The polarization of the disturbance. TE
C. The polarization of the disturbance. TE
B. The frequency of the disturbance.
D. The medium through which the sound travels.
E. The waveform of the disturbance.
8. Three-dimensional range plotting is generally done in:
A. Linear coordinates.
B. Rectangular coordinates.
C. Polar coordinates.
D. Celestial coordinates.
E. Spherical coordinates.
9. A form of communications in which either party can “hear” while “talking,” thus allowing one party to instantly interrupt the other at any time, is called:
A. Half simplex.
B. Full simplex.
C. Half duplex.
D. Full duplex.
E. Nothing. There is no such mode of communications.
10. Which of the following is an example of wireless technology?
A. The Global Positioning System.
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B. A field-effect transistor.
C. A junction diode.
D. A carbon-composition resistor.
E. Digital-to-analog conversion.
11. A satellite in a LEO system is usually:
A. At an altitude of 22,300 miles.
B. Geosynchronous.
C. In a retrograde orbit.
D. In a polar orbit.
E. Midway between the earth and the moon.
12. Which consideration is the most important in a hi-fi audio amplifier?
A. Power output.
B. Efficiency.
C. Linearity.
D. Input impedance.
E. Output impedance.
13. The microprocessor in a computer is part of the:
A. Random-access memory.
B. Central processing unit.
C. Read-only memory.
D. Hard drive.
E. Internet controller.
14. An RF transducer is:
A. Sensitive only within the range of human hearing.
B. Sensitive only to visible light.
C. An antenna.
D. An analog-to-digital converter.
E. A digital-to-analog converter.
15. Vacuum tubes might be found in:
A. A portable headset tape player.
B. The amplifier used by a band at a rock concert.
C. A meter for measuring sound intensity.
D. A robot controller.
E. A GPS receiver.
16. One kilobyte is the same amount of data as:
A. 1024 bits.
B. 1024 kilobits.
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C. 1024 megabits.
D. 1024 gigabits.
E. None of the above.
17. Hexaphonic sound is not common, but if it were, it would most likely be used for:
A. True three-dimensional hi-fi audio reproduction.
B. Two-way radio communications.
C. Ensuring that an AM/FM tuner can receive at least six stations.
D. Improving the dynamic range of a speaker system.
E. Robot control.
18. Range sensing and range plotting are basically the same thing except for the:
A. Light-detecting sensitivity.
B. Image resolution.
C. Selectivity.
D. Wavelength at which the system functions.
E. Number of dimensions involved.
19. In a component-type hi-fi system, cables connecting the various units should be:
A. As long as possible.
B. Single-conductor only.
C. Connected in parallel.
D. Shielded whenever possible.
E. Connected in series.
20. A radio antenna receives 50 watts of RF power from a transmitter, and radiates
49 watts of that power into space. Which of the following statements is true?
A. The antenna is 98 percent efficient.
B. The loss resistance is 1 ohm.
C. The loss resistance is 1 percent.
D. The ground loss is 1 watt.
E. The antenna feed line loss is 1 watt.
21. The technical expression for robot-arm joint flexibility is:
A. Degrees of rotation.
B. Radians of rotation.
C. Degrees of flexibility.
D. Manipulator flexibility.
E. The work envelope.
22. In an Internet connection, the receiving computer is also known as the:
A. Server.
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B. Host.
C. Peer.
D. Node.
E. Destination.
23. The term refresh rate refers to:
A. The number of times per second that an image is renewed in a computer display.
B. The number of times per second that a computer memory contents change.
C. The speed at which files on a hard drive are overwritten.
D. The number of bits per second transferred in an Internet connection.
E. The time it takes to recharge a nickel-cadmium electrochemical cell.
24. The “brain” of a computer is the:
A. Hard drive.
B. Controller.
C. Microprocessor.