In the wet process of Portland cement manufacture, the rotary kiln operates with a hottest-zone temperature of approximately:
A{'text': 'About 800 degree C', 'label': 'A'}
B{'text': 'About 1500 degree C', 'label': 'B'}
C{'text': 'About 1200 degree C', 'label': 'C'}
D{'text': 'About 2000 degree C', 'label': 'D'}
Answer & Solution
Correct answer: B. {'text': 'About 1500 degree C', 'label': 'B'}
1. §1.2 (d) states: 'The temperature in the hottest part of the kiln is about 1500 degree C resulting in the slurry getting converted into a fused mass of 3 mm to 20 mm size known as clinker.'
2. The other options are out of the named range.
_Source: IGNOU ET-522 Block-1 Unit-1 Cement, §1.2(d), p. 6_
Related questions
In the Standard Consistency test described in §1.10, the percentage of water 'P' is definePer Table 1.5, the maximum permitted FINAL setting time of Ordinary Portland Cement is:Per Table 1.5, the soundness of Ordinary Portland Cement tested by the Le Chatelier methodThe minimum specific surface (by Blaine air permeability) prescribed for Ordinary PortlandOil well cement, per the source, is engineered to remain mobile and then harden under apprAir entraining cement is used principally to improve the resistance of concrete to:Super sulphate cement is produced by inter-grinding granulated blast furnace slag with gypThe cement most ideally suited for mass concrete construction such as dams, per the source