The SCR is ideal for ac applications. True False

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Home ‣ Electronics ‣ Measurement, Conversion and Control Comments

Question
The SCR is ideal for ac applications.
Options
A. True
B. False

Correct Answer

False

Measurement, Conversion and Control problems

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1. A resistance temperature detector produces a voltage for a given change in temperature.
Options
A. True
B. False

Discuss

Correct Answer: False

2. The triac provides better dc power control than the SCR.
Options
A. True
B. False

Discuss

Correct Answer: False

3. Displacement, velocity, and acceleration can all be measured by using specific motion transducers.
Options
A. True
B. False

Discuss

Correct Answer: True

4. A strain gauge uses the principle of capacitance for its operation.
Options
A. True
B. False

Discuss

Correct Answer: False

5. Noncontacting displacement transducers include optical and capacitive transducers.
Options
A. True
B. False

Discuss

Correct Answer: True

6. The ________ are two types of acceleration transducers.
Options
A. LVDT and the piezoelectric
B. magnetic and the piezoelectric
C. RTD and the magnetic
D. LVDT and the RTD

Discuss

Correct Answer: LVDT and the piezoelectric

7. The three types of relative pressure measurement are ________.
Options
A. exact, reflective, and referenced
B. absolute, exact, and differential
C. absolute, gauge, and reflective
D. absolute, gauge, and differential

Discuss

Correct Answer: absolute, gauge, and differential

8. The voltage produced by a thermocouple is called the _________.
Options
A. hot junction voltage
B. cold junction voltage
C. Seebeck voltage
D. Hooke voltage

Discuss

Correct Answer: Seebeck voltage

9. A sample-and-hold circuit consists of _________.
Options
A. an op-amp, an analog switch, and an inductor
B. an op-amp, an analog switch, and a capacitor
C. two op-amps, an analog switch, and a variable resistor
D. two op-amps, an analog switch, and a capacitor

Discuss

Correct Answer: two op-amps, an analog switch, and a capacitor

10. All triacs operate in __________.
Options
A. quadrant 1 and quadrant 2
B. quadrant 1 and quadrant 3
C. quadrant 2 and quadrant 4
D. quadrant 3 and quadrant 4

Discuss

Correct Answer: quadrant 1 and quadrant 3

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The SCR is ideal for ac applications.

Measurement, Conversion and Control problems

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