141. For the design of cement concrete pavement for corner loading, Indian Road Congress recommends the use of
A. Westergard's formula
B. Kelly's formula
C. Goldbeck's formula
D. Picker's formula.
142. If d is the economic designed depth of a slab, the thickness of the cement concrete pavement slab at interior, is kept
A. 1.275 d
B. 1.125 d
C. 0.85 d
D. 0.75 d
143. Reinforcement in cement concrete slab of road pavements, is placed
A. longitudinally
B. transversely
C. longitudinally and transversely
D. in the form of welded wire mesh
144. Depth of reinforcement below the surface of a concrete pavement, is generally kept
A. 5 cm
B. 6 cm
C. 7 cm
D. 8 cm
145. In welded wire mesh, the longitudinal wire is placed at
A. 10 cm centres
B. 15 cm centres
C. 20 cm centres
D. 25 cm centres
146. To prevent compressive stresses in a rigid concrete pavement, the joint prvoided, is
A. expansion joint
B. contraction joint
C. hinged joint
D. all the above.
147. If the width of a pavement slab is 7.5 m, thickness 20 cm and working stress 1400 kg/crn2, spacing of 10 mm tie bars for the longitudinal joint, is
A. 10 cm
B. 20 cm
C. 30 cm
D. 40 cm
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