WorksheetsCivilwar-16/12/25-Overseer Grade 2&3+Grade 1-Stones part 3&4
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
What is the primary purpose of the Crushing Test on stones?
a)
To determine the hardness of stones
b)
To determine the compressive strength of stones
c)
To assess the water absorption of stones
d)
To detect soluble impurities in stones
2.
Which of the following is considered a good building stone in terms of compressive strength?
a)
Granite
b)
Marble
c)
Sandstone
d)
Basalt
3.
What is the main purpose of the Crystallisation Test on stones?
a)
To test the stone’s ability to absorb water
b)
To determine the durability of the stone against salt deposition
c)
To assess the compressive strength of the stone
d)
To check the hardness of the stone
4.
Which of the following stones has a hardness less than 14, indicating poor quality for construction?
a)
Basalt
b)
Granite
c)
Limestone
d)
None
5.
What is the maximum water absorption percentage allowed for good building stone?
a)
10%
b)
5%
c)
15%
d)
1%
6.
Assertion: The natural bed of a stone must be perpendicular to the load applied in stone masonry.
Reason: If the load acts parallel to the natural bed, the stone may split or delaminate.
a)
Both Assertion and Reason are correct, and Reason is the correct explanation for Assertion
b)
Both Assertion and Reason are correct, but Reason is not the correct explanation for Assertion
c)
Assertion is correct, but Reason is incorrect
d)
Assertion & Reason are incorrect
7.
Which type of explosive is commonly used in quarrying to lift large blocks of stone?
a)
Dynamite
b)
Blasting Powder
c)
Gelignite
d)
Cordite
8.
Which stone is classified as “acidic” in the geological classification of rocks due to its high silica content?
a)
Gabbro
b)
Granite
c)
Basalt
d)
Syenite
9.
What does the term “quarry sap” refer to in stone quarrying?
a)
The natural moisture present in freshly quarried stones
b)
The dust produced during quarrying
c)
The soluble impurities in stone
d)
The hardened outer layer of stone
10.
What is the main function of a “tamping bar” in blasting operations?
a)
To drill holes in rocks
b)
To remove dust from drill holes
c)
To ram explosives and ensure proper packing
d)
To create vertical blasting holes
100 %
