Which pressure measurement device has its construction wherein, a hollow metal tube is bent like a hook and the end is closed, connected to dial indicator? 

Which pressure measurement device has its construction wherein, a hollow metal tube is bent like a hook and the end is closed, connected to dial indicator?  Correct Answer Bourdon tube 

Explanation:

Bourdon Tube:

• 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.

Manometer:

A simple manometer consists of a glass tube having one of its ends connected to a point where pressure is to be measured and another end remains open to the atmosphere. Common types of simple manometers are:

• Piezometer
• U-tube Manometer
• Single Column Manometer

Differential Manometers measure the difference of pressure between two points in a fluid system and cannot measure the actual pressures at any point in the system. It consists of a U-tube, containing a heavy liquid, whose two ends are connected to the points whose difference of pressure is to be measured.

• Upright U-Tube manometer
• Inverted U-tube manometer
• Inclined Differential manometer