Couplings, Clutches and Breaks

Question 1

What are three (3) types of positive contact clutches?

Answer 1

• Square Jaw
• Spiral Jaw
• Multiple tooth design

Question 2

Which chain coupling allows for the most end float?

Answer 2

Single strand roller chain

Question 3

What are single universal joints limited to?

Answer 3

• Low forces
• Low Operating Speeds
• Small angles

Question 4

Describe square jaw clutches?

Answer 4

They can be engage at very low speeds at any direction (10 rpm max)

Question 5

Where are double universal joints used?

Answer 5

Where there is deliberate angular, or parallel offset

Question 6

Describe spiral jaw clutches

Answer 6

They can be engaged at higher speeds and can drive in one direction only (max 150 RPM)

Question 7

Describe a multiple tooth clutch

Answer 7

They use a large number of small teeth for engagement. They can engage at 300 rpm max

Question 8

What is a friction clutch?

Answer 8

They provide a smooth transfer of power during engagement. They can be engaged at any speed

Question 9

What is the advantage of a chain coupling?

Answer 9

It is very easy to disconnect. It can be replaced without moving either the drive or driven shaft

Question 10

What are the two (2) classes of friction clutches?

Answer 10

• Radial

* Axial

Question 11

What are the two (2) types of radial friction clutches?

Answer 11

*Expanding Shoe
and
*Contracting Shoe

Question 12

What are the three (3) types of axial friction clutches?

Answer 12

• Single disc
• Multi disc
• Cone

Question 13

What does a machine lever, over center mean?

Answer 13

it allow the clutch to be locked or unlocked without continuous mechanical pressure

Question 14

How must double universal joints be installed?

Answer 14

They must be assembled in phase

Question 15

Where are CV joints used?

Answer 15

They are used where the joints angles are unequal or changing

Question 16

Describe a ribbed coupling and its used?

Answer 16

They are clamped to keep all the parts in place, but the power is transmitted through the keys. they are used in heavy loads and torque machines

Question 17

What is a cone clutch?

Answer 17

Is a cross between a radial and axial clutch on which provides a mechanical advantage due to the wedge in the drum. They have the tendency to grab

Question 18

How is an expanding shoe clutch activated?

Answer 18

Hydraulically or Hydraulics

Question 19

One disadvantage of a centrifugal coupling is?

Answer 19

It’s never fully engaged.

Question 20

In order for a universal joint coupling to accommodate angular and offset it must be a?

Answer 20

Double Universal Joint

Question 21

A splined connection is a universal joint coupling is used to?

Answer 21

Allow for axial movement

Question 22

How can we be assured of proper clamping force in ribbed coupling?

Answer 22

Make sure that there is a gap between the halves after properly torquing the fasteners

Question 23

What coupling must be removed in order to do an alignment?

Answer 23

Multi-bore

Question 24

Which chain coupling can transmit the most amount of power?

Answer 24

Silent Chain

Question 25

Which class of couplings is most likely to require lubrication?

Answer 25

Mechanical flexible

Question 26

Which coupling that’s rigid is suitable for low speeds and torque applications?

Answer 26

Sleeve

Question 27

How is a contacting shoe clutch activated?

Answer 27

Pneumatically

Question 28

What type of clutch uses a pressure plate?

Answer 28

Axial friction

Question 29

Which coupling has a poor torsional flexibility?

Answer 29

Gear coupling

Question 30

Another name for the turbine in a fluid coupling is?

Answer 30

Runner

Question 31

What is the reason for curved teeth in a gear coupling?

Answer 31

Increased the amount of misalignment that the coupling can tolerate compare to the one with straight teeth

Question 32

Which mechanical flexible coupling does not required lubrication?

Answer 32

Synthetic Chain