Pneumatic Systems And Tubing/Hoses

Question 1

Which type of directional control valve is an on-Off valve in a pneumatic system?

Answer 1

Two-way valve

Question 2

How does a regulator in a pneumatic system respond to a decrease of downstream air pressure?

Answer 2

Increases orifice size to increase air flow

Question 3

What normally open valve is installed on hoses to prevent whipping in the event of fitting or hose failure?

Answer 3

Excess flow valve

Question 4

Which type of control valve can be installed to allow for the selection of a higher pressure of two input air supplies?

Answer 4

Shuttle valve

Question 5

What are the three methods for sealing a pneumatic DCV?

Answer 5

Packed spool
Packed bore
Sliding plate

Question 6

The air pressure in a pneumatic tool will determine?

Answer 6

Torque

Question 7

The airflow in a pneumatic tool will determine?

Answer 7

Speed

Question 8

What is the function of a venting type regulator?

Answer 8

Allow pressures above regulator setting to be relieved

Question 9

Excess flow valve should be installed on air hoses larger then?

Answer 9

1/2”

Question 10

How is pneumatic tubing sized?

Answer 10

Outside diameter

Question 11

What is the proper flare angle for fittings used in hydraulic systems?

Answer 11

37 degrees for H.P. jic

45 degrees for L.P. SAE fittings

Question 12

What is the best piping system for compressed air?

What is the worst but simplest/cheapest?

Answer 12

Loop system

Grid system

Question 13

What valve in a pneumatic system is an “OR” valve and which is a “AND” function valve?

Answer 13

OR valve = Shuttle valve

AND valve = two pressure valve

Question 14

In a five-way/three-position valve what are the 3 most common centres?

Answer 14

Pressure centre (regen) 
Exhaust centre (floating) 
Blocked centre