ISRO Technician-B Machinist Question Paper - 2016 (Set -1) with Answer Key

According to Pascal’s law, the intensity of pressure at any point in a fluid at rest is same in all directions.
Modern hydraulic systems are based on Pascal's law.

Strain is the deformation of a material from stress. Strain is simply a ratio of the change in length to the original length. Deformations that are applied perpendicular to the cross section are normal strains, while deformations applied parallel to the cross section are shear strains.
There is no unit for strain.