FCC Technician Class Exam Study Guide - 2014-2018/Subelement T5 Group A
Electrical principles, units, and terms: current and voltage; conductors and insulators; alternating and direct current
The Question Pool
[edit | edit source]Question 1
[edit | edit source]- Electrical current is measured in which of the following units?
- A. Volts
- B. Watts
- C. Ohms
- D. Amperes
The correct answer is D.
Question 2
[edit | edit source]- Electrical power is measured in which of the following units?
- A. Volts
- B. Watts
- C. Ohms
- D. Amperes
The correct answer is B.
Question 3
[edit | edit source]- What is the name for the flow of electrons in an electric circuit?
- A. Voltage
- B. Resistance
- C. Capacitance
- D. Current
The correct answer is D.
Question 4
[edit | edit source]- What is the name for a current that flows only in one direction?
- A. Alternating current
- B. Direct current
- C. Normal current
- D. Smooth current
The correct answer is B.
Question 5
[edit | edit source]- What is the electrical term for the electromotive force (EMF) that causes electron flow?
- A. Voltage
- B. Ampere-hours
- C. Capacitance
- D. Inductance
The correct answer is A.
Question 6
[edit | edit source]- How much voltage does a mobile transceiver usually require?
- A. About 12 volts
- B. About 30 volts
- C. About 120 volts
- D. About 240 volts
The correct answer is A.
Question 7
[edit | edit source]- Which of the following is a good electrical conductor?
- A. Glass
- B. Wood
- C. Copper
- D. Rubber
The correct answer is C.
Question 8
[edit | edit source]- Which of the following is a good electrical insulator?
- A. Copper
- B. Glass
- C. Aluminum
- D. Mercury
The correct answer is B.
Question 9
[edit | edit source]- What is the name for a current that reverses direction on a regular basis?
- A. Alternating current
- B. Direct current
- C. Circular current
- D. Vertical current
The correct answer is A.
Question 10
[edit | edit source]- Which term describes the rate at which electrical energy is used?
- A. Resistance
- B. Current
- C. Power
- D. Voltage
The correct answer is C.
Question 11
[edit | edit source]- What is the basic unit of electromotive force?
- A. The volt
- B. The watt
- C. The ampere
- D. The ohm
The correct answer is A.
Question 12
[edit | edit source]- What term describes the number of times per second that an alternating current reverses direction?
- A. Pulse rate
- B. Speed
- C. Wavelength
- D. Frequency
The correct answer is D.