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Laporan Praktikum Jaringan Komputer DTETI UGM Unit 2

Gateway 2

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The motion of fluid particle may be described b y which of the following method A) lagrengian method B) eulerian method C) both a and b D) none of the above On which of the following method the observer concentrates on a points po ints in the fluid system A) lagrengian method B) eulerian method C) any of the above D) none of the above Normal acceleration in fluid flow situation exist only when A) the flow is unsteady B) the flow is two dimensional C) the stream lines are straight and parallel D) the stream lines are curved In a steady flow the velocity A) does not change from place to place B) at a given point does not change with time C) may change its direction but the magnitude remain unchanged D) none of the above The flow in a pipe whose value is being opened or closed gradually in a example of A) steady flow B) unsteady flow C) rotational flow D) compressible flow The type of flow in which the velocity at any given time dose not changed with respect to is called A) steady flow B) compressible flow C) uniform flow D) rotational flow Flow in a pipe where average from from flow parameters are considered for analysis is an example of rotational flow in A)two dimensional flow B) incompressible flow C) one dimensional flow D) three dimensional flow The flow in river during the period of heavy rain fall is A) steady, non uniform and three dimensional B) steady, uniform and two dimensional C) unsteady uniform and three dimensional D) unsteady non uniform and three dimensional Flow between parallel plates of infinite infinite extent is an example of

A) one dimensional flow B) two dimensional flow C) three dimensional flow D) compressible flow 10. If the flow is irrotational and steady is known as A) non uniform flow B) one dimensional flow C) potential flow D) none of the above 11. High velocity flow in conduit of large size known as A) laminar flow B) turbulent flow C) either of the above D) none of the above 12. If the reynolds number is more than 2000 the flow in pipe is A) laminar flow B) turbulent flow C) transitional flow D) none of the above 13. The path flowed by fluid particle in motion is called as A) steam line B) path line C) streak line D) none of the above 14. A-----is an imaginary line within the flow so that the tangent at an y point ion it indicates the velocity at point A) steam line B) path line C) streak line D) none of the above 15. Stream line is one A) in which stream function does not change B) in which the flow cannot cross the bounding surface C) which has constant area throughout its len gth so that velocity remains constant D) none of the above 16. ------is a curve which gives an instantaneous picture of location of fluid particle which have passed through a given point A) steam line B) path line C) streak line D) none of the above 17. In fluid mechanics the continuity equation is a mathematical statement embodying principle of

A) conservation of momentum B) conservation of mass C) conservation of energy D) none of the above 18. An irrorotation flow is one in which A) the stream line of flow are curved and closely spaced B) the fluid dose not rotate as it moves along C) the net rotation of fluid particles about their mass center remains zero D) none of the above 19. In a fluid flow the steam lines are lines A) along which the vorticity is zero B) along which the stream function ψ = constant C) which are parallel two the equipotential lines D) which exist in irrotational flow only 20. ----is defined mathematically as the line integral of tangential velocity about closed path A) circulation B) vorticity C) either of the above D) none of the above 21. The concept of stream function which is based on the principle of continuity is app licable to A) irrotational flow only B) two dimensional flow only C) three dimensional only D) uniform flow only 22. The motion is described as ------when the components of rotation or velocity are zero throughout certain point of the fluid A) rotational B) irrotational C) either of the above D) none of the above 23. ----is defined as scalar function of the space and time such that its negative derivative the respective to any direction gives the fluid velocity in that direction A) velocity potential function B) stream function C) circulation D) vorticity 24. If the velocity potential (ө ) satisfy the laplace equation it represents the possible---- flow A) unsteady, compressible, rotational B) steady, incompressible, irrotational C) unsteady, incompressible, rotational D) steady, incompressible, irrotational 25. A flow net and graphical representation of streamline and equipotential line such that the lines

A) intersect each other orthogonally forming curvilinear squares B) intersect each other at various different angles forming irregular – shaped nets C) indicate direction and magnitude of vectors D) none of the above 26. The flow net analysis can be used to determine A) the stream lines and equipotential lines B) quantity of seepage and upward lift pressure below hydraulic structures C) the efficient boundary shapes for which the flow dose not separate D) the velocity and pressure distribution for given boundaries of a flow (provided the velocity distribution and pressure at any reference section are known) E) all of the above 27. In fluid kinematics--------A) velocity and acceleration at point are studied B) pressure distribution of fluid can be found C) forces acting on fluid can be found D) all of the above 28. Velocity is function of ----A) space B) time C) space and time D) none of the above 29. If v is velocity vector at any point p(x,y) tangential to steam line and u and v are component of v along x and y direction then--------A) tanө= u/v B) tanө=v/u C) tanө= u*v D) tanө= u+v 30. For three dimensional flow equation of streamline will be

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31. The component of velocity at right angle to stream line is-------A) u B) v C) w D) o 32. Stream tube is bounded by stream line hence velocity has no component ---------to the stream line A) parellel B) normal

C) a and b D) none of the above 33. if at any point in flowing fluid various characteristic(velocity, pressure do not change with respect to time is called------------ flow A) unsteady B) uniform C) rotational D) steady 34. For steady flow-------------=0 A) B) C)

D) all of the above 35. When the various fluid particle moves in layers with one layer sliding over another layer the flow is called as---------flow A) turbulent B) steady C) laminar D) compressible 36. ----is an example of laminar flow A) flow of oil in bearing B) flow of blood in veins C) flow of liquid in porous medium D) all of the above 37. Smok from chimney, smok from silencer of behicle flow in natural stream are example of ------flow A) turbulent B) steady C) laminar D) rotational 38. Reynolds number is--------A) inertia force/viscous force

B) C)

D) all of the above 39. If 2000< Re< 4000 the flow is -------A) steady B) laminar C) turbulent

D) transitional 40. Flow in open channel is example of------A) two dimensional B) three dimensional C) one dimensional D) all of the above 41. The mass of fluid flowing through the section of pipe per unit time is A) A*V B) ℓ* A*V C) ℓ *V D) none of the above 42. Discharge is given by--------A) ℓ* A*V B) ℓ *V C) ℓ* A D) A*V