Which of the following acids is preferable...

Question 1 of 270705eccef9cbacbc34ba4d45868

Which of the following acids is preferable and most commonly used for scale removal from the heating surfaces of the jacket-water heated submerged-tube evaporator?

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Question 1 of 27070

Which of the following acids is preferable and most commonly used for scale removal from the heating surfaces of the jacket-water heated submerged-tube evaporator?

🔍 Key Concepts

• Scale removal from evaporators and boilers typically uses mild acids that dissolve mineral deposits without attacking metal surfaces. • Concentration of an acid greatly affects how corrosive it is to metals and how safe it is to handle aboard ship. • The difference between strong mineral acids (like hydrochloric and sulfuric) and organic or weaker acids in terms of corrosion risk and control.

💭 Think About

• Which of the listed acids (and concentrations) would be strong enough to dissolve calcium scale but gentle enough not to seriously attack steel, copper alloys, gaskets, and fittings? • On a ship, what additional practical factors matter for a cleaning chemical besides effectiveness (for example: ease of handling, fumes, control over reaction rate, and safety for crew and equipment)? • How does using a concentrated strong acid differ from using a diluted or milder acid when cleaning enclosed equipment like a submerged‑tube evaporator?

✅ Before You Answer

• Eliminate any acids or concentrations that would be excessively corrosive or dangerous in confined machinery spaces. • Think about which option is commonly supplied commercially as a controlled, relatively safe descaling chemical for marine service. • Ask: Which choice represents a practical, routinely used descaling agent rather than a lab‑type or extreme cleaning chemical?