4Th Class Power Engineering Chapter 141

Front 1

Before cleaning the waterside and as far as is possible:

1) A scale sample should be taken and an analysis done

2) Mud drum sludge should be completely removed

3) A visual inspection of pressure parts should be completed

4) All drum internals should be removed

5) Tubes should be "turbined"

Back 1

A visual inspection of pressure parts should be completed

Front 2

A relatively new and safer chemical used in boiler cleaning and treatment is:

1) Sodium hydroxide

2) Chelates

3) Trisodium phosphate

4) Caustic soda

5) Hydrazine

Back 2

Chelates

Front 3

For an alkaline boil out, the boiler is maintained at a desired steam pressure for about:

1) 8 hours

2) 16 hours

3) 12 hours

4) 48 hours

5) 24 hours

Back 3

48 hours

Front 4

One of the main purposes of an external inspection is to:

1) Check the plant records, log books, etc

2) Check the operation of each safety shutdown device

3) Verify that scale is not present on or in the tubes

4) Observe operation and maintenance practice

5) Inspect all auxiliary equipment and pressure vessels

Back 4

Observe operation and maintenance practice

Front 5

The recommended procedures for a boiler inspection are stated in the:

1) ASME Boiler and Pressure Vessel Code, Section IV

2) ASME Boiler and Pressure Vessel Code, Section VII

3) CSA B51 Boiler Pressure Vessel and Pressure Piping Code

4) ASME Boiler and Pressure Vessel Code, Section I

5) Alberta Pressure Equipment Safety Regulation

Back 5

ASME Boiler and Pressure Vessel Code, Section VII

Front 6

Just before entering the waterside of the boiler it is important to:

1. Notify the inspector in writing of your intent to do so

2. Obtain permission to do so from plant management

3. Be wearing self-contained breathing apparatus SCBA

4. Test the atmosphere with an O2 “sniffer”

5. Ensure the chief engineer is aware of your intent

1) Test the atmosphere with an O2 "sniffer"

2) Notify the inspector in writing of your intent to do so

3) Be wearing self-contained breathing apparatus SCBA

4) Obtain permission to do so from plant management

5) Ensure the Chief Engineer is aware of your intent

Back 6

Test the atmosphere with an O2 "sniffer"

Front 7

When the boiler is removed from service, it can be drained once the temperature reaches approximately:

1) 150ºC

2) 50ºC

3) 70ºC

4) 90ºC

5) 30ºC

Back 7

90ºC

Front 8

The most popular acid for boiler cleaning is:

1) Chelate

2) Hydrochloric

3) Phosphoric

4) Sulphuric

5) Nitric

Back 8

Hydrochloric