Transducers and Sensors Quiz

What is a transducer?

What is the difference between active and passive transducers?

What are the characteristics of sensors?

What are the types of temperature sensors available?

What is the principle of strain gauges?

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

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