Transducers and Sensors Quiz

What is a transducer?

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What is the difference between active and passive transducers?

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What are the characteristics of sensors?

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What are the types of temperature sensors available?

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What is the principle of strain gauges?

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What is the formula for the change in volume at constant pressure?

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What is the coefficient of volume expansion for air at room temperature?

• 3.66×10–3 K–1

• 1.82×10–4 K–1

• 1.12×10–4 K–1

• 1.80×10–5 K–1

What problems does the fluid in glass thermometer suffer from?

• Good thermal contact is difficult to achieve.

• Difficult to connect to a computer.

• A meniscus forms at the top of the fluid.

• Tapping the thermometer is necessary.

• Volume expansion of glass exhibits hysteresis.

What is the formula for resistivity in a thermoresistive sensor?

• ρ = ρ0(1 + α(T – T0))

• R = R0(1 + α(T – T0))

• ρ = R0(1 + α(T – T0))

• R = ρ0(1 + α(T – T0))

What is the standard device for the International Practical Temperature Scale?

• Thermocouple

• Platinum resistance thermometer

• Fluid in glass thermometer

• Thermistor