CETa EXAM AND PRACTICE EXAM ACTUAL EXAM 300
QUESTIONS AND CORRECT DETAILED ANSWER
VGA - ANSWER: 640 x 480
256 Colors
15 Pins
SVGA - ANSWER: 800 x 600
256 Colors
15 Pins
XGA - ANSWER: 1024 x 768 or 1366 x 768
16 mil, HD Colors
15 Pins
Widescreen - ANSWER: 1280 x 720 or 1920 x 1080
DVI or HDMI Connectors
Random Access Memory - ANSWER: RAM
Read Only Memory - ANSWER: ROM
Programmable Read Only Memory - ANSWER: PROM
Electrical Programmable Read Only Memory - ANSWER: EPROM
Electrically Erasable PROM - ANSWER: EEPROM
50 Ohms - ANSWER: Impedance generally used in radio communications
RF Section - ANSWER: Part of radio receiver, receives incoming RF electrical-
magnetic signal. Very broad banded, amplifies input signals. Most noise is
produced here.
Mixer - ANSWER: Part of radio receiver, heterodynes received signal with signal
produced by local oscillator circuit. Output contains the sum and difference
frequencies.
IF Section - ANSWER: Part of radio receiver, uses a set frequency throughout.
Amplifies desired tuned frequency.
10.7 MHz - ANSWER: Commonly used FM Radio Frequency
44 MHz - ANSWER: Commonly used Television Frequency
, 1.6, 3.35, 9, and 40 MHz - ANSWER: Commonly used Short Wave Radio Frequencies
Detector Circuit - ANSWER: Part of radio receiver, made of a diode; rectifies
incoming RF signal.
AGC/AVC Section - ANSWER: Part of radio receiver, samples the signal at the
detector and develops a control voltage that is fed back to the first IF Amp. Ideally,
amplifies weak incoming signals and attenuates strong ones, allowing a constant,
desirable output volume.
AF Section - ANSWER: Part of radio receiver, audio amplification network that
drives speakers. The load must match the radio's circuitry with proper impedance
matching.
Dipole - ANSWER: Used as reference and as a comparison in measuring "gain" of
another antenna.
Yagi - ANSWER: "Beam" antenna that focuses all of its energy in a narrow
beamwidth. The more director elements present, the higher the gain rating and
narrower beam width.
D Layer - ANSWER: Approximately 30-50 miles above the earth, most prevalent
during daylight hours. Absorbs radio signals under 10 MHz.
E Layer - ANSWER: Approximately 60-90 miles above the earth, picks and chooses
both High Frequency and Very High Frequency signals to reflect back to earth
based on frequency used and time of day.
F Layer - ANSWER: Approximately 250 miles and above the earth, reflects most
High Frequency signals back to the earth.
Extremely Low Frequency - ANSWER: 30-300 Hertz
Super Low Frequency - ANSWER: 300 Hertz-3 Kilohertz
Very Low Frequency - ANSWER: 3 Kilohertz-30 Kilohertz
Low Frequency - ANSWER: 30 Kilohertz-300 Kilohertz
Medium Frequency - ANSWER: 300 Kilohertz-3 Megahertz
High Frequency - ANSWER: 3 Megahertz-30 Megahertz
Very High Frequency - ANSWER: 30 Megahertz-300 Megahertz
Ultra High Frequency - ANSWER: 300 Megahertz-3 Gigahertz
QUESTIONS AND CORRECT DETAILED ANSWER
VGA - ANSWER: 640 x 480
256 Colors
15 Pins
SVGA - ANSWER: 800 x 600
256 Colors
15 Pins
XGA - ANSWER: 1024 x 768 or 1366 x 768
16 mil, HD Colors
15 Pins
Widescreen - ANSWER: 1280 x 720 or 1920 x 1080
DVI or HDMI Connectors
Random Access Memory - ANSWER: RAM
Read Only Memory - ANSWER: ROM
Programmable Read Only Memory - ANSWER: PROM
Electrical Programmable Read Only Memory - ANSWER: EPROM
Electrically Erasable PROM - ANSWER: EEPROM
50 Ohms - ANSWER: Impedance generally used in radio communications
RF Section - ANSWER: Part of radio receiver, receives incoming RF electrical-
magnetic signal. Very broad banded, amplifies input signals. Most noise is
produced here.
Mixer - ANSWER: Part of radio receiver, heterodynes received signal with signal
produced by local oscillator circuit. Output contains the sum and difference
frequencies.
IF Section - ANSWER: Part of radio receiver, uses a set frequency throughout.
Amplifies desired tuned frequency.
10.7 MHz - ANSWER: Commonly used FM Radio Frequency
44 MHz - ANSWER: Commonly used Television Frequency
, 1.6, 3.35, 9, and 40 MHz - ANSWER: Commonly used Short Wave Radio Frequencies
Detector Circuit - ANSWER: Part of radio receiver, made of a diode; rectifies
incoming RF signal.
AGC/AVC Section - ANSWER: Part of radio receiver, samples the signal at the
detector and develops a control voltage that is fed back to the first IF Amp. Ideally,
amplifies weak incoming signals and attenuates strong ones, allowing a constant,
desirable output volume.
AF Section - ANSWER: Part of radio receiver, audio amplification network that
drives speakers. The load must match the radio's circuitry with proper impedance
matching.
Dipole - ANSWER: Used as reference and as a comparison in measuring "gain" of
another antenna.
Yagi - ANSWER: "Beam" antenna that focuses all of its energy in a narrow
beamwidth. The more director elements present, the higher the gain rating and
narrower beam width.
D Layer - ANSWER: Approximately 30-50 miles above the earth, most prevalent
during daylight hours. Absorbs radio signals under 10 MHz.
E Layer - ANSWER: Approximately 60-90 miles above the earth, picks and chooses
both High Frequency and Very High Frequency signals to reflect back to earth
based on frequency used and time of day.
F Layer - ANSWER: Approximately 250 miles and above the earth, reflects most
High Frequency signals back to the earth.
Extremely Low Frequency - ANSWER: 30-300 Hertz
Super Low Frequency - ANSWER: 300 Hertz-3 Kilohertz
Very Low Frequency - ANSWER: 3 Kilohertz-30 Kilohertz
Low Frequency - ANSWER: 30 Kilohertz-300 Kilohertz
Medium Frequency - ANSWER: 300 Kilohertz-3 Megahertz
High Frequency - ANSWER: 3 Megahertz-30 Megahertz
Very High Frequency - ANSWER: 30 Megahertz-300 Megahertz
Ultra High Frequency - ANSWER: 300 Megahertz-3 Gigahertz
