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.Management Sciences
Category: Building Materials and Construction
Sapwood consists of______________?
A. innermost annular rings around the pith
B. portion of timber between heartwood and cambium layer
C. thin layers below the bark
D. thin fibre which extends from the pith outwards and holds the annular rings together
The ultimate tensile strength of structural mild steel is about_________________?
A. 160N/mm2
B. 260N/mm2
C. 420 N/mm2
D. 520 N/mm2
Crushing strength of a good building stone should be more than____________?
A. 50 MPa
B. 100 MPa
C. 150 MPa
D. 200 MPa
The main constituent of cement which is responsible for initial setting of cement is_________________?
A. dicalcium silicate
B. tricalcium silicate
C. tricalcium aluminate
D. all of the above
Which of the following is the purest form of iron ?
A. cast iron
B. wrought iron
C. mild steel
D. high carbon steel
The main function of alumina in brick earth is_______________?
A. to impart plasticity
B. to make the brick durable
C. to prevent shrinkage
D. to make the brick impermeable
A queen closer is a______________?
A. brick laid with its length parallel to the face or direction of wall
B. brick laid with its breadth parallel to the face or direction of wall
C. brick having the same length and depth as the other bricks but half the breadth
D. brick with half the width at one end and full width at the other
Which of the following ingredients of the brick earth enables the brick to retain its shape ?
A. alumina
B. silica
C. iron
D. magnesia
Sandstone is a ________________?
i. sedimentary rock
ii. aqueous rock
iii. silicious rock
The correct answer is:
A. only (i)
B. both (i) and (ii)
C. both (i) and (iii)
D. all (i), (ii) and (iii)
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