Module 8 Flashcards Preview

MT 108 Chapter 3 > Module 8 > Flashcards

Flashcards in Module 8 Deck (31):
1

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

Cylinder

2

a cylinder that can exert hydraulic force in either direction

Double-acting cylinder

3

a cylinder that can exert hydraulic force in one direction only

Single-acting cylinder

4

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

Telescoping cylinder

5

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

Two-piston cylinder

6

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

Cylinder

7

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

Two

8

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

Single-acting

9

A pull-type cylinder works on the _____ stroke.

In or Retracting

10

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

Piston

11

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

No

12

A positional cylinder has how many extended rods?

One

13

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

No

14

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

Fixed; Pivoted

15

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

Noncenterline

16

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

Aligned

17

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

Pivoted

18

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

System pressure
Flow capacity
Pump capacity
Hydraulic line size

19

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

Piston area; Fluid pressure

20

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

Acceleration

21

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

Cushioning

22

Hydraulic cylinders convert fluid force into

straight-line motion

23

In a double-acting cylinder, the thrust is

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

24

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

equal on both sides.

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

It usually does not require piston seals

26

The pistons of a two-piston cylinder always move

independently

27

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

tie rods

28

Cylinders that move heavy thrust loads are usually furnished with

square flanges

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

Piston speed

30

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

Frictional resistance

31

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

Prevent mechanical shock