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7 matching questions

Question #291Radio Equipment, Measurements and Safety

A voltmeter is used:

  1. to measure current
  2. in series with the circuit
  3. in parallel with the circuit ✓ Correct answer
  4. to measure coulombs

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Question #357Radio Equipment, Measurements and Safety

When a fuse is rated 8 A, it means _____________.

  1. it will not work if current is less than 8 A
  2. it has a resistance of 8 W
  3. it will work only if current is 8 A
  4. it will melt if current exceeds 8 A ✓ Correct answer

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Question #366Radio Equipment, Measurements and Safety

An ammeter is used to measure

  1. voltage
  2. current ✓ Correct answer
  3. resistance
  4. All the above

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Question #508Radio Equipment, Measurements and Safety

Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

  1. An oscilloscope uses less power
  2. Complex impedances can be easily measured
  3. Input impedance is much lower
  4. Complex waveforms can be measured ✓ Correct answer

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Question #674Radio Equipment, Measurements and Safety

RF safety is important because

  1. RF energy can cause heating of body tissue ✓ Correct answer
  2. RF is always visible
  3. RF cannot be measured
  4. RF has no biological effect
Explanation: Sufficient RF exposure can heat body tissue; safe practices are required.

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Question #675Radio Equipment, Measurements and Safety

Before working on a transmitter you should

  1. Switch off and discharge high-voltage circuits ✓ Correct answer
  2. Increase power to maximum
  3. Disconnect only the microphone
  4. Hold the antenna
Explanation: Safety first: power down and discharge dangerous voltages.

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Question #676Radio Equipment, Measurements and Safety

A multimeter can typically measure

  1. Voltage, current and resistance ✓ Correct answer
  2. Only frequency
  3. Only SWR
  4. Only RF power
Explanation: A standard multimeter measures V, I and R.

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