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.