Measurement, Conversion and Control problems
- 1. The triac provides better dc power control than the SCR.
Options- A. True
- B. False Discuss
Correct Answer: False
- 2. A resistance temperature detector produces a voltage for a given change in temperature.
Options- A. True
- B. False Discuss
Correct Answer: False
- 3. The SCR is ideal for ac applications.
Options- A. True
- B. False Discuss
Correct Answer: False
- 4. 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
- 5. 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
- 6. 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
- 7. 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
- 8. 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
- 9. A thermistor's temperature characteristic is essentially _________.
Options- A. linear
- B. logarithmic
- C. nonlinear
- D. geometric Discuss
Correct Answer: logarithmic
- 10. A triac is different from an SCR because ________.
Options- A. it can handle large current flows
- B. it can handle large voltages
- C. the gate signal can turn off the current flow
- D. it allows current flow in both directions Discuss
Correct Answer: it allows current flow in both directions
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