Q. 11 The type of steel used for precision levelling staff, is
A. Carbon steel
B. Invar
C. Titanium steel
D. Stainless steel
B. Invar
Q. 12 Formula for quick lime, is
A. Ca(OH)2
B. CO3CO2
C. CaCO3
D. None to these
C. CaCO3
Q. 13 The process of decarbonising the pig iron completely and then adding proper percentage of carbon for manufacturing steel, is called
A. Crucible process
B. Bessemer process
C. Cementation process
D. Open hearth process
C. Cementation process
Q. 14 The maximum quantity of calcium chloride used as an accelerator in cement in percentage by weight of cement is
A. 1
B. 2
C. 4
D. 4
B. 2
Q. 15 The portion of a brick cut to form angles other than right angles in plan, is known as
A. Queen closer
B. Closer
C. King closer
D. Squint brick
D. Squint brick
Q. 16 The moisture content in a well seasoned timber is
A. 15 % to 20 %
B. 100 %
C. 4 % to 6 %
D. 10 % to 12 %
D. 10 % to 12 %
Q. 17 The cement becomes unsound by the presence of excess
A. Magnesia
B. Lime
C. Sulphur
D. All of these
D. All of these
Q. 18 For one cubic metre of brick masonry, number of bricks required, is
A. 400
B. 425
C. 450
D. 500
D. 500
Q. 19 Which one of the following polymers is obtained from condensation polymerization?
A. Carbamide
B. Melamine-formaldehyde
C. Phenol formaldehyde
D. All of these
D. All of these
Q. 20 Rapid hardening cement contains
A. Tetra-calcium alumino-ferrite
B. Di-calcium silicate
C. Tri-calcium silicate
D. Tri-calcium aluminate
C. Tri-calcium silicate
