engineering recuitment UPSSSC JE Civil 2024 Mock Test Construction Materials and Management Bricks and Mortar
Read the following statements and choose the correct answer.
Statement A: Timber preservative AsCu is a combination of, one part of arsenic pentaoxide (As2O5.2H2O), three parts of blue vitriol or copper sulphate (CuSO4.5H2O), and six parts of sodium or potassium dichromate ((Na or K)2Cr2O7).
Statement B: Total sulphate content in cement is calculated as SO3 and it should not be greater than 3.75%
Statement C: Weight of magnesia in cement should not exceed 7%.
Statement D: In standard bricks, the size of frog is 10 cm × 4 cm × 1 cm.
1
(A)-False, (B)-False, (C)-False, (D)-True
2
(A)-False, (B)-False, (C)-True, (D)-True
3
(A)-True, (B)-False, (C)-False, (D)-True
4
(A)-False, (B)-True, (C)-True, (D)-False