120-140

What is the major disadvantage of using a standard milliammeter to measure loop current?

• It disrupts the flow of information in the loop

• It is not accurate for measuring DC currents

• It requires a high voltage for operation.

• It is too bulky for field use.

How does a clamp-on milliammeter measure current?

• By directly connecting to the circuit wires

• By using sound waves to measure current flow.

• By detecting the magnetic field around the wire

• By measuring the voltage drop across a resistor

. What is the purpose of a "test" diode in a 4-20 mA loop?

• To protect the circuit from overcurrent

• To convert the DC current to AC current.

• To allow for non-intrusive current measurement

• To regulate the voltage level in the loop.

How does a shunt resistor help measure loop current?

• By creating a voltage drop proportional to the current

• By amplifying the current signal for easier measurement.

• By providing a reference voltage for the voltmeter

• By allowing the current to bypass the meter.

What are devices called that convert energy from one form to another?

• Processors

• Amplifiers

• Transducer

• Encoders

What type of transducer is used to measure the position of an object?

• Position transducer

• Tachometer

• Strain gauge

• Thermocouple

. What are the two main categories of position transducers based on the type of movement they measure?

• Linear and angular

• Flow and level

• Speed and direction

• Pressure and temperature

What information can be obtained from the voltage output of a potentiometric position transducer?

• A.      Speed of the rotating shaft

• Torque applied to the shaft

• Direction of rotation

• Angular position of the shaft

. How are transducers categorized based on their output signal?

• Power consumption

• Large and small

• Digital or Analog

• Material

. What is the main reason a signal conditioner is used with a transducer?

• To change the color of the light

• To amplify the sound

• To reduce the weight

• To convert the electrical signal