RRB JE Mechanical Question Paper 2014 (Set-3) with Answer Key

81) In Bourdon tube

Answer is:

The deflection is proportional to pressure difference

Explanation:

Bourdon gauges are available to cover a large range of pressures. Bourdon gauges are purely mechanical devices utilizing the mechanical deformation of a flattened but bent tube that winds or unwinds depending on the pressure difference between the inside and the outside. The motion is against a spring torque such that a needle attached to the shaft indicates directly the pressure difference.