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WorksheetsCivil war-Day 37-PWD-Timber & mortar
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
Due to the attack of dry rot, the timber
a)
Shrinks
b)
Swells
c)
Cracks
d)
reduces to powder
2.
The innermost part of a tree is called
a)
Heart wood
b)
Cambium layer
c)
Sap wood
d)
Medulla
3.
Timber piece with parallel sides whose thickness is less than 50 mm and width exceeds 150 mm
a)
Batten
b)
Deal
c)
Plank
d)
Board
4.
Crack which separates fibres of wood and extend from one end to other
a)
Collapse
b)
Check
c)
Spilt
d)
Radial shake
5.
Pick out the wrong statement about wet rot
a)
Occurs due to alternate drying and wetting
b)
Not result chemical decomposition of wood
c)
Greyish brown powder is formed
d)
Tar or paint is applied on well seasoned timber to prevent wet rot
6.
In case of gauged mortar the usual proportion of cement to lime by volume is about
a)
1: 3 to 1:8
b)
1:2 to1:6
c)
1:6 to 1:8
d)
1:3 to 1:6
7.
Method which is used for the production of lime mortar in small scale
a)
Grinding
b)
Pounding
c)
Kneading
d)
pug mill
8.
How is particle size of sand related to bulking?
a)
Not related
b)
Inversely proportional
c)
Directly proportional
d)
Shows variable relation
9.
Which of the following mortars is most suitable for construction work in water-logged areas?
a)
Lime mortar
b)
Gauged mortar
c)
Cement mortar
d)
Mud mortar
10.
A gauged mortar is obtained by adding which of the following ingredients to cement?
a)
Sand stone
b)
Sand and surkhi
c)
Sand and lime
d)
Surkhi alone
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