Figure 1E.Thermistor bridge.
IN ANSWERING QUESTION 1-50, REFER
TO FIGURE 1E.
1-50. In the thermistor bridge, what is the
purpose of RT-1 and RT-3?
1. To compensate for power used by
2. To compensate for temperature
changes outside the waveguide
3. To control the amount of rf energy
applied to RT-2
4. To control the temperature of the
1-51. To measure shaft rotation rate on an
engine, you should use, which, if any, of
the following instruments?
1. An ammeter
2. A bolometer
3. A tachometer
4. None of the above
1-52. In the centrifugal tachometer, what
component restricts the action on the
lower collar that is produced by
1. The spring
2. The pointer
3. The upper collar
4. The lower collar
1-53. What is the usual speed range (in feet per
minute) of a chronometric tachometer?
1. 0 to 30
2. 0 to 300
3. 0 to 3,000
4. 0 to 30,000