171. The variety of pig iron used for the manufacture of wrought iron, is
A. Bessemerpig
B. Grey or foundrypig
C. White forgepig
D. Mottled pig
C. White forgepig
172. Kaolin is chemically classified as
A. Metamorphicrock
B. Argillaceousrock
C. Calcareous rock
D. Siliceous rock
B. Argillaceousrock
173. Sewer pipes are made of
A. Earthenware
B. Stoneware
C. Refractory clay
D. All the above
B. Stoneware
174. The process of manufacturing steel by heating short lengths of wrought iron bars mixed with charcoal in fire clay crucibles and collecting the molten iron into molds, is known as
A. process
B. Crucible process
C. Bessemer process
D. Open hearth process
B. Crucible process
175. The rock generally used for roofing, is
A. Granite
B. Basalt
C. Slate
D. Pumice
C. Slate
176. The lime which contains mainly calcium oxide and slacks with water is
A. Fatlime
B. Quicklime
C. Poorlime
D. Hydraulic lime
B. Quicklime
177. The standard size of masonry bricks, is
A. 18 cm × 8 cm × 8cm
B. 19 cm × 9 cm × 9cm
C. 20 cm × 10 cm × 10cm
D. 21 cm × 11 cm × 11 cm
B. 19 cm × 9 cm × 9cm
178. The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively
A. 15, 75,10
B. 75, 10,15
C. 10, 15,75
D. 10, 75,15
A. 15, 75,10
179. Knots in timber are
A. Defects caused by crushingfibres
B. Splits radiating from thecentre
C. Speckledstrains
D. Signs of branches cut off
D. Signs of branches cut off
180. Pick up the correct statement from the following:
A. Fibre boards are used for thermal and acousticcontrol
B. Fibre boards are used for light weight standingmembers
C. Fibre boards are obtained by impregnating a resin product onfibres
D. All the above
D. All the above
