INTRODUCTION TO FLUID MECHANICS 6 TH EDITION JANNA ACTUAL EXAM TEST PAPER
FULL QUESTIONS CORRECT RESPONSES
⩥ Statics. Answer: The branch of mechanics that deals with bodies at
rest (u = 0).
⩥ Dynamics. Answer: The branch that deals with bodies in motion (u ≠
0).
⩥ Fluid dynamics. Answer: Fluid mechanics is also referred to as fluid
dynamics by considering fluids at rest as a special case of motion with
zero velocity.
⩥ Hydrodynamics. Answer: The study of the motion of fluids that can be
approximated as incompressible (such as liquids, especially water, and
gases at low speeds).
⩥ Hydraulics. Answer: A subcategory of hydrodynamics, which deals
with liquid flows in pipes and open channels.
, ⩥ Gas dynamics. Answer: Deals with the flow of fluids that undergo
significant density changes, such as the flow of gases through nozzles at
high speeds.
⩥ Aerodynamics. Answer: Deals with the flow of gases (especially air)
over bodies such as aircraft, rockets, and automobiles at high or low
speeds.
⩥ Fluid. Answer: A substance in the liquid or gas phase that deforms
continuously when subjected to a shear stress.
⩥ No slip condition. Answer: No relative motion between fluid and
boundary, i.e., fluid in contact with lower plate is stationary, whereas
fluid in contact with upper plate moves at speed U.
⩥ Stress. Answer: Force per unit area.
⩥ Normal stress (σ). Answer: The normal component of a force acting
on a surface per unit area.
⩥ Shear stress (τ). Answer: The tangential component of a force acting
on a surface per unit area.
⩥ Pressure. Answer: The normal stress in a fluid at rest.
FULL QUESTIONS CORRECT RESPONSES
⩥ Statics. Answer: The branch of mechanics that deals with bodies at
rest (u = 0).
⩥ Dynamics. Answer: The branch that deals with bodies in motion (u ≠
0).
⩥ Fluid dynamics. Answer: Fluid mechanics is also referred to as fluid
dynamics by considering fluids at rest as a special case of motion with
zero velocity.
⩥ Hydrodynamics. Answer: The study of the motion of fluids that can be
approximated as incompressible (such as liquids, especially water, and
gases at low speeds).
⩥ Hydraulics. Answer: A subcategory of hydrodynamics, which deals
with liquid flows in pipes and open channels.
, ⩥ Gas dynamics. Answer: Deals with the flow of fluids that undergo
significant density changes, such as the flow of gases through nozzles at
high speeds.
⩥ Aerodynamics. Answer: Deals with the flow of gases (especially air)
over bodies such as aircraft, rockets, and automobiles at high or low
speeds.
⩥ Fluid. Answer: A substance in the liquid or gas phase that deforms
continuously when subjected to a shear stress.
⩥ No slip condition. Answer: No relative motion between fluid and
boundary, i.e., fluid in contact with lower plate is stationary, whereas
fluid in contact with upper plate moves at speed U.
⩥ Stress. Answer: Force per unit area.
⩥ Normal stress (σ). Answer: The normal component of a force acting
on a surface per unit area.
⩥ Shear stress (τ). Answer: The tangential component of a force acting
on a surface per unit area.
⩥ Pressure. Answer: The normal stress in a fluid at rest.
