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17 Cards in this Set
- Front
- Back
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Which of the following is a main cause of test equipment failure?
1. Improper operating procedure 2. Excessive storage time 3. Improper calibration 4. Excessive usage |
Improper operating procedure
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At what level of maintenance is calibration of test equipment seldom performed?
1. AIMD 2. Intermediate 3. Depot 4. Organizational |
Organizational
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If test set calibration is not
involved, minor repairs to test equipment should be made at which of the following levels of maintenance? 1. Depot maintenance level only 2. Intermediate maintenance level only 3. Only the level of maintenance that performs calibration 4. The level of maintenance at which the test set is used |
The level of maintenance at
which the test set is used |
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When making resistance or continuity tests on electronic equipment
containing a meter, you should take which of the following steps to protect the meter from burning out? 1. Short the meter terminals to ground 2. Disconnect the meter from the circuit 3. Use an extremely low-resistance range on the test equipment 4. Ensure meter current flows in an up-scale direction |
Disconnect the meter from the circuit
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Which of the following meters is designed to measure more than one electrical quantity?
1. An ohmmeter 2. An ammeter 3. A voltmeter 4. A multimeter |
A multimeter
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What is the purpose of a shunt used in an ammeter?
1. To increase the usable current range of the meter 2. To protect the meter movement from high voltages 3. To reduce the internal resistance of the meter movement 4. To increase the total resistance in the circuit |
To increase the usable current range of the meter
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An ohmmeter scale is calibrated to read from 0 to 500 K and the midscale
reading is 30 K. The usable range of the ohmmeter on this scale is from 1. 0 to 300 K 2. 0 to 500 K 3. 3 K to 300 K 4. 30 K to 500 K |
30 K to 500 K
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To adapt the basic voltmeter
mechanism for measuring dc voltages, the basic meter circuit is modified by the addition of 1. multiplying resistors placed in parallel with the meter movement coil 2. multiplying resistors placed in series with the meter movement coil 3. shunts to limit current flow and protect the meter movement 4. shunts to protect the meter movement from high voltages |
multiplying resistors placed in series with the meter movement coil
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When making voltage checks in a given circuit, you should use which of the following types of meters?
1. A 20,000 ohms-per-volt meter 2. A vacuum tube voltmeter 3. A meter having the sensitivity specified on the circuit schematic 4. Any meter that covers the voltage range |
A 20,000 ohms-per-volt meter
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Which of the following test
instruments is used to measure resistances of 10 milliohms or less? 1. Simpson 260 2. Megger 3. USM-21A 4. VTVM |
USM-21A
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What instrument measures resistance of many megohms by applying high voltage to the component under test and measuring its insulation leakage current?
1. A megger 2. A multimeter 3. A volt-ammeter 4. A volt-ohm-milliammeter |
A megger
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A megger is prevented from exceeding its rated output voltage by the action of a/an
1. inherent current leakage through its internal insulation 2. battery discharge limiter 3. voltage regulator 4. slip clutch |
slip clutch
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Meggers are used to test the
insulation resistance of which of the following conductors? 1. Power cables and high-voltage cables only 2. High-voltage cables and transmission lines only 3. Transmission lines and motor and generator windings only 4. Power and high-voltage cables, transmission lines, and motor and generator windings |
Power and high-voltage cables, transmission lines, and motor and generator windings
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Which of the following is the general function of a differential voltmeter?
1. To measure dc voltages from 0 volt to 1,100 volts 2. To measure resistance from 10 megohms to 11,000 megohms 3. To compare an unknown voltage with an internal reference voltage and indicate the difference in values |
To compare an unknown voltage with an internal reference
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Which of the following instruments measures the rotation or vibration
rate of a mechanical device? 1. Gyroscope 2. Lightmeter 3. Tachometer 4. Stroboscope |
Stroboscope
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The frequency measuring device that does not generate an internal signal to measure the frequency of a signal
developed in an external circuit is known as a/an 1. heterodyne meter 2. electronic oscillator 3. wavemeter 4. grid-dip meter |
wavemeter
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A heterodyne frequency meter is used to measure the frequency of a signal
from a device under test. At what point is a zero beat attained? 1. When the amplitude of the meter’s oscillator signal equals the amplitude of the signal being measured 2. When there is no frequency difference between the meter’s oscillator and the signal being measured 3. When the meter’s oscillator is swamped by the signal being measured 4. When an audio signal is heard |
When there is no frequency
difference between the meter’s oscillator and the signal being measured |
