# FCC Technician Class Exam Study Guide - 2014-2018/Subelement T5 Group B

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Math for electronics: conversion of electrical units; decibels; the metric system

## Contents

## The Question Pool[edit]

### Question 1[edit]

- How many milliamperes is 1.5 amperes?
- A. 15 milliamperes
- B. 150 milliamperes
- C. 1,500 milliamperes
- D. 15,000 milliamperes

**The correct answer is C.**

### Question 2[edit]

- 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 kHz

**The correct answer is A.**

### Question 3[edit]

- 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 volts

**The correct answer is C.**

### Question 4[edit]

- 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 volt

**The correct answer is A.**

### Question 5[edit]

- Which of the following is equivalent to 500 milliwatts?
- A. 0.02 watts
- B. 0.5 watts
- C. 5 watts
- D. 50 watts

**The correct answer is B.**

### Question 6[edit]

- 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 amperes

**The correct answer is C.**

### Question 7[edit]

- 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 kHz

**The correct answer is C.**

### Question 8[edit]

- How many microfarads are 1,000,000 picofarads?
- A. 0.001 microfarads
- B. 1 microfarad
- C. 1000 microfarads
- D. 1,000,000,000 microfarads

**The correct answer is B.**

### Question 9[edit]

- 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 dB

**The correct answer is B.**

### Question 10[edit]

- 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 dB

**The correct answer is C.**

### Question 11[edit]

- 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 dB

**The correct answer is A.**

### Question 12[edit]

- 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 kHz

**The correct answer is A.**

### Question 13[edit]

- 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 GHz

**The correct answer is C.**