14. Sacrificial anodes are bolted inside the_____ of a heat exchanger 15. Sacrif
ID: 2086975 • Letter: 1
Question
14. Sacrificial anodes are bolted inside the_____ of a heat exchanger
15. Sacrificial anodes minimize______ within a heat exchanger
17. The two factors that determine the choice of tools and equipment for a specific heat exchanger
of a heat exchanger maintenance job are familiarity with the (a)________ and knowledge of the (b)______
18. Blockage in a shell-and-tube heat exchanger may range from relatively light accumulations of (a)_______ and (b)_______ to heavy blockage caused by (c)_______ in cooling water
22. Automatic cleaning systems work by either (a)________or (b)_______ means
23. Some automatic chemical cleaning systems periodically introduce chlorine into the incoming water to kill________ and prevent growth on tube walls
25. When a main condenser is to be flooded, jack or supports may be necessary to________
26. Maintenance of smaller heat exchangers is approached differently from large heat exchangens because the smaller components are (a)______ and can be moved by (b)______
Explanation / Answer
The answers are:
14. Sacrificial anodes are bolted inside the WALLS of a heat exchanger.
15. Sacrificial anodes minimize CORROSION (Sacrificial anodes work by oxidizing more quickly than the metal it is protecting, being consumed completely before the other metal reacts with the electrolytes) within a heat exchanger
17. The two factors that determine the choice of tools and equipment for a specific heat exchanger
of a heat exchanger maintenance job are familiarity with the (a) HEAT EXCHANGER and knowledge of the (b) TYPE OF DEPOSITS (Although aim of maintenance remains the same that is cleaning of heat transfer surfaces to prevent any kind of obstruction in the flow process).
18. Blockage in a shell-and-tube heat exchanger may range from relatively light accumulations of (a)SCALE DEPOSITS and (b)COROSSION to heavy blockage caused by (c) DISSOLVED SALTS in cooling water
22. Automatic cleaning systems work by either (a)INTERNAL (chemical) or (b) EXTERNAL (mechanical) means
23. Some automatic chemical cleaning systems periodically introduce chlorine into the incoming water to kill bacteria, algae, slime, mollusks, barnacles and sponges and prevent growth on tube walls
25. When a main condenser is to be flooded, jack or supports may be necessary to ARREST THE SPRING ACTION.
26. Maintenance of smaller heat exchangers is approached differently from large heat exchangers because the smaller components are (a) delicate and can be moved by (b) light pressure.
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