Question31:-Which of the following statements related to boiler feed water
alkalinity is true?

Statement 1 - Excess alkalinity causes caustic embrittlement

Statement 2 - Alkalinity needs to be high enough to prevent corrision

A:-Both are correct
B:-Both are incorrect
C:-only 1 correct

D:-Only 2 correct

Correct Answer:- Option-A

Question32:-Statement 1 - Conductivity can be used to measure amount of total
dissolved solids in feed water

Statement 2 - Purity of steam leaving the boiler can be measured by measuring
conductivity of steam

Which of the above statements is correct?

A:-Statement 1 only
B:-Statement 2 only
C:-Statement 1 and 2
D:-Both are incorrect
Correct Answer:- Option-C

Question33:-Statement 1 - Phosphate treatment is to reduce Calcium of low
hardness water.

Statement 2 - Continuous blowdown in a boiler differs from intermittent blowdown
by keeping concentration levels constant

Which of the above is correct?

A:-only statement 1 is correct

B:-only statement 2 is correct

C:-both are correct

D:-both are incorrect

Correct Answer:- Option-C
Question 34:-ina steam boiler, losses are in the order of (low to high)

A\:-shell losses, Blowdown, Flue gases

B :-shell losses, Flue gases, Blowdown

C::-Blowdown, Shell losses, Flue gases

D:-Flue gases, Blowdown, Shell losses

Correct Answer:- Option-A

Question35:-Statement 1 - Scaling is the result of deposition of Calcium and
Magnesium into carbonates at higher temperatures

Statement 2 - Corrosion is mainly due to dissolved oxygen and partly by carbon
dioxide formed by decomposition of carbonates at high temperature

Which of the above statements is correct?