Lesson 2
PRACTICE EXERCISE
1.
Which is not a basic part of a thermal transfer standard?
a.
Thermocouple
b.
c.
Galvanometer
d.
DC reference supply
2.
When initially powering up the 540B, the thermocouple bead should be allowed to
stabilize for
?
a.
45
minutes
b.
30
minutes
c.
15
minutes
d.
10
minutes
3.
Which battery should be replaced when the reference battery check indicates in
the green area of the percent input meter?
a.
BT107
b.
BT106
c.
BT105
d.
BT102
4.
What is the input voltage range of the Model 540B?
a.
0.5
to
100 volts
b.
0.5
to
1000 volts
c.
1.0
to
100 volts
d.
5.0
to
1000 volts
5.
Refer to Figure 2-9. When a DC current is applied to the magnetic modulator,
what should be the input to the meter circuit?
a.
A
negative DC current
b.
A
proportional AC current
c.
A
5 KHz signal
d.
A
5 KHz square wave
6.
What should the Model 540B percent input meter indicate with a 15-volt signal
applied on the 20 volt range?
a.
15
volts
b.
15
percent
c.
25
percent
d.
75
percent
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