What is a transducer?

• A controller for electrical systems

• A device that converts one form of energy into another

• A type of sensor that detects motion

• A machine that amplifies sound

Answer explanation

A transducer is specifically defined as a device that converts one form of energy into another, making this the correct choice. Other options describe different types of devices but do not capture the essence of a transducer.

Which of the following is an example of a transducer?

• A microphone

• A capacitor

• A battery

• A resistor

Answer explanation

A microphone is a transducer because it converts sound waves (acoustic energy) into electrical signals. In contrast, a capacitor, battery, and resistor do not perform this function.

What does a thermocouple do?

• Converts sound into electrical impulses

• Measures temperature and produces output voltages

• Transforms mechanical energy into electrical energy

• Generates light from electrical energy

Answer explanation

A thermocouple measures temperature by generating a voltage output that corresponds to the temperature difference between its two junctions, making 'Measures temperature and produces output voltages' the correct choice.

What is the process of changing energy from one form to another called?

• Transference

• Transduction

• Transmission

• Transformation

Answer explanation

The process of changing energy from one form to another is called transduction. This term specifically refers to the conversion of energy types, such as light to electrical energy in sensory systems.

Which property of a transducer measures the smallest unit of measurement?

• Resolution

• Dynamic Range

• Sensitivity

• Stability

Answer explanation

Resolution is the property of a transducer that indicates the smallest change it can detect in the input signal. It defines the precision of measurement, making it the correct choice for measuring the smallest unit.

What does the Signal to Noise Ratio (SNR) indicate?

• The total energy output of a system

• The ratio between the wanted signal and unwanted noise

• The efficiency of a transducer

• The maximum signal a system can handle

Answer explanation

The Signal to Noise Ratio (SNR) measures the strength of the desired signal compared to the background noise. A higher SNR indicates a clearer signal, making 'the ratio between the wanted signal and unwanted noise' the correct choice.

Which type of actuator creates circular motion?

• Rotary actuator

• Linear actuator

• Pneumatic actuator

• Hydraulic actuator

Answer explanation

A rotary actuator is specifically designed to create circular motion, making it the correct choice. In contrast, linear actuators produce straight-line movement, while pneumatic and hydraulic actuators can be either linear or rotary depending on their design.

What type of actuator uses pressurized gases for movement?

• Electric actuator

• Thermal actuator

• Hydraulic actuator

• Pneumatic actuator

Answer explanation

A pneumatic actuator uses pressurized gases, typically air, to create movement. This distinguishes it from electric, thermal, and hydraulic actuators, which rely on electricity, heat, and pressurized liquids, respectively.

Which of the following is NOT a type of transducer?

• Electromagnetic transducer

• Electromechanical transducer

• Thermal sensor

• Electrochemical transducer

Answer explanation

A thermal sensor measures temperature but does not convert energy from one form to another, unlike the other options which are all types of transducers that convert energy types.

What is the main function of a sensor?

• To convert energy into motion

• To amplify electrical signals

• To store energy for later use

• To receive and respond to a signal

Answer explanation

The main function of a sensor is to receive and respond to a signal, allowing it to detect changes in the environment and provide data for processing.