54) Carbondioxide in atmospheric air amounts to about

Answer is:

0.03%

RRB JE Mechanical Question Paper 2014 (Set-2) with Answers

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55) The capacity of the battery is given in terms of

Answer is:

Ampere hour

56) Flow in a pipe is laminar, if the Reynold's number is

Answer is:

Less than 2000

Explanation:

The ratio of the inertia force to the viscous force is called Reynold’s Number. The flow in a pipe is laminar when Reynold’s number is less than 2000 and flow is turbulent when Reynold’s number is more than 2800. But when Reynold’s number is between 2000 and 2800, the flow is neither laminar nor turbulent.