Sensors and Actuators Quiz

What are the two stages in a measuring device?

• Measurement stage and Analysis stage
• Input stage and Output stage
• Sensing stage and Displaying stage
• Calibration stage and Testing stage

What are some applications of sensors?

What is the role of sensors in control systems?

• Sensors provide real-time data to control systems, enabling monitoring and adjustments.
• Sensors only detect temperature changes.
• Sensors are used solely for data storage.
• Sensors replace the need for control systems.

What are the classifications of sensors based on technology?

• Analog sensors, Digital sensors, Smart sensors
• Thermal sensors
• Optical sensors
• Mechanical sensors

What is relative permeability defined as?

• Relative permeability is the speed at which a fluid flows through a solid material.
• Relative permeability is the ratio of the permeability of a porous medium to the permeability of a reference fluid.
• Relative permeability is the total permeability of a fluid in a vacuum.
• Relative permeability is the measure of fluid density in a porous medium.

What are the advantages of linear variable differential transformers?

• High susceptibility to temperature changes
• Limited range of motion
• Low cost and easy to manufacture
• Advantages of LVDTs include high accuracy, excellent linearity, robustness, no contact wear, high sensitivity, and immunity to electromagnetic interference.

What is the gauge factor for metallic foil strain gauges?

• 1 to 3
• 0 to 1
• 5 to 10
• 2 to 5, commonly around 2.0

What is the principle of pressure sensors?

• Balance the pressure with an opposing force

• Measure the resulting deflection

• Measure the resulting strain or stress

• All of the above

What does a thermocouple measure?

• Voltage at the junction of two conductors

• Resistance change with temperature

• Displacement due to thermal expansion

• Pressure changes

What is the function of a digital resolver?

• To measure angular position

• To provide pulse signals

• To sense mutual induction

• To measure temperature