2Ex5X Volume 2 Test Equipment Self Test

Front 1

(200)1 What is the best way to verify an indication given by an item of test equipment?

Back 1

Compare it with a known good item of test equipment, such as a shop standard.

Front 2

(200)2 What internal device does some test equipment use to eliminate moisture?

Back 2

Built in heaters.

Front 3

(200)3 What should be done to test equipment when it is not in use?

Back 3

Store in a dry place, cover with dust covers and or store in its case.

Front 4

(201) Match TE with what it measures: Freq counter, multimeter, ohmmeter,
oscilloscope, ammeter, spectrum analyzer.
Resistance, Waveformm current, frequency, voltage.

Back 4

Freq counter measures frequency, multimeter measures resistance and voltage and current, ohmmeter measures resistance,
oscilloscope measures waveform and frequency and voltage, ammeter measures current, spectrum analyzer measure frequency.

Front 5

(201)2 Why must you unsolder one side of a resistor before making a resistance measurement?

Back 5

To prevent erroneous readings on the ohmmeter.

Front 6

(201)3 List two precautions you should take before making a resistance measurement.

Back 6

1 remove power from the circuit under test
2 disconnect any meters that may be damaged by current from the ohmmeter.

Front 7

(201)4 What test set is used to check transmitter frequency?

Back 7

A freq counter or Spectrum analyzer

Front 8

(202)1 List three troubleshooting aides?

Back 8

Fault indicators, built in test (BIT), Flow charts, checkout and alignment procedures, and specialized test equipment.

Front 9

(202)2 What is the most important step of any troubleshooting effort?

Back 9

think before you act

Front 10

(203)1 List the steps of general troubleshooting procedures used to locate the trouble.

Back 10

1 Recognoze the failure
2 Isolate to a defective area
3 Isolate to a defective unit
4 Isolate to a defective circuit card or module
5 replace or repair the defective part.
6 test the circuits operation and readjust the circuit.

Front 11

(203)2 Which trouble shooting steps can sometimes be eliminated?

Back 11

Isolate to a defective area
Isolate to a defective unit
Isolate to a defective circuit card or module

Front 12

(203)3 Which troubleshooting steps must always be followed?

Back 12

replace or repair th defective part
test the circuits operation and readkust the circuit

Front 13

(204)1 What are the two main categories of equipment inspections?

Back 13

regular visual inspections and functional inspections you do through periodic tests

Front 14

(204)2 When do you do bench checks?

Back 14

only when you have determined that some sort of failure or possibilty of failure exists in the suspect equipment.

Front 15

(204)3 What does caomparison of periodic maintenance inspection data reveal?

Back 15

It reveals slow progressive drifts that may be too small to show up significantly in any one test.

Front 16

(205)1 How can you detirmine if a distant end system failure is creating the problem?

Back 16

Perform a system in-house loopback

Front 17

(205)2 What is the quikest way to return a system to full operation?

Back 17

Unit substitution

Front 18

(205)3 What are diagnostic test used for?

Back 18

to isolate the defective card or module

Front 19

(206)1 What type tests would be performed in component fault isolation?

Back 19

resistance measurements, voltage measurements, and waveform comparison.

Front 20

(206)2 What should be done before making a resistance measurement?

Back 20

make sure all power to equipment under test is off and discharge all folter capacitors.

Front 21

(206)3 What is the advantage of voltage measurements compared to other measurements?

Back 21

circuit operation is not interrupted

Front 22

(206)4 When taking voltage maesurements, what should you do to prevent damaging the voltmeter?

Back 22

Set the voltmeter on the highest range initially so that that any excessive voltages do not overload the meter

Front 23

(206)5 Name two unusual conditions what could cause low voltages to be hazardous?

Back 23

Any two, excessive humidity, wet areas, lack of protective matting or other equipment, and improper grounding.

Front 24

(206)6 What steps should you follow when measureing voltages over 600V?

Back 24

1 Shut off the circuit power, discharge any filter capacitors, and temporarily ground the point.
2 Connect the proper test lead to the high potential point and move away from the voltmeter. do not come in contact with any part of the equipment while the power is on.

Front 25

(206)7 If you suspec t that an incoming waveform does not meet specifications which technique and type of test would you use?

Back 25

Use an oscilloscope and compare waveforms to the specifications listed in the applicable TO

Front 26

(207)1 How many card are you allowed to replace at any one time when using the group removal and replacement method?

Back 26

1/2 of the circuit cards, not to exceed seven

Front 27

(207)2 What is the advantage of using the group removal and replacement technique?

Back 27

It provides for quick restoration of equipment.

Front 28

(207)3 in a circuit with 7 test points list the sequence in which those test points should be tested?

Back 28

TP1 and TP4 then Between TP1 and 4. if no indication on TP4 the test TP 7 and then between TP4 and 7

Front 29

(207)4 What was the method of troubleshooting used in the text to diagnose the equipment malfunction?

Back 29

half-split

Front 30

(207)5 What is an operational check?

Back 30

it tests a unit that previously malfunctioned

Front 31

(207)6 What is a system check?

Back 31

It ensures all circuits are operating and serving their designed purpose