NEETS 16 CH 1,6 Flashcards
What system is currently used by all branches of the military to identify test equipment?
Joint Electronics Type Designation System (JETDS
Name the two classes of test equipment.
General-purpose electronic test equipment (GPETE) and special-purpose electronic test equipment (SPETE).
What test equipment is designed to generate, modify, or measure a range of parameters of electronic functions of a specific nature required to test a single system or equipment?
Special-purpose electronic test equipment
Name the two basic elements of the SCLSIS program.
Validation and updating
What calibration label is used when actual measurement values must be known to use the test equipment?
. CALIBRATED—REFER TO REPORT
An instrument that must be calibrated in place requires what type of calibration label?
SPECIAL CALIBRATION label
Responsibility for repair and maintenance of test equipment generally rests with what group of personnel?
Maintenance personnel
What Navy office oversees the MEASURE program?
The Chief of Naval Operations
What are the two main categories of maintenance?
. Preventive and corrective maintenance.
What type of maintenance involves isolating equipment troubles and replacing defective parts?
Corrective maintenance.
Which quantity (voltage or current) determines the intensity of an electrical shock?
. Current.
What tool is used to de-energize capacitors in a circuit that has been disconnected from its power source?
Shorting probe
On what range should you set the voltmeter prior to taking a voltage measurement?
Highest.
When taking a voltage measurement, which lead of the voltmeter should you connect to the circuit first?
Ground
Is an ammeter connected in series or in parallel with the circuit under test?
In series.
What must be done to a circuit before you can use an ohmmeter for testing?
It must be de-energized
What is the term used to refer to the losses which can be traced to the dielectric of a capacitor?
Power losses.
What effect does an increase in capacitance have on a capacitor’s opposition to current flow?
Opposition to current flow decreases
When a bridge is used to measure resistance, what is the value of Rx if R1 equals 80 ohms, R2 equals 120 ohms, and R3 equals 280 ohms?
420 ohms.
When an unknown capacitance is tested with a bridge, what is the value of Cx if R1 equals 70 ohms, R2 equals 150 ohms, and Cs equals 550 microfarads?
256 microfarads
What element controls the number of electrons striking the screen?
Control grid.
What element is controlled to focus the beam?
The first anode
Why are the electrostatic fields between the electron gun elements called lenses?
Because they bend electron streams in much the same manner that optical lenses bend light rays.
What is the function of the second anode?
accelerates the electrons emerging from the first anode.
What effect do longer deflection plates have on the electron beam?
A greater deflection angle.
What effect does closer spacing of plates have on the electron beam?
A greater deflection angle
Is the deflection angle greater with higher or lower potential on the plates?
. Higher potential
Is the deflection angle greater when the beam is moving faster or slower?
Slower beam.
Q-9. Waveforms are described in terms of what two functions?
A-9. Amplitude and time.
Q-10. The vertical-deflection plates are used to reproduce what function?
Amplitude
Q-11. The horizontal-deflection plates are used to produce what function?
A-11. Time and/or frequency relationships.
Why are the ends of the deflection plates bent outward?
A-12. To permit wide-angle deflection of the beam.
Q-13. What term is used to describe the reciprocal of deflection sensitivity of a scope?
A-13. Deflection factor.
Q-14. List the circuits that all oscilloscopes have in common.
A-14. A CRT, a group of control circuits, power supply, sweep circuitry, and deflection circuitry.
When you select the time base to display a signal, should the time base be the same, higher, or lower than the input signal?
A-15. Lower.
Q-16. Oscilloscopes are used to measure what quantities?
A-16. Amplitude, phase, time, and frequency.
Scopes that produce two channels on a single CRT with a single beam are referred to as what types of scopes?
A-17. Dual-trace oscilloscopes.
Q-18. The first converter is also known by what other name?
A-18. Front end.
