581. Duco paints are
A. plastic paints
B. cellulose paints
C. emulsion paints
D. oil paints.

582. Asbestos is
A. corrugated sheet used for roofing
B. an incombustible fife proof material
C. an organic substanice
D. all the above.

583. 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.

584. In paints, the pigment is responsible for
A. durability
B. colour
C. smoothness
D. glassy face

585. The pigment used in paints for corrosive resistance, is
A. white lead
B. ferrous oxide
C. zinc white
D. red lead

586. The material generally not used as extender in paints, is
A. powdered silica
B. gypsum
C. talc
D. zinc white.

587. The commonly used colour pigment in paints, is
A. ambers
B. carbon black
C. iron oxide
D. all the above.

588. While measuring a chain line between two stations A and B intervened by a raised ground
A. vision gets obstructed
B. chaining gets obstructed
C. both vision and chaining get obstructed
D. all the above.

589. Prolongation of chain line across an obstruction in chain surveying, is done by
A. making angular measurements
B. drawing perpendiculars with a chain
C. solution of triangles
D. all the above.

590. In chain surveying tie lines are primarily provided
A. to check the accuracy of the survey
B. to take offsets for detail survey
C. to avoid long offsets from chain lines
D. to increase the number of chain lines.

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