Study Technician T7D

T7D

PRACTICAL CIRCUITS

Using basic test instruments: voltmeter, ammeter, and ohmmeter; Soldering

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T7D01

Which instrument would you use to measure electric potential?

  1. A An ammeter
  2. B A voltmeter
  3. C A potentiometer
  4. D An ohmmeter
T7D02

How is a voltmeter connected to a component to measure applied voltage?

  1. A In series
  2. B In parallel
  3. C In quadrature
  4. D In phase
T7D03

When configured to measure current, how is a multimeter connected to a component?

  1. A In series
  2. B In parallel
  3. C In quadrature
  4. D In phase
T7D04

Which instrument is used to measure electric current?

  1. A An ohmmeter
  2. B An electrometer
  3. C A voltmeter
  4. D An ammeter
T7D05

How does an ohmmeter measure the resistance of a circuit or component?

  1. A By applying a small current and measuring the resulting voltage
  2. B By placing a variable resistor in parallel with the circuit
  3. C By placing a variable resistor in series with the circuit
  4. D By applying a variable voltage and measuring the resulting current change
T7D06

Which of the following can damage a multimeter?

  1. A Attempting to measure resistance using the voltage setting
  2. B Failing to connect one of the probes to ground
  3. C Attempting to measure voltage when using the resistance setting
  4. D Not allowing it to warm up properly
T7D07

Which of the following measurements are made using a multimeter?

  1. A Signal strength and noise
  2. B Impedance and reactance
  3. C Voltage and resistance
  4. D All these choices are correct
T7D08

Which of the following types of solder should not be used for radio and electronic applications?

  1. A Acid-core solder
  2. B Lead-tin solder
  3. C Rosin-core solder
  4. D Tin-copper solder
T7D09

What is the characteristic appearance of a cold tin-lead solder joint?

  1. A Dark black spots
  2. B A bright or shiny surface
  3. C A rough or lumpy surface
  4. D A greenish tinge
T7D10

What reading indicates that an ohmmeter is connected across a large, discharged capacitor?

  1. A Increasing resistance with time
  2. B Decreasing resistance with time
  3. C Steady full-scale reading
  4. D Alternating between open and short circuit
T7D11

Which of the following precautions should be taken when measuring in-circuit resistance with an ohmmeter?

  1. A Ensure that the applied voltages are correct
  2. B Ensure that the circuit is not powered
  3. C Ensure that the circuit is grounded
  4. D Ensure that the circuit is operating at the correct frequency
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