ASVAB Test 11 - Electrical Knowledge

Electromotive force is another way of saying __________. frequency. watts. cycles per second. voltage.

A primary advantage of using a Li-Ion battery instead of a NiMH battery in your cell phone is __________. Li-Ion batteries are lighter. Li-Ion batteries last longer. Li-Ion batteries don't interfere with signal quality. none of the above.

Transistors contain at least three terminals called the __________. base, emitter, and collector. base, positive terminal, and negative terminal. emitter, amplifier, and collector. base and two gates.

To control a light fixture from two different wall switches, you should use __________. a single-pole switch and a four-way switch. two three-way switches. two four-way switches. two single-pole switches.

A transistor is also called a __________. rectifier. cathode. crystal amplifier. semiconductor.

This symbol means __________. ground. resistor. diode. battery.

To decrease capacitance, capacitors __________. should have less voltage applied to them. should be connected in parallel. should be connected in series. should be eliminated.

A resistor marked 2.5K ohms has the value of __________. 2.5 ohms. 250 watts. 2,500 ohms. 25,000 ohms.

A 9-volt transistor contains __________. 1 cells. 6 cells. 9 cells. 3 cells.

The hot wire is always __________. blue. green. whitish. black.

How wide is the full AT motherboard?. 11 inches. 11.5 inches. 12 inches. 12.5 inches.

The above symbol represents a/an __________. relay. on-off switch. push switch. connected wire.

If a 120-volt current is protected by a 25-amp circuit breaker, what's the largest number of watts an appliance can safely use?. 1,200 watts. 1,800 watts. 3,000 watts. 3,600 watts.

The above symbol represents a __________. rheostat. capacitor. relay. potentiometer.

16-gauge wire is __________________ than 12-gauge wire. less flexible. more flexible. thinner. thicker.

A 120-volt circuit has a resistance of 12 ohms. How much current is present in the circuit?. 0.1 amperes. 10 amperes. 20 amperes. 1440 amperes.

When the secondary side of a transformer has more turns than the primary side, the output voltage will be ___________ the input voltage. lower than. higher than. the same as. the square root of.

How much power is being carried in a 220-volt circuit when the current is 10 amps?. 22 watts. 220 watts. 2,200 watts. 4,400 watts.

Capacitors connected in parallel __________. produce less capacitance. produce more capacitance. are capable of handling more voltage. produce a higher WVDC rating.

Another name for a transistor is __________. integrated circuit. semiconductor. transfer resistor. rathbone connector.

Current that changes polarity many times per second is called __________. direct current. oscillating current. alternating current. AC/DC current.

The measurement "mil" refers to __________. a quarter or an inch. one thousandth of an inch. a millionth of an inch. a hundredth of an inch.

A filter is used in a power supply to __________. convert alternating current to direct current. change direct current to alternating current. even out voltage variations. smooth out power surges.

Which of the following contains an electromagnet?. Light switch. Doorbell. Fluorescent lightbulb. Incandescent lightbulb.

Radio frequency amplifiers are used in __________. audio amplifiers. differential amplifiers. operational amplifiers. receivers and transmitters.

A crystal microphone uses __________. the piezoelectric effect. the Doppler effect. magnetic wavicles to operate. a permanent magnet for resonance.

If both the resistors shown (R1 and R2) in the diagram below are of equal size, what is the voltage at the arrow?. 9V. 12V. 18V. 24V.

A crossover network is used to __________. direct the proper frequency range to the right speaker. eliminate noise. filter out high frequencies. filter out low frequencies.

The klystron is used in __________. low-frequency transmitters. radar units. audio frequency amplifiers. frequency detectors.

The two basic types of oscillators used for microwave generation are the magnetron and the __________. klystron. op amp. clapp oscillator. multivibrator.

The two types of diodes used in electronics work are the semiconductor diode and the __________. vacuum tube diode. full-wave diode. half-wave diode. zener diode.

Analog color television relies on three colors to produce the full color range needed for a good picture: red, blue, and __________. gray. orange. yellow. green.

The folded dipole antenna has an impedance of __________. 72 ohms. 300 ohms. 600 ohms. 75 ohms.

The symbol below is used in electrical diagrams to represent a __________. resistor. capacitor. transformer. transistor.

Electricity is defined as __________. the flow of electrons along a conductor. the flow of ions along a conductor. the movement of charges. static electricity.

A conductor is any material that __________. has no free electrons. has many free electrons. has free ions. has free protons.

Convention current flow is from __________. + to +. גˆ’ to +. + to גˆ’. גˆ’ to גˆ’.

Electron flow is from __________. + to +. גˆ’ to +. + to גˆ’. גˆ’ to גˆ’.

An insulator is a material with __________. many free electrons. few free electrons. many free protons. many free ions.

Opposition to current flow is measured in __________. ohms. amps. volts. watts.

A watt is the power that gives rise to the production of energy at the rate of __________. 1 joule per minute. 1 volt per second. 1 amp per second. 1 joule per second.

The Greek letter phi (ֿ†) is used to __________. indicate ohms. indicate angles or phases. indicate volts. indicate dielectric flux.

A parallel circuit with resistors of 10 ohms, 10 ohms, and 5 ohms has a total resistance of __________. 10 ohms. 5 ohms. 25 ohms. 2.5 ohms.

A circuit contains three parallel resistors. Each resistor has 3 amps flowing through them. What is the total current flowing through the circuit?. 1 A. 3 A. 9 A. 1.5 A.

A capacitor of 100 micro farads has a capacity of __________. 100 picofarads. 10 picofarads. 100,000,000 picofarads. 10,000 picofarads.

Impedance is represented by the symbol __________. X L. R. X C. Z.

In electronics this symbol represents a __________. cathode ray tube. diode. resistor. insulator.

A junction diode is used for __________. rectifying power-line frequencies and lower currents. rectifying power-line frequencies and higher currents. rectifying higher frequencies at lower currents. rectifying higher frequencies at higher currents.

The SCR is a __________. specialized rectifier or diode. special colored rectifier. special controlled rectifier. silicon-controlled relay.

In an FM receiver the AFC is __________. automatic frequency control for stabilizing the IF. automatic frequency control for stabilizing the local oscillator. automatic frequency control for tuning the incoming frequency. automatic frequency control for the radio frequency amplifier.