[<< wikibooks] FCC Technician Class Exam Study Guide - 2014-2018/Subelement T5 Group B
```Math for electronics: conversion of electrical units; decibels; the metric system

== The Question Pool ==

=== Question 1 ===
How many milliamperes is 1.5 amperes?
A. 15 milliamperes
B. 150 milliamperes
C. 1,500 milliamperes
D. 15,000 milliamperesThe correct answer is C.

=== Question 2 ===
What is another way to specify a radio signal frequency of 1,500,000 hertz?
A. 1500 kHz
B. 1500 MHz
C. 15 GHz
D. 150 kHzThe correct answer is A.

=== Question 3 ===
How many volts are equal to one kilovolt?
A. One one-thousandth of a volt
B. One hundred volts
C. One thousand volts
D. One million voltsThe correct answer is C.

=== Question 4 ===
How many volts are equal to one microvolt?
A. One one-millionth of a volt
B. One million volts
C. One thousand kilovolts
D. One one-thousandth of a voltThe correct answer is A.

=== Question 5 ===
Which of the following is equivalent to 500 milliwatts?
A. 0.02 watts
B. 0.5 watts
C. 5 watts
D. 50 wattsThe correct answer is B.

=== Question 6 ===
If an ammeter calibrated in amperes is used to measure a 3000-milliampere current, what reading would it show?
A. 0.003 amperes
B. 0.3 amperes
C. 3 amperes
D. 3,000,000 amperesThe correct answer is C.

=== Question 7 ===
If a frequency readout calibrated in megahertz shows a reading of 3.525 MHz, what would it show if it were calibrated in kilohertz?
A. 0.003525 kHz
B. 35.25 kHz
C. 3525 kHz
D. 3,525,000 kHzThe correct answer is C.

=== Question 8 ===
How many microfarads are 1,000,000 picofarads?
A. 0.001 microfarads
B. 1 microfarad
C. 1000 microfarads
D. 1,000,000,000 microfaradsThe correct answer is B.

=== Question 9 ===
What is the approximate amount of change, measured in decibels (dB), of a power increase from 5 watts to 10 watts?
A. 2 dB
B. 3 dB
C. 5 dB
D. 10 dBThe correct answer is B.

=== Question 10 ===
What is the approximate amount of change, measured in decibels (dB), of a power decrease from 12 watts to 3 watts?
A. -1 dB
B. -3 dB
C. -6 dB
D. -9 dBThe correct answer is C.

=== Question 11 ===
What is the approximate amount of change, measured in decibels (dB), of a power increase from 20 watts to 200 watts?
A. 10 dB
B. 12 dB
C. 18 dB
D. 28 dBThe correct answer is A.

=== Question 12 ===
Which of the following frequencies is equal to 28,400 kHz?
A. 28.400 MHz
B. 2.800 MHz
C. 284.00 MHz
D. 28.400 kHzThe correct answer is A.

=== Question 13 ===
If a frequency readout shows a reading of 2425 MHz, what frequency is that in GHz?
A. 0.002425 GHZ
B. 24.25 GHz
C. 2.425 GHz
D. 2425 GHzThe correct answer is C.```