Exam 4: Analog Processes Control Devices, Sensors and Safety

An example of conditional guard interlock is a switch contact plus a dead -bolt for the guard gate.

The exhaust port of a solenoid valve returns fluid accumulated in the cylinder back to the fluid supply.

Specific gravity is the ratio of the density of the item to the density of air.

A solenoid valve is an electromechanical device that can control the flow of an inert gas.

_________is the first line of defense for protecting people from hazards

Match the advantage or disadvantage to the mechanical interlock. -Easy installation

A three -terminal RTD mitigates the errors caused by lead wire resistance and noise.

Fluids with higher viscosity flow more easily than those with a lower viscosity.

OSHA sets safety standards to save lives, prevent injuries in the work place and protect the health of the American worker.

Match the flow sensor with its classification. -Orifice plate

Match the advantage to its temperature sensor. -Most linear

In a light curtain, an emitter sends an array of synchronous serial infrared light beams to a receiver.

The electrical representation of a presence sensing mat is a normally open switch.

Op amp integrators provide a ramp function as the input to the proportional control valve.

Match the device to its function. -Signal Conditioner

Match the advantage to its temperature sensor. -Fast reaction to temperature change

Besides a temperature sensor, the thermistor is used as a level sensor.

Match the advantage to its temperature sensor. -Very accurate

Match the valve type to the application -Control the liquid through large -diameter pipes

Match the flow sensor with its classification. -Pitot tubes