T7D-2010: Basic repair and testing; soldering, use of a voltmeter, ammeter, and ohmmeter
T7D01:
Which instrument would you use to measure electric potential or electromotive force?
A voltmeter
An ammeter
A wavemeter
An ohmmeter
T7D02:
What is the correct way to connect a voltmeter to a circuit?
In parallel with the circuit
In series with the circuit
In quadrature with the circuit
In phase with the circuit
T7D03:
How is an ammeter usually connected to a circuit?
In series with the circuit
In parallel with the circuit
In quadrature with the circuit
In phase with the circuit
T7D04:
Which instrument is used to measure electric current?
An ammeter
An ohmmeter
A wavemeter
A voltmeter
T7D05:
What instrument is used to measure resistance?
An ohmmeter
An oscilloscope
A spectrum analyzer
A noise bridge
T7D06:
Which of the following might damage a multimeter?
Attempting to measure voltage when using the resistance setting
Measuring a voltage too small for the chosen scale
Leaving the meter in the milliamps position overnight
Not allowing it to warm up properly
T7D07:
Which of the following measurements are commonly made using a multimeter?
Voltage and resistance
SWR and RF power
Signal strength and noise
Impedance and reactance
T7D08:
Which of the following types of solder is best for radio and electronic use?
Rosin-core solder
Acid-core solder
Silver solder
Aluminum solder
T7D09:
What is the characteristic appearance of a "cold" solder joint?
A grainy or dull surface
Dark black spots
A bright or shiny surface
A greenish tint
T7D10:
What is probably happening when an ohmmeter, connected across a circuit, initially indicates a low resistance and then shows increasing resistance with time?
The circuit contains a large capacitor
The ohmmeter is defective
The circuit contains a large inductor
The circuit is a relaxation oscillator
T7D11:
Which of the following precautions should be taken when measuring circuit resistance with an ohmmeter?
Ensure that the circuit is not powered
Ensure that the applied voltages are correct
Ensure that the circuit is grounded
Ensure that the circuit is operating at the correct frequency
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