Clutches & Brakes

Question 1

Used to connect the prime mover to the load that allows torque transmission to be interrupted?

Answer 1

Clutch

Question 2

What are brakes used for?

Answer 2

Stop
Hold
Slow a load

Question 3

T or F:
Clutches offer a smooth transmission of power?

Answer 3

True

Question 4

Name 3 methods of torque transmission:

Answer 4

1) Frictional forces
2) Electromagnetic
3) Mechanical lockup

Question 5

What is the most common method of torque transmission?

Answer 5

Frictional

Question 6

Name 4 actuation methods of brakes and clutches:

Answer 6

1) Mechanical
2) Electromagnetic
3) Pneumatic
4) Hydraulic

Question 7

Non friction clutches and brakes that employs magnetic attraction to transfer torque from input to output?

Answer 7

Magnetic and Electromagnetic clutches

Question 8

Which type of clutch and brakes are commonly used in tension and positioning applications in which speed changes continually?

Answer 8

Magnetic particle

Question 9

What must happen for Eddy current clutches and brakes to work?

Answer 9

Relative motion between two magnetic surfaces

Question 10

Which clutch has members engage by direct contact?

Answer 10

Mechanical lock up

Question 11

T or F:
Bigger particle more lockup, but less speed

Answer 11

True

Question 12

How is an Eddy current clutch energized?

Answer 12

DC coil and rotation

Question 13

How do mechanical lockup clutches engage?

Answer 13

Direct contact

Question 14

Which type of clutch uses square teeth that lock into matching recess in facing members?

Answer 14

Square jaw clutches

Question 15

Name 5 unidirectional clutches:

Answer 15

1) Wrap spring
2) Sprag
3) Ramp
4) Roller
5) Spiral

Question 16

Name 3 bi directional clutches:

Answer 16

1) Magnetic
2) Electromagnetic
3) Multiple tooth

Question 17

Which clutch will overrun if the output rotates faster than the input?

Answer 17

Sprag

Question 18

Which clutch has both greater speeds and greater torque?

Answer 18

Centrifugal clutch

Question 19

Which clutch is like a weed eater or chainsaw?

Answer 19

Centrifugal clutch

Question 20

Most common clutch for starting and stopping?

Answer 20

Friction type

Question 21

Which type of clutch links input and output members with a coiled spring?

Answer 21

Wrap spring

Question 22

Name 2 clutches that run at very low rpms:

Answer 22

1) Square jaw
2) Multiple tooth