Highway Engineering
When semaphore and warner are installed on the same post, then the stop indication is given when

both semaphore and warner arms lowered
semaphore arm lowered but warner arm horizontal
both arms are horizontal
None of these

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Highway Engineering
For the construction of water bound macadam roads, the correct sequence of operations after spreading coarse aggregates is

dry rolling, wet rolling, application of screening and application of filler
dry rolling, application of screening, application of filler and wet rolling
dry rolling, application of filler, wet rolling and application of screening
dry rolling, application of screening, wet rolling and application of filler

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Highway Engineering
The sequence of four stages of survey in a highway alignment is

map study, preliminary survey, reconnaissance and detailed survey
preliminary survey, map study, reconnaissance and detailed survey
reconnaissance, map study, preliminary survey and detailed survey
map study, reconnaissance, preliminary survey and detailed survey

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Highway Engineering
The provision of traffic signals at intersections

reduces right angled and rear end collisions
increases right angled and rear end collisions
reduces right angled collisions but may increase rear end collisions
reduces rear end collisions but may increase right angled collisions

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