Civil Engineering MCQAE Level Civil Engineering
Calcium concentration is 60 mg/L as Ca and magnesium is 12 mg/L as Mg. Total hardness as CaCO3 is nearly
Environmental EngineeringOriginal practiceMEDIUM
Choose the correct answer
A
199.2 mg/L
B
99.6 mg/L
C
72 mg/L
D
298.8 mg/L
Correct Answer
A. 199.2 mg/L
AI Detailed Explanation & IS Code Reference
Unlock the reasoning, formula path and code-linked notes inside your student dashboard.
Hardness as CaCO3 ≈ 2.5Ca + 4.1Mg = 199.2 mg/L.
ScoreCardAI links this solution with subject, topic and difficulty signals so your scorecard can identify weak areas after a full mock test.
Concept shortcut
IS/IRC reference
Common trap
Practice more Civil Engineering questions
This MCQ belongs to AE Level Premium Test Series. Full tests include timed attempts, rank comparison and subject-wise analysis.