Associate CET Practice Exam - Questions and Answers

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Associate CET Practice Exam - Questions and Answers A schematic used in electronic servicing: is much like a road map for following signals High voltage should be discharged before servicing a produ ... ct. After disabling. After disabling AC input power, discharge an HV PS by: draining through a large value resistor to chassis ground Which of these would be an important electrical consideration in the use of a transformer? The operating frequency If a 12v product is dissipating 50w, how much load resistance does the device represent? 2.9 ohms An "audio signal" is often defined as: frequencies in the 20 Hz to 15,000 Hz range _____________ will cause a generator to produce DC voltage rather than AC. The communtator You suspect the unit has an internal short. To prevent further damage when you apply power, you should: insert a low resistance high wattage (100 ohm, 10w) resistor in series with the power input A ripple counter: is two or more logical flip-flops connected sequentially with the input pulses toggling the first When a voltage is applied to a capacitor: current is maximum at first, then reduces as the capacitor becomes charged An electrolytic capacitor in series between the power transformer and the rectifiers in a power supply: is part of a voltage doubler circuit Information travels through optic fiber via the flow of: Photons You would most likely prefer an analog VOM over a DMM for: intermittent fluctuations Which of these circuits would most likely use a Zener diode? a power regulator A block in a digital diagram is called a NOR. Which is true? It is a NOT OR or inverted OR Which of these statements is most true relating to schematic diagrams of electronic devices? They represent signal paths In personal computer technology, ROM indicates: memory that may only be read from A light emitting diode will light when: it is forward biased A zener diode is rated 6.3 v. This tells you: it conducts to limit voltage across it to 6.3 v A triac is frequently used: to electronically turn equipment on and off A technician must be knowledgeable about "ESD": because static discharge can destroy many components In a motor, the counter emf voltage induced in the armature ________ the source current. causes a decrease in One significant difference between a TV antenna and a CB antenna would be: TV is polarized horizontal while CB is vertical Switching power supplies: are sometimes called DC to DC converters Which of these would you likely find in a DC motor speed control circuit? an op-amp A transformer on a schematic has two leads connected to the primary and three to the secondary, one on each end and one in the middle. This is a center tapped secondary transformer The 9 pin DB9 connector serial port on a PC is commonly called the ______ standard. RS232 Three capacitors, of 470 pf, 560 pf and .47 pf are in parallel with each other. The total is: 1030.47 pf Ohm's law provides equations relating to: volts, amps, and resistance A power source such as a generator to what component in a water supply system? A pump Which of these is a good indication of the quality of an analog meter? the ohms per volt rating The vertical axis of an oscilloscope display is also called the: Y axis If you increase the value of an inductor, the inductive reactance will: Increase Which would least likely be a high voltage (above 1,000v) capacitor? Electrolytic The rechargeable cells currently used in many consumer portable products would be: Lithium ion A solid stat regulator: varies conduction to maintain a level output voltage A current carrying conductor is placed in a magnetic field perpendicular to the lines flux. It tends to move in_________ direction to the force of magnetic lines of flux, as determined by flemings left hand rule. a perpendicular The antenna used to compare the gain of other antennas is called _______________. Dipole The component that effectively becomes a short when turned on, and is turned off by disconnecting the path from the anode to cathode is the: silicon controlled rectifier Which of these terms would you most expect to see when referring to types of resistors? metal film "Microwave," as used in radio electronics, refers to: 1GHz - 100GHz radio frequencies [Show More]

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