WorksheetsDay 38-Oct 28-worksheet-PWD-Timber&mortar
Total questions: 15
Worksheet time: 11mins
Which wood variety is strong in tension but weak in resisting thrust or shear?
Hardwood
Softwood
Engineered wood
Treated wood
Which filler retains flexibility after hardening, making it suitable for joints that undergo movement?
Mortar
Grout
Caulk
Putty
The maximum bulking of sand generally occurs when moisture content is around:
1–2%
3–4%
5–8%
10–12%
Which sand is used mainly to improve finish rather than strength?
Gravelly sand
Coarse sand
Fine sand
Pit sand
Endogenous trees are mainly fibrous and unsuitable for structural works.
True
False
Bulking of sand decreases again when moisture content exceeds the optimum limit.
True
False
Assertion (A): Seasoning reduces weight and shrinkage of timber. Reason (R): Seasoning replaces bound moisture with free moisture for faster evaporation.
A true, R true, R correct explanation
A true, R true, R not correct explanation
A true, R false
A false, R true
The fungal attack that turns only interior timber into powder while the exterior remains intact is called (a) .
Cracks radiating from bark toward sapwood during drying stresses are known as (a) .
The reddish-yellow tinge caused by poor ventilation in storage is called (a) .
The bulk density of X-ray shielding mortar is:
(a)
Which of the below is added to make mortar fire proof?
Gypsum
Asbestos cement
Powdered glass
Aluminium cement
When a part of the timber is affected by dry rot, the unaffected portion of the timber should be painted with a solution of (a)
Batten is a piece of timber whose thickness and breadth do not exceed (a)
Chir and deodar are examples of hardwoods while oak and sal are examples of softwoods.
