101. Bulking of sand is caused due to
A. Surface moisture
B. Air voids
C. Viscosity
D. Clay contents
A. Surface moisture
102. The normal consistency of ordinary Portland cement is about
A. 10%
B.20%
c. 30%
D. 40 %
c. 30%
103. Lacquer is
A. Oil paint
B. Distemper
C. Spiritvarnish
D. None to these
C. Spiritvarnish
104. Plaster of Paris is obtained by calcining
A. Bauxite
B. Gypsum
C. Limestone
D. None of these
B. Gypsum
105. Pick up the correct statement from the following:
A. The lime in excess makes the cement unsound and causes the cement to expand and disintegrate
B. The silica in excess makes the cement stronger but its setting time also increases
C. The excess amount of alumina weakens the cement
D. All the above
D. All the above
106. Priming consists of
A. One part of white lead, 8 parts of chalk, and four parts of twice boiled linseed oil
B. 8 parts of white lead, one part of chalk, and four parts of twice boiled linseed-oil
C. One part of white lead, 8 parts of chalk, and one part of linseed oil
D. None of these
B. 8 parts of white lead, one part of chalk, and four parts of twice boiled linseed-oil
107. The coefficient of the hardness of stones used in road work should be greater than
A. 10
B. 12
C. 15
D. 17
D. 17
108. Manganese steels
A. Are non-magnetic
B. Possess high electrical resistance
C. Possess low coefficient of expansion
D. All the above
D. All the above
109. The most commonly used base for timber painting is
A. Redhead
B. Zinc white
C. White lead
D. Titanium white
C. White lead
110. Pick up the correct statement from the following:
A. Adding 5% to 6% of moisture content by weight increases the volume of dry sand from 18% to38%
B. The bulking of fine sand is more than that of coarse sand
C. If the percentage content of moisture exceeds 10%, an increase in the bulk of sand starts increasing
D. All the above
D. All the above
