Lesson 1
PRACTICE EXERCISE
1.
What are two of the three principal measuring instruments used to perform
maintenance?
a.
Voltmeter and frequency counter
b.
c.
Voltmeter and oscilloscope
d.
2.
To measure large amounts of current you must put what in the circuit?
a.
Impedance matching device
b.
Shunt device
c.
Temperature coefficient
d.
Capacitance device
3.
What must you observe when connecting a meter in circuit?
a.
The current
b.
Voltage
c.
Impedance
d.
Polarity
4.
To determine full-scale deflection for a voltmeter, you use what formula?
a.
b.
E = 1 xR = 0.001 x 50
c.
d.
I=R+E
5.
What must you do to extend the range of a voltmeter?
a.
Add
a shunt device
b.
Add
a parallel resistor
c.
Add
an impedance device
d.
Add
a series resistor
6.
What are the two sensitivity settings of a PSM-6 voltmeter?
a.
500 ohms per volt and 20,000 ohms per volt
b.
1000 ohms per volt and 20,000 ohms per volt
c.
1000 ohms per volt and 10,000 ohm per volt
d.
500 ohms per volt and 10,000 ohms per volt
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