CBA Assessment
Authored by gloria makokha
Engineering
12th Grade
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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of the following is the main ingredient in Portland cement?
Gypsum
Lime
Clay
Silica
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
The initial setting time of ordinary Portland cement is approximately:
15 minutes
30 minutes
45 minutes
60 minutes
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
The process of hardening of concrete is known as:
Hydration
Setting
Curing
Mixing
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Bricks are classified as first class if their compressive strength is not less than:
3.5 N/mm²
5.0 N/mm²
7.0 N/mm²
10.0 N/mm²
5.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
The maximum temperature used in the kiln for manufacturing cement is about (a) °C.
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of the following is a metamorphic rock?
A) Granite
Basalt
Marble
Limestone
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
The fire resistance of concrete is mainly due to:
Its density
Its thermal conductivity
Its moisture content
Its non-combustibility
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