91. Pick up the correct statement from the following: Method of sawing timber
A. Tangentially to annual rings, is known as a tangential method
B. In four quarters such that each board cuts annual rings at angles not less than 45°, which is known as the quarter sawing method
C. Cut out of quarter logs, parallel to the medullary rays and perpendicular to annual rings, is known as radial sawing
D. All the above
D. All the above
92. Expansion Joints in masonry walls are provided in wall lengths greater than
A. 10 m
B. 20 m
C. 30 m
D. 40 m
D. 40 m
93. Cast steel is manufactured by
A.Cementation process
B. Crucible process
C. Bessemer process
D. Open hearth process
B. Crucible process
94. Based on the following rocks and minerals, select the correct statement, quartz, shale, basalt, granite, marble, gypsum, mica
A. Basalt and marble are the only metamorphic rocks
B. There is no sedimentary rock
C. Granite is the only igneous rock
D. Quartz and mica are
D. Quartz and mica are
95. The foliated structure is very common in
A. Sedimentary rocks
B. Igneous rocks
C.Metamorphic rocks
D. None of these
C.Metamorphic rocks
96. A crosscut saw is used for
A. Cutting soft stones
B. Cutting hardstones
C. Cutting large blocks of stones
D. Dressing stones
B. Cutting hardstones
97. Pick up the correct statement from the following:
A. Catalysts are added to assist and accelerate the hardening of the resin
B. The fillers are inert materials and they impart strength and hardness
C. Fibrous fillers increase thermal resistance
D. All the above
D. All the above
98. A first-class brick when immersed in cold water for 24 hours should not absorb water more than
A.15%
B.20%
C.22%
D.25 %
B.20%
99. The minimum compressive strength of 2nd class bricks should be
A. 75 kg/cm2
B. 90 kg/cm2
C. 100 kg/cm2
D. 120 kg/cm2
A. 75 kg/cm2
100. Which of the following bricks are used for the lining of furnaces?
A. Over-burnt bricks
B. Under-burnt bricks
C. Refractory bricks
D. First-class bricks
C. Refractory bricks
