Building Materials
Which of the following cements contains maximum percentage of dicalcium silicate?

Low heat cement
Sulphate resisting cement
Rapid hardening cement
Ordinary Portland cement

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Building Materials
A queen closer is a

Brick laid with its length parallel to the face or direction of wall
Brick laid with its breadth parallel to the face or direction of wall
Brick having the same length and depth as the other bricks but half the breadth
Brick with half the width at one end and full width at the other

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