ASVAB TEST 12 - Electrical Knowledge

The symbol above represents a __________. thyristor. resistor. transistor. fuse.

The FM band covers __________. 550 to 1,600 kHz. 88 to 108 MHz. 100 to 200 MHz. 550 to 1600 MHz.

The two most commonly used metals in solder are __________. tin and gold. tin and lead. gold and nickel. gold and lead.

A properly soldered connection will appear __________. shiny. dull. dark. greasy.

Which electronic component can store charge?. a transistor. a transformer. a resistor. a capacitor.

Most wires are made from __________. copper. gold. aluminum. silver.

Most 12V car battery are made up of six individual cells connected in series. What is the voltage of each cell in a car battery?. 2V. 3.5V. 6V. 12V.

What is the frequency of the alternating voltage and current typically used in the United States?. 40hz. 50hz. 60hz. 110hz.

What should the temperature of a typical soldering iron be when joining two wires together?. 200 to 300 degrees Fahrenheit. 400 to 500 degrees Fahrenheit. 500 to 600 degrees Fahrenheit. 700 to 800 degrees Fahrenheit.

What is the voltage across the load R and the current through R when the switch is open in the following circuit?. The current is 0A; the voltage is 10V. The current is 2A; the voltage is 10V. The current is 2A; the voltage is 2V. The current is 0A; the voltage is 0V.

Which of the following is NOT needed to produce electrical power from fossil fuels?. a dam. steam. heat. a turbine.

An AA battery produces a potential difference of 1.5V. Four AA batteries are placed in series to power a portable FM radio. What is the total voltage of the radio?. 0.75V. 1.5V. 3.0V. 6.0V.

Two 8-ohm speakers are connected in parallel to an amplifier with a 24-volt output. What is the voltage across each speaker?. 6 volts. 12 volts. 18 volts. 24 volts.

Which function does the receiving antenna provide in radio communication?. It catches the signal out of the air. It separates the carrier wave from the signal. It mixes the signal and the carrier wave. It broadcasts the signal over the air.

A current meter is connected to a circuit as shown. What does the current meter read?. 3.0 amperes. 4.5 amperes. 13.5 amperes. 15 amperes.

An oscilloscope is typically used to analyze __________. resistance. power in a circuit. complex waveforms. simple circuits.

Printed circuit boards are typically made out of __________. laminated paper. fiberglass. copper. glass.

The rate of electrons through a conductor is measured in units of ___________. current. electricity. volts. amperes.

Which of these is an acceptable symbol used for amperes?. Ampo. M. Am. A.

Current is measured using ___________. wires. an ammeter. a currentometer. a spectrometer.

The two types of electrical current are ___________. direct and changing. backwards and forwards. simple and complex. direct and alternating.

32 cycles per second is equivalent to ___________. 32 ohms (ג„¦). 32 positons (pe). 64 hertz (Hz). 32 hertz (Hz).

Electrical resistance is best defined as ___________. opposition to the flow of current. the time it takes for electricity to travel 10,000 miles. ease of an electrical current through a conductor. oscillation of the flow of an electrical current.

To measure voltage, one would use ___________. a volt gauge. a voltmeter. a volta. an electrical difference machine.

Voltage is also known as ___________. electrical potential. current charge. shock factor. electronic strength.

Electrical "pressure" is also known as ___________. charge. conductivity. voltage. ohms.

An ampere is defined as one __________ flowing past a point in one second. coulomb. hertz. ohm. volt.

A galvanometer is usually used to measure ___________. volts. current. conductance. resistance.

Electromotive force is another word for ___________. ohms. volts. amps. current.

Ohm's Law is defined as ___________. E = I ֳ— R (Electrons = Integrated circuits ֳ— Resistance). E = I ֳ— R (Ohms = Intensity ֳ— Regulated flow). E = I ֳ— R (Volts = Current ֳ— Resistance). E = I ֳ— R (Electromotive force = Ions ֳ— Resistance).

Electrical power is expressed in ___________. ohms. volts. watts. current.

A series circuit would best be described as ___________. an electrical circuit with only a single path for the electrical current. an electrical circuit with multiple paths for the electrical current. an electrical circuit with no path for the electrical current. an electrical circuit with two paths for the electrical current.

Given a series circuit, a break at any point in the circuit would cause ___________. the current to double in power. the current to jump the break and continue flowing. the current to stop flowing. the current to go in reverse.

In residential wiring, the internal grounds will be connected to an external ground, also known as ___________. extra ground. Earth ground. safe ground. dirt ground.

In an electrical circuit, if one wanted to reduce the current and/or divide the voltage, one would use a ___________. rectifier. reducer. reflector. resistor.

A capacitor is also known as ___________. a resistor. a dielectric. a condenser. an alternator.

A capacitor is used to perform which of these in an electrical circuit?. reduce current. store an electrical charge. increase voltage. prevent shock.

The farad is the unit of measurement of ___________. capacitance. voltage. resonance. ohms.

Induction is measured in ___________. Henries. ohms. Franks. joules.

A semiconductor describes elements that have __________ electrons in their valance shell. 3. 4. 2. 1.

Which of these elements is considered a semiconductor?. sulfur. magnesium. argon. silicon.

Transistors are known as being solid-state. This means ___________. transistors have no moving parts and all of their electricity exists in their material. transistors are very reliable and are generally ג€solidג€. transistors never change state once set. transistors carry no state information between charges.

The two types of transistors are ___________. PNP and NPN. PPP and NNN. ABC and BCA. CBC and PRN.

The primary components in a bipolar junction transistor are the collector, the base and the ___________. emitter. charger. dispenser. emulcifier.

When an electric current passes through a wire, a __________ field is generated around the wire. charged. magnetic. positive. negative.

Winding wire into a coil will have what effect on the magnetic field in the wire?. The magnetic field will be removed. There will be no change. It will make it stronger. It will make it weaker.

Components of an electrical circuit that resist a change in the flow of current are known as ___________. self-inducing agents. selfers. inductors. inducers.

1.5 volts sent through a 20Kג„¦ resistor would result in __________ of current. 7.5 milliamperes. 0.075 milliamperes. 75 milliamperes. 0.000075 milliamperes.

How many volts does it take to send 99 amps of current through 99,000 ohms of resistance?. 0.009801 volts. 980.1 megavolts. 9.801 megavolts. 98.01 volts.

The largest subatomic particle with a positive charge is called the ___________. neutron. positron. electron. proton.