1.
What is the ideal range for water hardness?
Correct Answer
D. 150-350 parts per million
Explanation
The ideal range for water hardness is 150-350 parts per million. This range ensures that the water is not too soft, which can lead to corrosion and an unpleasant taste, and not too hard, which can cause scale buildup and reduce the effectiveness of soaps and detergents. Water within this range is considered moderately hard, providing a balance between the negative effects of both soft and hard water.
2.
High sulfate content can cause:
Correct Answer
D. Corrosion and unstable emulsion
Explanation
High sulfate content in water can lead to corrosion and the formation of an unstable emulsion. Sulfate ions can react with metal surfaces, causing corrosion and degradation of pipes, fittings, and other infrastructure. Additionally, sulfate ions can also interfere with the stability of emulsions, which are mixtures of two immiscible liquids, by disrupting the balance between the dispersed and continuous phases. This can result in the separation of the emulsion, leading to instability and potential performance issues in various industrial processes.
3.
What is NOT a possible side effect of having a low ph balance?
Correct Answer
B. Stains on aluminum
Explanation
Having a low pH balance can cause corrosion, bad odors, and increased risk of machine corrosion. However, stains on aluminum are not a possible side effect of having a low pH balance.
4.
Excessive foaming is a sign of?
Correct Answer
A. High pH value
Explanation
Excessive foaming is a sign of high pH value. When the pH level of a substance is high, it indicates that it is more alkaline. Alkaline substances tend to produce more foam when agitated or mixed with other substances, such as soap or detergent. This is why excessive foaming is often observed in situations where the pH level is high.
5.
How to test ph value:
Correct Answer
B. Use a test strip
Explanation
The correct answer is to use a test strip. Test strips are specifically designed to measure the pH value of a substance. They contain indicator chemicals that change color based on the acidity or alkalinity of the solution being tested. By comparing the color of the test strip to a color chart, one can determine the pH value of the substance accurately. This method is widely used and considered reliable for testing pH levels.
6.
Why is concentration important?
Correct Answer
D. All of the above
Explanation
Concentration is important because it leads to increased corrosion protection, better cutting performance, and decreases foaming action. When a substance is more concentrated, it can provide stronger protection against corrosion, allowing for longer-lasting and more durable materials. Additionally, a higher concentration can enhance cutting performance by increasing the effectiveness of cutting agents. Finally, a concentrated solution reduces foaming action, which can be beneficial in various industrial processes where excessive foam can interfere with operations. Therefore, all of the given options are correct explanations of why concentration is important.
7.
How to correct a low concentration:
Correct Answer
C. Add emulsion
Explanation
To correct a low concentration, adding an emulsion is the correct answer. An emulsion is a mixture of two or more immiscible substances, such as oil and water, where one substance is dispersed in the other. Adding an emulsion can help increase the concentration of the desired substance in the solution. Adding water or coolant may dilute the concentration further, while none of the above options would effectively correct a low concentration.
8.
Why is the Jet Mixer ideal for mixing emulsion:
Correct Answer
C. Both above
Explanation
The Jet Mixer is ideal for mixing emulsion because it maintains a constant concentration and ensures a finely mixed emulsion. By maintaining a constant concentration, the Jet Mixer ensures that the emulsion is consistently mixed and does not separate or become uneven. Additionally, the Jet Mixer ensures a finely mixed emulsion by using high velocity jets to create turbulence and enhance mixing. This helps to break down any clumps or particles and distribute them evenly throughout the emulsion. Therefore, both of these factors make the Jet Mixer an ideal choice for mixing emulsion.
9.
How to know when the Jet Mixer needs cleaning:
Correct Answer
D. All of the above
Explanation
The correct answer is "All of the above." This means that all of the mentioned factors, including coarse emulsion, low concentration, and low throughput, indicate that the Jet Mixer needs cleaning. These issues can arise despite using the correct water, suggesting that the problem lies with the mixer itself and not the water being used.
10.
How to clean the Jet Mixer:
Correct Answer
D. All of the above
Explanation
The correct answer is "All of the above" because the question asks how to clean the Jet Mixer, and all the options listed (removing the nozzle and cleaning, cleaning the pipe and housing, and replacing the 2 O-rings if needed) are necessary steps to properly clean the Jet Mixer.
11.
What is ideal ph level?
Correct Answer
A. 8.4-9.2
Explanation
The ideal pH level is 8.4-9.2. pH is a measure of acidity or alkalinity, with a pH of 7 being neutral. A pH level above 7 is considered alkaline. The given range of 8.4-9.2 falls within the alkaline range, indicating that the ideal pH level is slightly alkaline. This pH range is often recommended for certain applications, such as swimming pools or aquariums, where maintaining a slightly alkaline environment is beneficial for the organisms or chemicals involved.