Power Engineering 3B1 Chapter 10
Questions and Answers| Latest Update
1. An accurate pH reading of boiler water may be obtained by:
a. Using litmus paper in the water sample
b. Measuring the hydrogen ion concentration in the water sample
c. The total alkalinity test
d. Completing the hardness test
e. Completing a phosphate test Correct Ans-b. Measuring the hydrogen ion
concentration in the water sample
2. The test used to determine the ppm of phosphate in the boiler water:
a. Has a sample with an end colour of blue
b. Requires the addition of potassium-iodide-iodate solution be added to the
sample
c. Uses an indicator which causes the water sample to turn yellow at the end point
of the test
d. Requires sulphuric acid be titrated into the sample until a faint pink colour
develops
e. Requires the addition of a methyl orange indicator Correct Ans-a. Has a
sample with an end colour of blue
3. The sodium sulphite test on boiler water:
a. Requires an amount of starch be added to the sample
b. Should be filtered prior to adding test chemicals
c. Should produce an end reading of 20 ppm or less
d. Indicates the acidity of the boiler water
e. the Total Dissolved Solids in the boiler water measures Correct Ans-a.
Requires an amount of starch be added to the sample
4. When testing boiler water for dissolved solids:
a. We measure the amount of electrical current the sample will conduct
b. We must neutralize the oxide ion first
c. Phenolphthalein is added to the sample to cause a blue colour to appear,
5. neutralizing the water
6. d. Filter the sample, then add sulphuric acid to neutralize the water
, 7. e. Measure the "m" and "P" alkalinities Correct Ans-a. We measure the amount of
electrical current the sample will conduct
8. When using a meter to determine the pH of boiler water:
a. The dissolved salts in the sample should first be neutralized
b. The voltage between the electrodes will vary according to the hydrogen ion
concentration of the sample
c. The hydrogen ion concentration generates a current in the solution, which is
measured and read in pH numbers
d. The voltage between the electrodes will vary inversely to the concentration of
hydrogen ions
e. the voltage between the electrodes is not effected by the concentration of
hydrogen ions Correct Ans-b. The voltage between the electrodes will vary
according to the hydrogen ion concentration of the sample
9. Shot feeding involves the injection of chemicals over a relatively ______ period of time.
a. long
b. intemittent
c. short
d. measured Correct Ans-c. short
10. A _________ feed system. This involves feeding the chemicals to the boiler system at the
most efficient injection points and at a steady and continuous rate.
a. closed bypass
b. shot
c. slug
d. continuous Correct Ans-d. continuous
11. With the _________ feed system, it is common practice to mix one batch of chemicals
per day.
a. closed bypass
b. shot
c. slug
d. continuous Correct Ans-d. continuous
Questions and Answers| Latest Update
1. An accurate pH reading of boiler water may be obtained by:
a. Using litmus paper in the water sample
b. Measuring the hydrogen ion concentration in the water sample
c. The total alkalinity test
d. Completing the hardness test
e. Completing a phosphate test Correct Ans-b. Measuring the hydrogen ion
concentration in the water sample
2. The test used to determine the ppm of phosphate in the boiler water:
a. Has a sample with an end colour of blue
b. Requires the addition of potassium-iodide-iodate solution be added to the
sample
c. Uses an indicator which causes the water sample to turn yellow at the end point
of the test
d. Requires sulphuric acid be titrated into the sample until a faint pink colour
develops
e. Requires the addition of a methyl orange indicator Correct Ans-a. Has a
sample with an end colour of blue
3. The sodium sulphite test on boiler water:
a. Requires an amount of starch be added to the sample
b. Should be filtered prior to adding test chemicals
c. Should produce an end reading of 20 ppm or less
d. Indicates the acidity of the boiler water
e. the Total Dissolved Solids in the boiler water measures Correct Ans-a.
Requires an amount of starch be added to the sample
4. When testing boiler water for dissolved solids:
a. We measure the amount of electrical current the sample will conduct
b. We must neutralize the oxide ion first
c. Phenolphthalein is added to the sample to cause a blue colour to appear,
5. neutralizing the water
6. d. Filter the sample, then add sulphuric acid to neutralize the water
, 7. e. Measure the "m" and "P" alkalinities Correct Ans-a. We measure the amount of
electrical current the sample will conduct
8. When using a meter to determine the pH of boiler water:
a. The dissolved salts in the sample should first be neutralized
b. The voltage between the electrodes will vary according to the hydrogen ion
concentration of the sample
c. The hydrogen ion concentration generates a current in the solution, which is
measured and read in pH numbers
d. The voltage between the electrodes will vary inversely to the concentration of
hydrogen ions
e. the voltage between the electrodes is not effected by the concentration of
hydrogen ions Correct Ans-b. The voltage between the electrodes will vary
according to the hydrogen ion concentration of the sample
9. Shot feeding involves the injection of chemicals over a relatively ______ period of time.
a. long
b. intemittent
c. short
d. measured Correct Ans-c. short
10. A _________ feed system. This involves feeding the chemicals to the boiler system at the
most efficient injection points and at a steady and continuous rate.
a. closed bypass
b. shot
c. slug
d. continuous Correct Ans-d. continuous
11. With the _________ feed system, it is common practice to mix one batch of chemicals
per day.
a. closed bypass
b. shot
c. slug
d. continuous Correct Ans-d. continuous
