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NAVEDTRA 14193A
TEST METHODS AND PRACTICES CH 1 ET2 BIBS MAR 2017
| Question | Answer |
|---|---|
| Input impedance of the voltmeter should exceed the impedance of the circuit by a ratio of at least what? | 10 to 1 |
| The average value of a DC waveform can vary from 63.6% of peak value for a rectified full sine wave to what percent of peak value for a triangular wave? | 50% |
| The Simpson 260 analog multimeter is capable of measuring both AC and DC voltages of up to how many volts? | 5000v |
| When performing measurements with any analog multimeter, remember that the most accurate readings are taken with the pointer at what location? | midscale |
| What is defined as the apparent displacement of the position of an object because of the difference between two points of view? | parallax |
| What are primarily designed for waveform observation and are typically less accurate than other pieces of test equipment used to measure DC voltages? | oscilloscopes |
| Most analog voltmeters in common use today are accurate to approximately what percent of full-scale reading? | +/-2% |
| The digital multimeter in most cases provides an accuracy of at least what percent? | +/-0.1% |
| In standard oscilloscopes, the vertical amplifier input impedance is generally greater than what, making it possible to measure voltages in high impedance circuits? | 1 megohm |
| Most commonly used oscilloscopes have a frequency response from DC up to what? | 100 MHz |
| The upper frequency limitations of digital multimeters vary from 20KHz to over what? | 300Khz |
| What method of measuring ac voltage is the most accurate of the common measurement techniques? | differential voltmeter |
| Most analog multimeters cannot be used for measuring AC current and are only accurate to within what percent on DC ranges? | +/-2% |
| The Fluke 8000A digital multimeter is accurate to within +/- 0.3% when measuring DC current and what percent when measuring AC current? | +/- 1% |
| What is designed to indicate the presence of current and the relative magnitude of one source of current as compared to another? | current tracer |
| Current probes can be divided into three basic types: passive, active, and what else? | hall effect |
| Meggers produce the large voltages that are required to measure extremely high resistances as high as what? | 10,000 megohms |
| The Fluke 893 AC-DC differential voltmeter can be used for measuring extremely high resistances from 10 megohms to 106 megohms with typical accuracy of what? | +/-5% |
| What is that property of a circuit that produces an electrostatic field when two conducting bodies separated by a dielectric material have a potential applied to them? | capacitance |
| What is the basic measurement of capacitance? | Farad |
| What is the amount of current flow maintained at 1 ampere that passes a given point of a circuit in 1 second? | 1 coulomb |
| Capacitance measurements are usually accomplished by either a bridge-type or a what other type of capacitance meter? | reactance-type |
| What is the ratio of the energy dissipated to the energy stored in a capacitor? | dissipation factor |
| What is the ability of a coil to function as a storehouse of energy in magnetic form and is determined by the shape and dimensions of the coil? | inductance |
| What measures inductance by comparing it with a capacitance and (effectively) two resistances? | Maxwell bridge |
Created by:
nng7294
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