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WorksheetsDay 84-Dec 20-worksheet-Diploma-Cement part 1
Total questions: 15
Worksheet time: 10mins
Excess lime in cement primarily leads to:
Quick setting and reduced strength
Increased fineness
Unsoundness of cement
Reduced heat of hydration
The Bogue’s compound mainly responsible for ultimate strength of cement is:
C3A
C4AF
C2S
C3S
Which compound has the maximum heat of hydration?
C2S
C4AF
C3S
C3A
In rotary kiln operation, the temperature range of the burning zone is:
800–900°C
1000–1200°C
1400–1500°C
1600–1700°C
The correct order of percentage presence of Bogue’s compounds in OPC is:
C2S > C3S > C4AF > C3A
C3S > C2S > C3A > C4AF
C3A > C4AF > C2S > C3S
C4AF > C3A > C2S > C3S
Which laboratory test determines specific surface area of cement?
Sieve test
Sedimentation test
Air permeability test (Blaine apparatus)
Excess alumina in cement reduces heat of hydration. Choose the correct option.
True
False
Cement achieves about 70% of its final strength in 28 days. Choose the correct option.
True
False
Roman cement is a common variety of ________ cement. Choose the correct option.
Natural
Rapid hardening
Portland pozzolana
Low heat
Excess silica increases strength but prolongs the setting time.
True
False
Alumina acts as a (a) in cement.
C3S is also known as (a) .
C2S is responsible for ________ strength of cement. Choose the correct option.
early
initial
ultimate (progressive)
instant
The end product of burning in a rotary kiln is called (a) .
Loss on ignition of cement should not exceed (a) percent.
