LSA Pre request

Which of the following is the basic principle of fluid mechanics?

• a) Momentum principle

• b) Energy equation

• c) Continuity equation

• d) All of the mentioned

Which of the following method is used exclusively in fluid mechanics?

• a) Eulerian method
• b) Lagrangian method
• c) Neither Lagrangian nor Eulerian method
• d) Both Lagrangian and Eulerian methods

The value of coefficient of velocity for a sharp edged orifice __________ with the head of water.

• (A) Decreases
• (B) Increases
• (C) Remain same
• (D) None of these

Stagnation point is the point in fluid mechanics where the velocity of the fluid at that point is _____

• a) unity
• b) constant
• c) infinite
• d) zero

When is the fluid called laminar?

• a) Low viscosity
• b) The density of the fluid is high
• c) Reynolds number is greater than 2000
• d) Reynolds number is less than 2000

The compressible flow is assumed to be _____________

• a) Adiabatic only
• b) Isentropic only
• c) Isentropic and adiabatic
• d) Polytropic

Pressure intensity or force due to pressure gradient for fluid at rest is considered as which of the following kind of force?

• a) Body force
• b) Force due to motion
• c) Surface force
• d) None of the mentioned

Which of the Thermodynamics is used to understand the concept of energy conservation

• Zeroth Law
• First Law
• Second Law
• None of the above

Which Thermodynamics Process is there no flow of heat between the system and the surrounding

• Isobaric
• isochoric
• Adiabatic
• Isothermal

During the opening of a valve in a pipe line, the flow is

• IsothermalA) Steady
• (B) Unsteady
• (C) Uniform
• (D) Laminar