134. Asbestos is
A. corrugated sheet used for roofing
B. an incombustible fife proof material
C. an organic substanice
D. all the above.
135. Fibre glass
A. retains heat-longer
B. has a higher strength to weight ratio
C. is shock proof and fire retardant
D. all the above.
136. Dry rot
A. cracks the timber
B. reduces the strength of timber
C. reduces the timber to powder
D. shrinks the timber
137. In paints, the pigment is responsible for
A. durability
B. colour
C. smoothness
D. glassy face
138. The pigment used in paints for corrosive resistance, is
A. white lead
B. ferrous oxide
C. zinc white
D. red lead
139. The material generally not used as extender in paints, is
A. powdered silica
B. gypsum
C. talc
D. zinc white.
140. The commonly used colour pigment in paints, is
A. ambers
B. carbon black
C. iron oxide
D. all the above.
Page 20 of 51