Int Pneumatics LAP 2- Air Logic

For shifting, externally air piloted pneumatic DCVs use:

• Remote air pressure

• Solenoids

• Levers

• Manual overrides

In an air logic sequence circuit, the ________________ valves acts as a limit switch.

• Cam

• Shuttle

• Unloading

• Counterbalance

Shuttle valves are used in air logic circuits to _________________

• Provide OR logic

• Latch in spring offset externally piloted DCV’s

• Provide an output when either of two input signals are applied

• All of the answers are correct

• None of the answers are correct

An advantage of air logic over electrical controls is that it ______________

• Is safe in places where electrical systems could cause fire or explosion

• Is less expensive for four or more relays

• Has a faster signal

• All of the answers are correct

• None of the answers are correct

To unlatch a pneumatic seal-in circuit, air logic circuits _____________-

• Use a push button valve

• Shut off the pneumatic supply

• Vent the air pilot of the DCV with the cam valve

• Use a shuttle valve

A shuttle valve exhausts an air pilot of a DCV when _____________

• One input is less than the other input

• Both inputs are pressurized

• Both inputs are vented

• None of the answers are correct

Air logic is popular in the food processing industry because ________________-

• The exhaust air can be used to eliminate odors

• Of the moisture present during cleanup

• It is less expensive than a PLC when more than four relays are needed

• It is cleaner than electricity

A _______________ spool design on a pneumatic DCV has no seals between the spool and the bore

• Packed

• Lapped

• Packed bore

• Grooved