Question 66Steam Plants - Assistant Engineer

70% to pass

Steam drum water level indicators must be calibrated to compensate for density differences between the indicated drum water level, and the actual drum water level. If no compensation is made, the indicator will show a _______________.

Alower level than exists in the drum with the error becoming greater as the drum pressure decreases

Blower level than exists in the drum with the error becoming greater as the drum pressure increases

Chigher level than exists in the drum with the error becoming greater as the drum pressure decreases

Dhigher level than exists in the drum with the error becoming greater as the drum pressure increases

AI Explanation

The correct answer is B) lower level than exists in the drum with the error becoming greater as the drum pressure increases. This is because the density of water decreases as the pressure increases. If the water level indicator is not calibrated to compensate for this, it will show a lower level than the actual water level in the steam drum, and the error will become greater as the drum pressure increases. The other options are incorrect because A) the error would become greater as the pressure decreases, C) the indicator would show a higher level than the actual water level, and D) the error would become greater as the pressure increases, which is the opposite of the correct answer.