Module 8

Question 1

a cylinder that can exert pneumatic force in either direction

Answer 1

Double-acting cylinder

Question 2

a cylinder having a single piston that reciprocates, providing thrust in both directions

Answer 2

Double-rod (or double-end rod) cylinder

Question 3

a cylinder with a power stroke in only one direction

Answer 3

Single-acting cylinder

Question 4

a cylinder containing two pistons capable of independent motion

Answer 4

Two-piston cylinder

Question 5

the air capacity of a control valve in relation to a cylinder

Answer 5

Capacity coefficient (Cv)

Question 6

Pneumatic cylinders convert the pressure of compressed air into _____ motion thrust.

Answer 6

Straight-Line

Question 7

Lubrication of an air cylinder is required to improve the _____.

Answer 7

Service Life

Question 8

Pneumatic cylinders resemble hydraulic cylinders but do not require _____ air lines.

Answer 8

Return

Question 9

A double-acting pneumatic cylinder can exert force in _____ direction(s).

Answer 9

Two

Question 10

A cylinder having a power stroke in one direction only is called a(n) _____ cylinder.

Answer 10

Single-Acting

Question 11

The retracting speed of a cylinder is usually controlled by a(n) _____ metering valve.

Answer 11

Exhaust Flow Control

Question 12

The heads or caps of most industrial pneumatic cylinders are held in place by _____.

Answer 12

Tie Rods

Question 13

Almost all formed piston rings or seals are made of _____ materials.

Answer 13

Synthetic

Question 14

Noncenterline cylinder mountings create a(n) _____ loading condition in the supporting structure.

Answer 14

Off-Center

Question 15

The movement of a pivoting cylinder must be controlled to prevent the piston rod from being _____.

Answer 15

Bent

Question 16

Before installing a new cylinder in an existing pneumatic system, make sure the cylinder will withstand the air system _____.

Answer 16

Pressure

Question 17

When selecting a cylinder, make sure it is large enough to move the _____.

Answer 17

Load

Question 18

When determining the cylinder diameter needed to deliver a given force at a given air pressure, you must take into account the _____ in the pneumatic system.

Answer 18

Pressure Losses

Question 19

When checking the pneumatic system flow capacity for a new cylinder, always check the ratings of the control valves and the _____ valves.

Answer 19

Regulator

Question 20

When installing an air cylinder, make sure that the port size of the cylinder is the same as the port size of the _____.

Answer 20

Control valve

Question 21

A cushioning device is used in most air systems to prevent _____.

Answer 21

Shock

Question 22

The service life of pneumatic cylinder is improved with _____.

Answer 22

Lubrication

Question 23

A pneumatic cylinder with lugs, feet, or side-tapped holes for mounting is classified as being _____ mounted.

Answer 23

Fixed, noncenterline

Question 24

The major difference between pneumatic and hydraulic cylinders is the _____.

Answer 24

Absence of return lines

Question 25

The amount of motion in a pivoting cylinder should be restricted to prevent the _____.

Answer 25

Piston rod from bending

Question 26

A cylinder that produces work only on its extending stroke is called a _____ cylinder.

Answer 26

Single-acting

Question 27

When you divide the volume of air needed per cylinder stroke by the amount of time one stroke takes, you are calculating _____.

Answer 27

Required airflow rate.

Question 28

Piston retraction speed is commonly controlled by _____.

Answer 28

Restricted exhaust air.

Question 29

When selecting a cylinder, always make sure that the cylinder ports are the same size as the _____.

Answer 29

Control valve ports.

Question 30

Piston rings (or cups) and seals of pneumatic cylinders are usually made of _____.

Answer 30

Synthetic materials.

Question 31

Shock can be prevented in a pneumatic cylinder by using _____.

Answer 31

Cushioning devices.