Module 8

Question 1

a device that converts the pressure and movement of hydraulic fluid into straight-line mechanical force and motion

Answer 1

Cylinder

Question 2

a cylinder that can exert hydraulic force in either direction

Answer 2

Double-acting cylinder

Question 3

a cylinder that can exert hydraulic force in one direction only

Answer 3

Single-acting cylinder

Question 4

a cylinder having from two to six sleeves that slide or nest together

Answer 4

Telescoping cylinder

Question 5

a cylinder with two independent pistons that con move together or individually

Answer 5

Two-piston cylinder

Question 6

The actuating device used to convert fluid pressure into straight-line mechanical force is the hydraulic _____.

Answer 6

Cylinder

Question 7

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

Answer 7

Two

Question 8

A cylinder that can exert force in one direction only is called a(n) _____ cylinder.

Answer 8

Single-acting

Question 9

A pull-type cylinder works on the _____ stroke.

Answer 9

In or Retracting

Question 10

The rod diameter of a ram cylinder is almost equal to the _____ diameter.

Answer 10

Piston

Question 11

Must the two pistons in a two-piston cylinder move in unison?

Answer 11

No

Question 12

A positional cylinder has how many extended rods?

Answer 12

One

Question 13

Should the piston rods of jig or fixture cylinders be allowed to rotate?

Answer 13

No

Question 14

The two methods of mounting cylinders in position are the _____ and _____ mounting techniques.

Answer 14

Fixed; Pivoted

Question 15

What type of fixed cylinder mounting produces off-center loading in the supporting structure?

Answer 15

Noncenterline

Question 16

When cylinders are mounted on machine tools, they must be _____ properly.

Answer 16

Aligned

Question 17

Trunnion-mounted or clevis-mounted cylinders are classed as being _____ cylinder mountings.

Answer 17

Pivoted

Question 18

List four things you must know in order to select the proper cylinder for an existing system.

Answer 18

System pressure
Flow capacity
Pump capacity
Hydraulic line size

Question 19

You can calculate the amount of force a cylinder exerts by multiplying _____ times _____.

Answer 19

Piston area; Fluid pressure

Question 20

When calculating the force required to move a load, starting friction and the _____ factor must be taken into account.

Answer 20

Acceleration

Question 21

Hydraulic or mechanical shock is prevented in a cylinder by using a(n) _____ device.

Answer 21

Cushioning

Question 22

Hydraulic cylinders convert fluid force into

Answer 22

straight-line motion

Question 23

In a double-acting cylinder, the thrust is

Answer 23

greater when the piston forces the piston rod out of the cylinder.

Question 24

A double-end rod cylinder has a piston surface area that is

Answer 24

equal on both sides.

Question 25

Which of the following is true of a ram cylinder?

a. It can exert force in either direction
b. It is a double-acting cylinder
c. It usually does not require piston seals
d. Its rod diameter is larger than the piston diameter

Answer 25

It usually does not require piston seals

Question 26

The pistons of a two-piston cylinder always move

Answer 26

independently

Question 27

The end caps or heads of most industrial hydraulic cylinders are held in place by

Answer 27

tie rods

Question 28

Cylinders that move heavy thrust loads are usually furnished with

Answer 28

square flanges

Question 29

To select the proper hydraulic cylinder for use in an existing system, you must know all of the following except

a. flow capacity
b. piston speed
c. pump capacity
d. system pressure

Answer 29

Piston speed

Question 30

To determine the total cylinder force, you must multiply the load times the acceleration factor and add the

Answer 30

Frictional resistance

Question 31

What is the purpose of the cushioning device used with a hydraulic cylinder?

Answer 31

Prevent mechanical shock