Chapter 12 Routine Boiler Maintenance & Inspection

Question 1

1. In the circulating method, the acid solution is circulated continuously through the unit at a temperature of about _____ until the cleaning action is completed as shown by tests.

A. 100°C (212°F) 
B. 65°C (150°F) 
C. 50°C (98°F) 
D. 120°C (248°F) 
E. 77°C (170°F)

Answer 1

B. 65°C (150°F)

Question 2

2. The boiler inhibited acid cleaning method most commonly uses a 5% solution of inhibited _____ acid.

A. Hydrochloric 
B. Sulphuric 
C. Nitric 
D. Carbonic 
E. Acetic

Answer 2

A. Hydrochloric

Question 3

3. When the boiler water has cooled to about _____ open the blowdown valves and drain the boiler.

A. 90°C (194°F) 
B. 110°C (230°F) 
C. 99°C (210°F) 
D. 134°C (273°F) 
E. 60°C (140°F

Answer 3

A. 90°C (194°F)

Question 4

4. If damp conditions exist during the idle season, the metal surfaces should be painted with a protective coating such as:

A. Latex paint 
B. Oil based paint 
C. Light oil 
D. Grease 
E. Fuel oil

Answer 4

C. Light oil

Question 5

5. In the wet boiler lay up method after the boiler water has cooled it is filled:

A. To half a gauge glass 
B. Completely 
C. To the top of the gauge glass 
D. To the bottom of the gauge glass
E. To half fill the boiler

Answer 5

B. Completely

Question 6

6. When inspecting the fireside of the boiler the surfaces are examined for bulges or blisters which would indicate:

A. Corrosion 
B. Erosion 
C. Caustic embrittlement 
D. Oxygen pitting 
E. Overheating

Answer 6

E. Overheating

Question 7

7. During inhibited acid cleaning the boiler must be adequately vented because _____ is produced by the reaction of acid with iron and could cause a fire or explosion.

A. Carbon monoxide 
B. Carbon dioxide 
C. Hydrogen 
D. Nitrogen 
E. Oxygen

Answer 7

C. Hydrogen

Question 8

8. When examining the waterside surfaces, the inspector will be looking for signs of:

A. Erosion 
B. Bulges 
C. Blisters 
D. Cracking of the metal 
E. Overheating

Answer 8

D. Cracking of the metal

Question 9

9. Flame retarders can be found in the boiler:

A. Steam drum 
B. Shell 
C. Water tubes 
D. Fire tubes 
E. Mud drum

Answer 9

D. Fire tubes

Note:Flame retarders

Question 10

10. Portable lamps of _____ or less, with current supplied from transformers or batteries, should be provided to eliminate the danger of electrocution to personnel inside the boiler.

A. 1.5 V 
B. 12 V 
C. 24 V 
D. 32 V 
E. 110 V

Answer 10

C. 24 V

Question 11

11. Repairs affecting the pressure parts of a boiler may only be made after consultation with and the approval of:

A. The shift engineer 
B. The chief engineer
C. The authorized inspector 
D. A qualified welder 
E. A professional engineer

Answer 11

C. The authorized inspector

Question 12

12. Whenever there are signs of a tube leak during boiler operation:

A. Watch that it does not get worse 
B. Maintain a steady firing rate 
C. Shut down the boiler immediately 
D. Close the stop valve on the steam outlet 
E. Reduce the firing rate to the minimum

Answer 12

C. Shut down the boiler immediately

Question 13

13. The internal inspection is a thorough examination of both the _____ and the _____ of the boiler.
14. Fireside
15. Outside
16. Waterside
17. Topside

A. 1, 2 
B. 2, 4 
C. 2, 3 
D. 1, 3 
E. 1, 4

Answer 13

D. 1, 3

Note: Fireside and Waterside

Question 14

14. When the fires are out, allow the boiler to cool until the pressure is about _____ and then open the drum vents.

A. 35-70 kPa (5-10 psi) 
B. 7-35 kPa (1-5 psi) 
C. 70-100 kPa (10-15 psi) 
D. 15-20 kPa (2-3 psi) 
E. 20-35 kPa (3-5 psi)

Answer 14

A. 35-70 kPa (5-10 psi)

Question 15

15. Chemicals used for the alkaline boil out of a boiler consist of a combination of which of the following.
16. Sodium hydroxide
17. Sodium sulphite
18. Sodium phosphate
19. Sodium carbonate
20. Sodium chloride

A. 1, 2, 3 
B. 2, 3, 4 
C. 1, 3, 4 
D. 2, 3, 4 
E. 1, 2, 4

Answer 15

C. 1, 3, 4
Sodium hydroxide
Sodium phospate
Sodium carbonate

Question 16

16. Power Engineers (boiler operators) are generally not called upon to make any boiler repairs they are usually done by an experienced:

A. Steam fitter 
B. Plumber 
C. Carpenter 
D. Boilermaker 
E. Millwright

Answer 16

D. Boilermaker

Question 17

17. In the wet boiler lay up method chemicals are added to bring the boiler water to the required: 
A. Acidity 
B. Excess oxygen scavenger level 
C. TDS 
D. pH 
E. Density

Answer 17

B. Excess oxygen scavenger level

Question 18

18. The dye penetrant, entrapped in a crack, is brought to the surface by the action of the: 
A. Dye penetrant 
B. Ultrasound 
C. Ultraviolet light 
D. Developer 
E. Black ligh

Answer 18

D. Developer

Question 19

19. Although cast iron is a _____ material that cracks relatively easily, it has proven to be a satisfactory material for low-pressure boilers.

A. Strong 
B. Fragile 
C. Malleable 
D. Ductile 
E. Brittle

Answer 19

E. Brittle

Question 20

20. After cleaning, cast-iron boilers should be left completely filled with _____ in order to reduce corrosion.

A. A mixture of oil and antifreeze 
B. A slightly acidic solution 
C. A slightly basic solution 
D. Water 
E. Light oil

Answer 20

D. Water