Measurement, Conversion and Control Questions

• Power control devices — DC vs. AC suitability: “The triac provides better DC power control than the SCR.” Assess this statement considering device physics and typical applications.
• Temperature transducers — RTD output variable: An RTD (resistance temperature detector) produces a change in which electrical quantity for a given change in temperature? The claim says it “produces a voltage.” Decide whether the claim is valid.
• Device suitability — SCR for AC applications: Is the blanket statement “The SCR is ideal for AC applications” accurate? Consider typical AC control scenarios versus device characteristics.
• Acceleration transducers — common types: Which pair correctly lists two common types of acceleration transducers used in measurement and control?
• Pressure measurement — categories of relative measurement: Select the correct trio that names the common categories: absolute pressure, gauge pressure, and differential pressure.
• Thermocouples — name of the generated voltage: The voltage produced by a thermocouple due to a temperature difference across its junctions is called the _________.
• Sample-and-hold (S/H) — basic building blocks: A practical sample-and-hold circuit typically consists of which combination of elements?
• Triac conduction — operating quadrants under AC excitation: “All triacs operate in __________.” Choose the pair of I–V plane quadrants that correspond to normal current/voltage conduction regions of a triac device (not the gate-trigger quadrants).
• Temperature sensors — a thermistor's resistance–temperature characteristic (R vs T) is best described as which type of relationship for practical engineering use (note: most thermistors are NTC or PTC with strongly curved R–T behavior rather than straight-line)?
• Power electronics — a triac differs from an SCR (silicon-controlled rectifier) primarily because a triac ________.
• Remote-controlled power switching — which device below can be rapidly switched ON and OFF by a separate low-power control circuit to drive an AC load?
• Digital basics — the number of distinct values representable by an n-bit binary word is given by which expression?
• Displacement sensing — the device made from a transformer with a movable ferromagnetic core, one primary, and two secondaries connected in opposition is called a(n) ______.
• Sensor physics — RTDs, strain gauges, and many pressure transducers operate on which fundamental effect when used in measurement bridges?
• A/D conversion survey — the two most common analog-to-digital converter architectures emphasized in foundational electronics courses are the ______.