CETA Exam Questions And Answers

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.