Exam 4: Analog Processes Control Devices, Sensors and Safety

__________as a function of temperature is not a classification of a temperature sensor.

Match the flow sensor with its classification. -Vortex

Thermocouples are made from two dissimilar metals.

Which of the following control valves cannot provide for variable positions over a range of 0% to 100%?

The calibration curve is not applicable to non -linear systems.

Pneumatic -assisted valves are used as pilot valves to control the flow to a solenoid valve.

Calibration is the process where a set of known values are applied to a sensor -transmitter combination, and the corresponding output values are measured.

A diaphragm is a flexible membrane that is made of rubber for high pressure measurements and metal for low pressure measurements.

Non -contact interlocks are controlled by a magnetic or electrical field.

The thermal mass flow sensor operates independent of density, pressure and viscosity.

The proximity laser sensor can cover a 180 degree field of view but cannot pattern an irregular shaped area.

The temperature coefficient of a thermistor can be either positive or negative by connecting its control input to ground.

Match the device to its function. -Transmitter

Two unskilled part handlers load forms into a fixture in a robot molding work cell and unload the finished product every twenty minutes. The robot is in the pause mode will they work. The frequency of exposure is _________.

Match the advantage to its temperature sensor. -Most inexpensive

Match the valve type to the application -Control a damper in an air conditioning system

The RTD's change in resistance must be converted to a change in voltage or current so it can be usable.

Density is typically expressed as grams per square centimeter or pounds per square foot.

The magnitude of the output of the LVDT sensor increases regardless of the direction of movement from the null position.

Match the advantage to its temperature sensor. -Very stable