Highway Engineering
RC-2, MC-2 and SC-2 correspond to

viscosity in decreasing order from RC-2 to SC-2
same viscosity
None of these
viscosity in increasing order from RC-2 to SC-2

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Highway Engineering
Centre line markings are used

to designate traffic lanes
to indicate that overtaking is not permitted
to designate proper lateral placement of vehicles before turning to different directions
in roadways meant for two way traffic

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