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Electrical Tests and Methods

Quiz Questions:

   
1. Voltages are usually measured by placing the measuring device in parallel with the component or circuit (load) to be measured. The measuring device should have an infinite internal resistance input impedance) so that it will absorb no energy from the circuit under test and, therefore, measure the true voltage.
       
    True
    False
       
2. Figure 1-5 represents
       
    Ac-dc differential voltmeter,
    Digital multimeter
       
3. A major advantage of using an _____________ for ac voltage measurements is that the waveform can be observed; consequently, errors in measuring complex peak voltages are minimized. It may be used as a high-impedance ac voltmeter.
       
   

Oscilloscopes

   

Multimeters

   

Voltmeters

       
4. In page 28, ______________ produce the large voltages that are required to measure resistances as high as 10,000megohms — only high resistance values can be measured.
       
   

Meggers

   

Bridges

       
5. The Hay Bridge (view B of fig. 1-14) differs from the Maxwell Bridge (view C) in figure 1-14. The difference is – for the Hay Bridge resistance associated with the capacitance is a series instead of a shunt resistance.
       
   

True

   

False

       
6. In pages 34 & 35 the Maxwell & Hay Bridges are used to calculate:
       
   

Inductances

   

Resistances

       
7. The factors affecting the life expectancy of the________ are listed in page 43.
       
   

Electron Tube

   

Klystron Tube

       
8. Electrostatic Discharge Sensitive (ESDS) devices can be grouped by their sensitivity to ESD as ____________
       
   

Very sensitive devices,

   

Moderate sensitive devices,

   

Sensitive devices

   

All the above

       
9. 9. RF diode test and switching diode test are the types of diode testers.
       
   

True

   

False

       
10. Figures 2-8 to 2-11 represent the different characteristics of different diodes.
       
   

True

   

False

       
11. Figure 2-23 represents:
       
   

Types of ICs

   

Types of diodes

       
12. The Wheatstone, Schering, Kelvin, Hay, Resistance-Ratio and Maxwell bridges are the basic bridge circuits as shown in page 90.
       
   

True

   

False

       
13. The resistance-ratio bridge, shown in figure 3-1, may be used to measure ___________________so long as the electronic part to be measured is compared with a similar standard.
       
   

Capacitance, inductance, or resistance

   

Capacitance and inductance

       
14. The ________________is used to measure power taken from ac or dc power sources. It uses the reaction between the magnetic fields of two current-carrying coils (or sets of coils), one fixed and the other movable as shown in figure 3-10.
       
   

Electrodynamic wattmeter

   

Converter

       
15. The absorption, the reaction, and the transmission types are three basic kinds of wave meters.
       
   

True

   

False

       
16. The Hewlett-Packard Model 415E SWR meter, shown in figure 4-3, is a commonly used SWR meter.
       
   

True

   

Flase

       
17. What does the formula for impedance represent on page 137?
       
   

Impedance for a coaxial line

   

Impedance of a Conductor

       
18. In page 139 the attenuation for a coaxial line is described in terms of decibels per foot.
       
   

True

   

Flase

       
19. Wave-Envelope and Trapezoidal Pattern are the two types of _____________
       
   

Modulation Patterns

   

Waveform Patterns

       
20. Rate of frequency shift is inversely proportional to the frequency of the modulating signal.
       
   

True

   

False

       
   
 
 

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