Which term describes the rate at which electrical energy is used?
B.
Electrical power is measured in which of the following units?
B.
What is the formula used to calculate electrical power in a DC circuit?
D.
How much power is being used in a circuit when the applied voltage is 13.8 volts DC and the current is 10 amperes?
D. 3.8 watts
A.
How much power is being used in a circuit when the applied voltage is 12 volts DC and the current is 2.5 amperes?
D.
How many amperes are flowing in a circuit when the applied voltage is 12 volts DC and the load is 120 watts?
D. 132 amperes
B.
What formula is used to calculate voltage in a circuit?
D.
What is the voltage across a 2-ohm resistor if a current of 0.5 amperes flows through it?
A. 1 volt
B. 0.25 volts
C. 2.5 volts
D. 1.5 volts
A
What is the voltage across a 10-ohm resistor if a current of 1 ampere flows through it?
B.
What is the voltage across a 10-ohm resistor if a current of 2 amperes flows through it?
A.
What formula is used to calculate current in a circuit?
C.
What is the current flowing through a 24-ohm resistor connected across 240 volts?
A.
What is the current flowing through a 100-ohm resistor connected across 200 volts?
D.
What is the current flow in a circuit with an applied voltage of 120 volts and a resistance of 80 ohms?
B.
What formula is used to calculate resistance in a circuit?
B.
What is the resistance of a circuit in which a current of 3 amperes flows through a resistor connected to 90 volts?
D.
What is the resistance in a circuit for which the applied voltage is 12 volts and the current flow is 1.5 amperes?
A.
What is the resistance of a circuit that draws 4 amperes from a 12-volt source?
D.
What is the name for standardized representations of components in an electrical wiring diagram?
D. Component callouts
B.
What do the symbols on an electrical circuit schematic diagram represent?
B.
Which of the following is accurately represented in electrical circuit schematic diagrams?
B.
A. Connector
B. Meter
C. Variable capacitor
D. Variable inductor
D
A. Antenna
B. Transmitter
C. Dummy load
D. Ground
A
Which of the following is used together with an inductor to make a tuned circuit?
A.
B.
B.
What is the function
D.
B.
C.
What type of switch ?
D.
What is the component
C.
What is component ?
A.
What is component ?
A.
What is component ?
B.
Which of the following can be used to display signal strength on a numeric scale?
B.
What best describes a relay?
A. A switch controlled by an electromagnet
B. A current controlled amplifier
C. An optical sensor
D. A pass transistor
A
What is the approximate amount of change, measured in decibels (dB), of a power increase from 5 watts to 10 watts?
C.
What is the approximate amount of change, measured in decibels (dB), of a power decrease from 12 watts to 3 watts?
D.
What is the approximate amount of change, measured in decibels (dB), of a power increase from 20 watts to 200 watts?
D.
What type of circuit controls the amount of voltage from a power supply?
D.
What component is commonly used to change 120V AC house current to a lower AC voltage for other uses?
C.
What is the name of a device that combines several semiconductors and other components into one package?
A.
What does the abbreviation "LED" stand for?
D.
Which of the following is commonly used as a visual indicator?
B.
What is another way to specify a radio signal frequency of 1,500,000 hertz?
B.
How many volts are equal to one kilovolt?
A.
If an ammeter calibrated in amperes is used to measure a 3000-milliampere current, what reading would it show?
C.
Which of the following is equivalent to 500 milliwatts?
D.
How many milliamperes is 1.5 amperes?
A. 15 milliamperes
B. 150 milliamperes
C. 1,500 milliamperes
D. 15,000 milliamperes
C
How many microfarads are 1,000,000 picofarads?
C.
How many volts are equal to one microvolt?
C.
Which of the following types of solder is best for radio and electronic use?
D. Aluminum solder
A.
What is the characteristic appearance of a "cold" solder joint?
A.
Which of the following measurements are commonly made using a multimeter?
A. SWR and RF power
B. Signal strength and noise
C. Impedance and reactance
D. Voltage and resistance
D
Which of the following precautions should be taken when measuring circuit resistance with an ohmmeter?
D.
Which of the following might damage a multimeter?
D.
What is probably happening when an ohmmeter, connected across a circuit, initially indicates a low resistance and then shows increasing resistance with time?
