CETA Exam Questions And
Answers
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 abo
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