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

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

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

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