Compressor, FRL, and lines

When should an air filter be drained?

• When any amount of fluid is trapped in the filter element.

• When the filter element is clogged with dirt.

• After the fluid in the bowl reaches the top of the baffle.

• Before the fluid level in the bowl reaches the bottom of the baffle.

What happens if the air temperature in a pneumatic system drops below the dew point?

• Air friction increases.

• Condensation forms.

• Pipes will freeze.

• Decrease in compressor performance.

What device is most often used to automatically turn off a reciprocating air compressor when the system demand for air stops?

• Pressure switch

• Flow switch

• PLC output

• Pushbutton switch

How are sintered bronze air filter elements serviced when they become dirty?

• Clean with Dacron.

• Clean by backflushing.

• Replace because they cannot be cleaned.

• Tap against a hard surface.

For what purpose is a pneumatic regulator used?

• To remove dirt from the air.

• To provide a constant pressure to the circuit.

• To connect three branch circuits to a supply.

• To shut off the compressor.

What does a dashed line in a pneumatic schematic represent?

• Main line

• Exhaust line

• Enclosure

• Pilot line

What method of lubricating pneumatic components mixes the lubricant with the compressed air?

• Oil injection

• Forced draft

• Aerosol

• Oil cup

What method is most commonly used to determine the flow rate of lubricant being dispensed by an air mist lubricator?

• External flow control setting

• Lubricant level in bowl

• Pressure gauge reading

• Drip rate shown in sight dome

In a compressed air system, what carries lubricant from an air lubricator to the points of use?

• Water droplets

• Dust particles

• Air flow

• Oil lines

When should lubricant be added to a pneumatic lubricator?

• Sight feed dome of lubricator is under 50% level.

• Lubricator drip rate slows.

• Oil level in lubricator bowl is below end of suction tube.

• Oil level in lubricator bowl is below minimum level line.