Electronic principles: capacitance; inductance; current flow in circuits; alternating current; definition of RF; DC power calculations; impedance

Technician Class Exam Question Pool

effective 7/01/2014 thru 6/30/2018

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T5C-2014: Electronic principles: capacitance; inductance; current flow in circuits; alternating current; definition of RF; DC power calculations; impedance

T5C01-2014:
What is the ability to store energy in an electric field called?

Capacitance

Inductance

Resistance

Tolerance

T5C02-2014:
What is the basic unit of capacitance?

The farad

The ohm

The volt

The henry

T5C03-2014:
What is the ability to store energy in a magnetic field called?

Inductance

Admittance

Capacitance

Resistance

T5C04-2014:
What is the basic unit of inductance?

The henry

The coulomb

The farad

The ohm

T5C05-2014:
What is the unit of frequency?

Hertz

Henry

Farad

Tesla

T5C06-2014:
What does the abbreviation “RF” refer to?

Radio frequency signals of all types

The resonant frequency of a tuned circuit

The real frequency transmitted as opposed to the apparent frequency

Reflective force in antenna transmission lines

T5C07-2014:
What is a usual name for electromagnetic waves that travel through space?

Radio waves

Gravity waves

Sound waves

Pressure waves

T5C08-2014:
What is the formula used to calculate electrical power in a DC circuit?

Power (P) equals voltage (E) multiplied by current (I)

Power (P) equals voltage (E) divided by current (I)

Power (P) equals voltage (E) minus current (I)

Power (P) equals voltage (E) plus current (I)

T5C09-2014:
How much power is being used in a circuit when the applied voltage is 13.8 volts DC and the current is 10 amperes?

138 watts

0.7 watts

23.8 watts

3.8 watts

T5C10-2014:
How much power is being used in a circuit when the applied voltage is 12 volts DC and the current is 2.5 amperes?

30 watts

4.8 watts

14.5 watts

0.208 watts

T5C11-2014:
How many amperes are flowing in a circuit when the applied voltage is 12 volts DC and the load is 120 watts?

10 amperes

0.1 amperes

12 amperes

132 amperes

T5C12-2014:
What is meant by the term impedance?

It is a measure of the opposition to AC current flow in a circuit

It is the inverse of resistance

It is a measure of the Q or Quality Factor of a component

It is a measure of the power handling capability of a component