous transmission reduce the overhead costs of data transmission?

Answer 18

Blocks many characters together for transmission

Question 19

Which method of transmission required the receiving end to be synchronized with the transmitting commutator?

Answer 19

Time division multiplexing

Question 20

When using forward error control as a method of error correction, error correcting takes place…?

Answer 20

At the receiving end

Question 21

Which statement describes an advantage of using fiber optic (FO) cables?

Answer 21

Electromagnetic fields do not affect fiber optic cables

Question 22

One disadvantage to using fiber optic (FO) cables is that…?

Answer 22

Nuclear radiation can darken the optical fiber and cause signal loss

Question 23

What component of a fiber optic (FO) cable provides the reflective surface that allows light to propagate?

Answer 23

Cladding

Question 24

When considering light wave prolongation, what is the name of the angle between the normal in the first material and the ray that is bounced back in the first material?

Answer 24

Angle of reflection

Question 25

What logarithmic expression do we use to specify the ratio of power loss in fiber optic (FO) cables?

Answer 25

Decibels-per-kilometer