The Associate CET Study Guide: 2024 AST Practice EXAM #2: Appendix A Questions and Answers

The Associate CET Study Guide: 2024 AST Practice EXAM #2: Appendix A Questions and Answers A track on a computer removable disk is: A. One record B. Divided into sectors C. Created as data written D. One continuous path - Answer- B. Divided into sectors In PC type computers, extended memory is: A. Memory above the basic 640 K B. Memory above the basic 1 Megabyte C. Added to basic RAM in 1mb blocks D. Adjusted by the start up files - Answer- B. Memory above the basic 1 Megabyte Which video system has the highest resolution? A. EGA B. VGA C. SVGA D. XVGA - Answer- D. XVGA You would want to use a dual trace oscilloscope to measure: A. Signal differences between two points B. Suspected resistance problems in one circuit C. One faulty circuit in voltage level while another is faulty in a current level D. One fault is video and the other is audio - Answer- A. Signal differences between two points Common Intermediate Frequencies (IF's) for AM and FM commercial broadcast receivers are: A. 455 kHZ and 1.2 GHz B. 288 kHZ and 455 kHz C. 455 kHz and 10.7 MHz D. 288 kHz and 10.7 MHz - Answer- C. 455 kHz and 10.7 MHz Analog signal compression: A. Uses D/A converters B. Reduces the high frequency received signal amplitude C. Changes AM to FM D. Primarily reduce background noise levels - Answer- B. Reduces the high frequency received signal amplitude Coaxial cable line losses at RF frequencies are due to: A. Wire resistance, capacitive and inductive reactance B. Wire resistance, dielectric fading and transconductance C. Capacitive and inductive reactance and braid leakage D. Magnetic effects of near by materials - Answer- A. Wire resistance, capacitive and inductive reactance Standard line-level audio signals, such as the output from VCRs, DVD players, satellite receivers and set top boxes, for input to a TV, modulator or other equipment is of what amplitude? A. 100 microvolts peak-to-peak B. 1000 microvolts peak-to-peak C. 1 millivolt peak-to-peak D. 1 volt peak-to-peak - Answer- D. 1 volt peak-to-peak The noise level in a radio receiver is generated mostly in the: A. IF stages B. Local Oscillator C. Audio section D. RF section - Answer- D. RF section The charging rate for a NiCad or Ni-MH battery should not exceed __________% of its AHr, or ampere-hour rating. A. 5 B. 100 C. 25 D. 10 - Answer- D. 10 Which of these in a PC would be part of disk operations? A. Serial port board B. DMA ports C. CGA controller D. SATA or IDE controller - Answer- D. SATA or IDE controller An LED: A. Only emits visible light when forward biased B. Can be used as a fiber optic signal source C. Does not need high current flow protection D. May send or receive light signals - Answer- B. Can be used as a fiber optic signal source A dual-trace oscilloscope may have: A. Two electron guns B. One frequency control C. One set of position controls D. A Z input for intensity modulation - Answer- D. A Z input for intensity modulation