ASVAB Electronics
About this set
Created by:
TylerPotts on May 15, 2011
Subjects:
Description:
Barron's ASVAB flash cards
by Terry L. Duran
5/9 subjects
35/400 cards
#'s 271-305
Order by
35 terms
Terms | Definitions |
|---|---|
 B | The symbols below represent a (A) Thyristor (B) Resistor (C) Transistor (D) Fuse |
| A | The instrument used to measure electrical resistance is called (A) An ohmmeter (B) An ammeter (C) A voltmeter (D) A wattmeter |
| B | Electricity is defined as the flow of ___ along a ___ (A) electrons, resistor (B) electrons, conductor (C) positrons, conductor (D) neutrons, pathway |
| B | The symbol below represents a ___, which supplies electrical energy (A) Junction (B) Cell (C) Diode (D) Plug |
| D | The symbol below represents a (A) Thyristor (B) Resistor (C) Transistor (D) Fuse |
| A | The symbol below represents a (A) Diode (B) Triode (C) Transducer (D) Switch |
| B | The symbol below represents a (A) Potentiometer (B) Capacitor (C) Battery (D) Transducer |
| B | The symbol below represents a (A) Triode (B) Light emitting diode (LED) (C) Transducer (D) Light sensitive diode |
| C | The symbols below (left to right) represent an ___, ___, ___, and ___. (A) Ammeter, potentiometer, oscilloscope, voltmeter (B) Ampmeter, potentiometer, ohmmeter, voltmeter (C) Ammeter, galvanometer, ohmmeter, voltmeter (D) Ammeter, oscilliscope, ohmmeter, voltmeter |
| A | The symbols below represent different types of (A) Switches (B) Inductors (C) Transistors (D) Transformers |
| C | The property of a circuit that opposes the flow of electrons is (A) Reactance (B) Capacitance (C) Resistance (D) Inductance |
| B | A 120-volt circuit has resistance 6 ohms. How much current is present in the circuit? (A) 0.2 amperes (B) 20 amperes (C) 40 amperes (D) 720 amperes |
| B | When the secondary side of a transformer has more turns than the primary side, the output voltage will be ___ the input voltage. (A) Lower than (B) Higher than (C) The same as (D) The square root of |
| C | Capacitors connected in series obtain a resulting value (A) Greater than the sum of the individual capacitor values (B) Equal to the sum of the individual capacitor values (C) Less than that of the smallest capacitance (D) Produces neutral change in capacitance values |
| C | Another name for a transistor is (A) Integrated circuit (B) Semiconductor (C) Transfer resistor (D) Pettigrew connector |
| C | Current that changes polarity many times per second is called (A) Direct current (B) Reciprocating current (C) Alternating current (D) AC/DC current |
| C | The best reason to use a filter in a power supply is to (A) Convert alternating current to direct current (B) Change direct current to alternating current (C) Even out voltage variations (D) Smooth out power surges |
| B | What is an amplifier? (A) A device that makes audio signals reach farther (B) A device that makes sounds louder by increasing signal strength (C) A device that has extra capacitors to increase amperage (D) A device that increases sound fidelity by decreasing resistance |
| A | A conductor is any material that (A) Has many free electrons (B) Has no free electrons (C) Has free ions (D) Has free protons |
| C | Conventional current flow is from (A) + to + (B) - to + (C) + to - (D) - to - |
| B | An ampere (or "amp" for short) is defined as (A) An electrical flow of 100 volts per second (B) An electrical flow of one coulomb per second (C) The strength of a magnetic field through a capacitor (D) A measurement of the ion flow from a power source |
| D | A watt is the power that gives rise to the production of energy at a rate of (A) 1 joule per minute (B) 1 volt per second (C) 1 amp per second (D) 1 joules per second |
| C | The Greek letter phi (Φ) is used to (A) Indicate ohms (B) Indicate volts (C) Indicate angles or phases (D) Indicate dielectric flux |
| D | The parallel circuit with resistors of 10 ohms, 10 ohms, and 5 ohms has a total resistance of (A) 10 ohms (B) 5 ohms (C) 25 ohms (D) 2.5 ohms |
| C | The symbol for inductance is (A) X(sub)L (B) I (C) L (D) X(sub)C |
| B | Inductive resistance is found by using the formula (A) X(sub)L = 2(pi)FC (B) X(sub)L = 2(pi)FL (C) X(sub)L = R (D) X(sub)L = Z |
| C | A capacitor of 100 microfarads has a capacity of (A) 100 picofarads (B) 10 picofarads (C) 100,000,000 picofarads (D) 10,000 picofarads |
| B | A junction diode is used for (A) Rectifying power-line frequencies and lower currents (B) Rectifying power-line frequencies and higher currents (C) Rectifying higher frequencies at lower currents (D) Rectifying higher frequencies at higher currents |
| C | A 12-volt battery contains how many cells (A) 1 (B) 6 (C) 8 (D) 9 |
| C | A resistor marked "2kΩ" has a value of (A) 1.5 ohms (B) 200 ohms (C) 2,000 ohms (D) 2,000 watts |
| C | What is the total resistance in this circuit if all resistors are 300 ohms? (A) 900 watts (B) 1,200 ohms (C) 900 ohms (D) 600 ohms |
| B | A carbon resistor marked with colored bands of (left to right) red, brown, orange, and gold is what value and tolerance? (A) 2,100 ohms ±5% (B) 21,000 ohms ±5% (C) 21 ohms ±5% (D) 210 ohms ±5% |
| C | A signal's frequency is inversely proportional to its (A) Amplitude (B) Phase (C) Period (D) Oscillation |
| B | An oscillator is (A) A device that measures the waves of varying electrical signals (B) An electronic circuit that produces a regularly varying electrical signal from a direct current (C) A device that performs mathematical operations using an analog signal (D) A device that keeps output voltage from oscillating beyond a desired level |
| B | Resistance in a circuit is changed from 50 ohms to 25 ohms. If the voltage in the circuit remains the same, what will happen to the current? (A) The current will stay the same (B) The current will double (C) The current will decrease by half (D) Not enough information to tell |
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