१. Lime stones are generally known as
- Aqueous rocks
- Sedimentary rocks
- Stratified rocks
- all the above
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२. The initial setting time of hydraulic lime, is
- 30 minutes
- 60 minutes
- 90 minutes
- 120 minutes
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३. Minimum required water cement ratio for a workable concrete, is
- 0.30
- 0.40
- 0.50
- 0.60
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४. Seasoning is
- A process of removing sap
- creosoting
- painting with sodium silicate
- coating with tar
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५. Asphalt is obtained from
- Petroleum distillation
- Bitumen distillation
- Plastic distillation
- None of these
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