1011. Poise is converted into stoke by :
A. Multiplying with density (gm/c.c)
B. Dividing by density (gm/cc) *
C. Multiplying with specific gravity
D. Dividing by specific gravity
1012. With increase in the temperature , viscosity of a liquid :
A. Increases
B. Decreases *
C. Remains constant
D. May either go up or down; relies upon the fluid
1013. For water , when he pressure increases the viscosity :
A. Also increases
B. Decreases
C. Remains constant
D. First decreases and then increases *
1014. The pressure Intensity is the same in all directions at a point in a fluid :
A. Only when the fluid is frictionless
B. Only when the fluid has zero velocity at rest
C. At the point when there is no movement of one liquid layer comparative with a neighboring layer *
D. Regardless of how one fluid layer moves relative to another,
1015. As a rigid body rotating at a constant angular velocity, a fluid’s pressure intensity changes as follows:
A. Square of the radial distance *
B. Radial distance linearly
C. Inverse of the radial distance
D. Elevation along vertical direction
1016. A 3′ x 4′ rectangular surface has a lower edge angle of 3′ that is horizontal and is 6′ below a free oil surface (sp.gr.0.8). The surface is 300 degrees inclined with the horizontal. On one side of the surface, the force is:
A. 39.6y
B. 48y *
C. 49.2y
D. 58y
1017. A stream tube is what has ______ cross segment completely limited by smoothes out :
A. A circular
B. Any convenient *
C. A small
D. A large
1018. Mass velocity is independent of temperature and pressure when the flow is :
A. Unsteady through unchanged cross section
B. Steady through changing cross section
C. Stable, with no change to the cross section;*
D. Unsteady, with a change to the cross section
1019. In turbulent flow :
A. The fluid Particles move in an orderly manner
B. Momentum transfer only occurs at the molecular scale.
C. Cohesion causes shear stress more effectively than momentum transfer does.
D. Shear stresses are typically higher than in a similar flow *
1020. Turbulent flow generally occurs for cases involving :
A. Highly viscous fluid
B. Very narrow passages
C. Very slow motion
D. None of these *