161. Plastic asphalt is
A. Used as a water proofing layer overroof
B. A mixture of cement andasphalt
C. A naturalasphalt
D. A refinery product
B. A mixture of cement andasphalt
162. Pick up the correct statement from the following:
A. During rusting, first ferrous bicarbonates areformed
B. Rusting is caused due to combined action of air, moisture, and carbondioxide
C. On further oxidation ferrous bicarbonates get converted to ferricbicarbonates
D. All the above
D. All the above
163. The commonly used base for iron and steel work is
A. Redlead
B. Zincwhite
C. White lead
D. Titanium white
A. Redlead
163. For high-grade instruments the steel preferred, is
A. Cast steel
B. Bessemer steel
C. Mildsteel
D. Whitworth compressed steel
A. Caststeel
164. Bitumen felt is used for
A. Waterproofing
B. Dampproofing
C. Both (A) and(B)
D. Neither (A) nor (B)
C. Both (A) and(B)
165. The most important constituent of an oil paint, is
A. Thinner
B. Vehicle
C. Pigment
D. All the above
D. All the above
166. Acrylic sheets
A. Possess 10 to 17 times greater breakage resistance than that of glass of equivalent thickness
B. Are generally unaffected by most householddetergents
C. Possess the light transmission rate of93%
D. All the above
D. All the above
167. Brass is an alloy of
A. Copper and zinc
B. Zinc andlead
C. Tin andsilver
D. Zinc and nickel
A. Copper and zinc
168. Pick up the polymineralic rock from the following:
A. Quartzsand
B. Pure gypsum
C. Magnesite
D. Granite
D. Granite
169. The lime which contains a high percentage of calcium oxide is generally called
A. Fatlime
B. Rich lime
C. White lime
D. None of these
D. None of these
170. Wrought iron contains carbon up to
A. 0.25 %
B 1.0%
C 1.5%
D 2 %
