NEETS MODULE 21 CHAPTER 1 BASIC MEASUREMENTS
Q-1. What assures the accuracy of your electronic test equipment?
Q-2. The input impedance of your test equipment should exceed the impedance of the circuit undertest by what ratio?
Q-3. What are the advantages of using two voltmeters in series?
Q-4. At what point on a meter movement are the most accurate readings taken?
Q-5. What are the advantages of using a differential voltmeter?
Q-6. The frequency response of test equipment refers to what aspect of ac voltage measurements?
Q-7. Ideally, an oscilloscope presentation should cover what vertical portion of the screen?
Q-8. What are the advantages of connecting ammeters in parallel when performing currentmeasurements?
Q-9. What is the primary advantage of using a current probe?
Q-10. How do you compensate for the resistance of the test leads of a meter?
Q-11. Why are digital multimeters well suited for testing sensitive devices?
Q-12. Charged capacitors can kill. True or false?
Q-13. Which is more accurate, the bridge- or reactance-type meter?
Q-14. What type of core produces the greatest inductance?
Q-15. A Hay bridge measures inductance by comparing an inductor to what component?
Q-16. Is the current flow through an inductor directly proportional or inversely proportional to itsinductance value?
NEETS MODULE 21 CHAPTER 2 COMPONENT TESTING
Q-1. Why are most ships limited in their ability to stock replacement modules for repair of electronicequipment?
Q-2. What is the most common cause of electron tube failure?
Q-3. What is the most accurate method of determining the condition of an electron tube?
Q-4. Normally, how are high-power rf tubes tested?
Q-5. What should you do if a klystron becomes gassy?
Q-6. When used as an amplifier, what is the best indication that a twt is operating properly?
Q-7. What is the major advantage of a transistor over a tube?
Q-8. Name two major disadvantages of transistors
Q-9. When you are using an ohmmeter to test a transistor, what range settings should be avoided?
Q-10. At approximately what minimum voltage potential should you be able to feel an electrostaticdischarge?
Q-11. A MOSFET can be damaged by an electrostatic discharge at approximately what minimumpotential?
Q-12. Why should you avoid using ac-powered test equipment when wearing a wrist strap?
Q-13. Prior to substituting a diode, what measurements should you take to determine its condition?
Q-14. As a rule of thumb, what is an acceptable ratio of back-to-forward resistance for a diode?
Q-15. When testing an SCR with an ohmmeter, the SCR will conduct if what two elements are shortedtogether?
Q-16. When a Triac is properly gated, what is/are the direction(s) of current flow between anodes 1and 2?
Q-17. Why is it not advisable to use a solder sucker when working on MOSFETs?
Q-18. Name two advantages in using ICs.
Q-19. Why should you consider an IC as a black box?
Q-20. What are the two logic states of an IC?
Q-21. A lighted LED on a logic clip represents what logic level?
Q-22. What does a lighted LED indicate on a logic comparator?
Q-23. What is the purpose of a logic probe?
Q-24. Emergency eyewash facilities must be located within what minimum number of feet of an eyehazardarea?
Q-25. What is the advantage of using a battery test set versus a voltmeter to test batteries?
Q-26. At what voltage is a NICAD battery considered to be fully discharged?
Q-27. What is the most common method of testing a fixed rf attenuator?
Q-28. What is the most common method of testing resistive terminations?
Q-29. What is the main disadvantage of using fiber-optic cables?
Q-30. What two features make the Huntron Tracker 2000 a widely used troubleshooting tool?
Q-31. What is the most preferred method of troubleshooting?
Q-32. Why is it recommended to use more than one range while troubleshooting a device?
Q-33. When you are testing individual components in a circuit, what may cause a defective componentto appear good?
NEETS MODULE 21 CHAPTER 3 QUANTITATIVE MEASUREMENTS
Q-1. What conditions must be met in order to balance a bridge circuit?
Q-2. When you are measuring a component using a bridge, what is the most common cause ofinaccurate measurements?
Q-3. How does the supply voltage affect the accuracy of Wheatstone bridge measurements?
Q-4. Kelvin bridges are well suited for what type of measurements?
Q-5. When you are testing an inductor with a Hay bridge, the characteristics of the inductor arecompared with what type of device?
Q-6. What do impedance-angle meters and vector bridges have in common?
Q-7. What is the result of an impedance mismatch between a receiver or transmitter and itstransmission line or antenna?
Q-8. What are the three units of measure most commonly used when referring to af powermeasurements?
Q-9. In reference to dB meters, 0 dBm represents 1 milliwatt into what value of load?

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Q-10. What is the main difference between a vu and a dB meter?
Q-11. What type of device is used to extend the current-measuring capability of electrodynamic wattmeters?
Q-12. For power measurements, what advantage does an electronic wattmeter have over an electrodynamic wattmeter?
Q-13. What is the advantage of using in-line wattmeters over output power meters?
Q-14. What type of material is used in the construction of bolometers and thermistors?
Q-15. Power measurements performed with calorimeters are based on what three variables?
Q-16. What is the result of applying power to a calorimeter?
Q-17. What government agency is responsible for monitoring our primary frequency standards?
Q-18. What is the primary measurement application for tuning forks?
Q-19. If you are required to monitor the speed of a device with a stroboscope over an extended periodof time, what step should be taken to prolong the life of the flasher tube?
Q-20. What happens when a frequency meter is adjusted to the frequency of the signal being measured?
NEETS MODULE 21 CHAPTER 4 QUALITATIVE MEASUREMENTS
Q-1. At what points along a transmission line will a neon lamp glow the brightest?
Q-2. What vswr is a perfect match between a transmitter and its load?
Q-3. What are the two common causes of transmission-line deterioration?
Q-4. Is it possible for a transmission line to operate improperly at certain frequencies and properlyat others?
Q-5. What factor has the greatest effect on the physical size of a coaxial cable?
Q-6. Is the attenuation of a coaxial cable independent of frequency?
Q-7. What is the main cause of intermodulation distortion?
Q-8. When you are testing a piece of equipment for intermodulation distortion, what should theoutput of the equipment look like?
NEETS MODULE 21 CHAPTER 5 INTRODUCTION TO WAVEFORM INTERPRETATION
Q-1. What is the result of overmodulating an AM signal?
Q-2. For AM transmissions, the carrier is normally modulated within what range?
Q-3. What is meant by frequency deviation?
Q-4. A spectrum analyzer is designed to display what signal characteristic?
Q-5. What is the advantage of single-sideband (ssb) transmission over AM transmission?
Q-6. What happens to an fm signal as you increase the frequency of the modulating signal?
Q-7. When referring to spectrum analyzers, what is meant by the term resolving signals?
Q-8. Why are time-domain reflectometers often compared to a radar system?
Q-9. What is the main advantage of using a time-domain reflectometer (tdr) to test a transmissionline?
Q-10. What is the purpose of swept-frequency testing?
Q-11. In swept-frequency testing the impedance of a transmission line, what electrical characteristicis actually being measured?
Q-12. What precautions must be taken when sweeping a transmitting antenna?
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