MCCCD Official Course Competencies:

MWR202  2005 Spring – 2011 Spring

Millwright Bulk and Unit Conveying

1.

Identify and explain the purpose of specific components of conveyor systems for bulk and unit handling. (I, II)

2.

Describe and/or illustrate specific conveyors arrangements. (I,II)

3.

List the complete sequence by which conveyor systems are erected. (I, II)

4.

Identify the factors that constitute a properly tensioned fastener and demonstrate three methods of tensioning a fastener. (I A)

5.

Identify and define drive terminal, power drive, take-up and pulley arrangements. (I A)

6.

Describe the difference in application of flexible and rigid couplings. (I A, B)

7.

Describe the purpose and operation of various brakes, backsteps and clutches. (I A, B)

8.

Describe the function and installation practices of specific conveyor attachments and components. (I A, B, C)

9.

Identify and describe specific types of idlers and rollers used in conveyor systems and calculate the quantity and spacing of idlers needed for a given conveyor system. (I A)

10.

Identify and describe specific types of pulleys used in conveyor systems. (I A)

11.

Describe the function and application of pulleys lagging and calculate pulley crown for specific conveyor systems. (I A)

12.

Identify specific types of feeders used in bulk conveying systems and describe their operation and installation within that system. (I A)

13.

Classify conveyors trippers according to type and mode of operation. (I A)

14.

Identify types and composition of specific conveyors belts and give examples of their application. (I A)

15.

List the components of single and multiple pulleys conveyors belt and describe the function of each component. (I A)

16.

Describe the correct procedures for storing and threading a conveyor belt. (I A)

17.

Demonstrate methods of laying out and squaring conveyors belt ends. (I A)

18.

Describe the procedures for making a vulcanized, endless splice and demonstrate the use of splicing tools in skiving and stripping down a conveyor belt. (I A)

19.

Demonstrate the procedures for making a mechanical belt splice with differing types of fasteners. (I A)

20.

Describe the function of specific belt cleaning devices. (I A)

21.

List the standard tracking sequences and identify the tracking effectiveness of each roll, idler or pulley in a specific conveyor system for bulk and unit handling. (I A)

22.

Demonstrate the procedures and for aligning conveyors components (i.e. frame trusses, pulleys, idlers and rollers) in bulk and unit handling. (I A)

23.

Describe tensioning conveyor belts for bulk and unit handling with manual take-up and gravity take-up. (I)

24.

Explain the function of screws conveyors and identify screw elevator components and describe the difference between helicoid and sectional screw flights. (I B)

25.

Identify the different styles of screw flights, determine screw helix and rotation, and describe the application of each style. (I B)

26.

Identify the types of screw conveyor bearings and seals by composition and style. (I B)

27.

List the specific sequence of assembly for a specific screw conveyor indicating the means of maintaining clearances and thrust loads. (I B)

28.

Identify and explain the function of components of bucket elevators. (I C)

29.

Identify by design and application the primary types of bucket elevators. (I C)

30.

Determine belt splices used on specific bucket elevators. (I C)

31.

List and explain the functions of specific gravity conveyors. (II)

32.

Identify and describe the specific types of live-roller conveyors. (II)

33.

List the major components of conveyors safety and summarize the safety provisions under each category. (I, II, III)

34.

Summarize the principles and characteristics of materials on moving belts. (III A)

MCCCD Official Course Outline:

MWR202  2005 Spring – 2011 Spring

Millwright Bulk and Unit Conveying

I. Bulk Handling Conveyors

A. Belt Type

1. Preliminary Installation

2. Conveyors Frame and Superstructure

3. Fasteners - Tension

4. Drive terminals and Power Drives

5. Direct coupled Drives

6. Brakes, Backstops and Clutches

7. Conveyors Attachments and Components - Couplings

8. Idlers and Rollers - Calculations

9. Pulleys - Lagging and Crown

10. Feeders

11. Trippers

12. Belting - Tensioning

13. Tracking

14. Tracking Aids - Trusses, Idlers, Pulleys, Rollers

15. Maintenance

16. Safety

B. Screw Conveyor and Elevators

1. Preliminary Installation

2. Flights

3. Bearings - Types, Composition and Style

4. Seals - Types, Composition and Style

5. Hangers

6. Shafts and Couplings

7. Drives

8. Troughs

9. Spouts and Gates

10. Assembly Sequence - Clearance and Load

11. Installation and Maintenance

12. Brakes and Clutches

13. Screw Flights - Helicoid and Sectional

14. Safety

C. Bucket Elevators

1. Preliminary Installation

2. Major Components

3. Types of Elevators

4. Buckets

5. Installation and Maintenance - Belt Splicing

6. Safety

II. Unit Handling Conveyor

A. Gravity Conveyor

1. Chutes and Slides

2. Roller

3. Slider Bed Slopes

4. Safety

B. Level and incline belt conveyor

1. Belt Tracking

2. Safety

C. Live Roller Conveyor

1. Flat Belt Actuated

2. Curve 'V' Belt Actuated

3. Chain Driven

4. Safety

III. Materials and Conveyer Safety Provisions

A. Characteristics of Materials in Motion

B. Materials Handling

1. Rigging

2. Hoisting

C. Moving Parts of Guards

D. Handrail, Toe Board and Ladder Cages

E. Load Reversal Protection

1. Backstops

2. Over Running Clutches

F. Overload Protection

1. Torque Limiters

2. Fluid Couplings

3. Shear Pins

4. Overload Switches

G. Aisles and Walkways

H. Hinge Sections

I. Safety Color Code