0% 0 Fluid Mechanics for Chemical Quiz 10 1 / 50 The dimension of kinematic viscosity is__________? None of these ML-2T-1 L2T-1 ML-2T-2 2 / 50 The co-efficient of discharge of an orificemeter is a function of _________? Reynolds number at the orifice Both A. and B. None of the above parameters, and has a constant value of 0.61 Ratio of orifice dia to pipe dia 3 / 50 The energy equation, E + (p/?) + (V2/2g) + gZ = constant (E = internal energy/mass), is applicable to_____? All compressible fluids Perfect gases only Isothermal flow of gases Adiabatic unsteady flow of gases 4 / 50 The flow of a liquid through tapering pipe at a constant rate is an example of ________ flow? Steady non uniform Unsteady uniform Unsteady non uniform Steady uniform 5 / 50 The boundary layer is that part of a moving fluid, in which the fluid velocity is__________? Constant All A., B. and C. Affected by the fluid flow pressure Affected by the presence of a solid boundary 6 / 50 The capillary rise of mercury is maximum in glass tube of dia ______ mm? 0.5 5 2 1 7 / 50 Stoke?s equation is valid in the Reynolds number range___________? 10 to 100 2 to 10 0.01 to 0.1 0.1 to 2 8 / 50 The equivalent diameter for flow through a rectangular duct of width B and height H is_____? 2HB/(H + B) 4HB/(H + B) HB/(H + B) HB/2 (H + B) 9 / 50 The boundary layer thickness at a given section along a flat plate ______ with increasing Reynold?s number? Increases Decreases Remain same May increase or decrease 10 / 50 The dimension of surface tension is_________? MT-2 MLT-2 ML-2T ML-2 11 / 50 The blades of a centrifugal impeller are said to be curved forward, if the _____ of the motion of impeller blades? Inlet tip of a blade is towards the direction Outlet tip of a blade curves in a direction opposite to that Outlet tip of a blade is towards the direction Inlet tip of a blade curves in a direction opposite to that 12 / 50 The equivalent diameter for pressure drop calculation for a fluid flowing through a rectangular cross-section channels having sides ?x? & ?y? is given by__________? (x + y)/xy 2xy/(x + y) (x + y)/2xy xy/(x + y) 13 / 50 The distance between metacentre and _______ is called metacentric height? Centre of buoyancy Water surface None of these Centre of gravity 14 / 50 The dimension of dynamic viscosity is___________? ML-1T-2 LT-2 L2T-1 ML-1T-1 15 / 50 The capacity of an accumulator is the maximum__________? Discharge which it can deliver Liquid which it can store Energy which it can store None of these 16 / 50 The effect of solid boundary on the fluid flow is confined to the boundary layer, except for fluids ? Neither A. nor B. Both A. & B. Moving at low velocities Having high viscosities 17 / 50 The equation relating friction factor to Reynold number, f-0.5 = 4 loge (NRe/?f)-0.4, is called the ______ equation? Von-Karman Blasius Colebrook Nikuradse 18 / 50 The exit cone angle in case of a standard Venturimeter is ______ the entrance cone angle? Equal to Either A. or B. Greater than Smaller than 19 / 50 Terminal velocity is_______? A constant velocity with no acceleration Attained after moving one-half of total distance A fluctuating velocity None of these 20 / 50 The centre of pressure is__________? Always below the centroid of the area Always above the centroid of the area A point on the line of action of the resultant force At the centroid of the submerged area 21 / 50 The discharge through a semi-circular weir varies as (where, H = Head of liquid.) ? H3/2 H1/2 H H2 22 / 50 The energy loss over a length of pipeline according to Darcy-Weisbach equation for pipe flow is ________ the mean velocity of flow? Directly proportional to Inversely proportional to Inversely proportional to square of Directly proportional to square of 23 / 50 The continuity equation___________? None of these Relates work and energy Relates mass flow rate along a stream tube Stipulates that Newton?s second law of motion must be satisfied at every point in the fluid 24 / 50 The energy loss in flow through Venturimeter is less than that through flow nozzle, because in case of a flow nozzle, the ? Length is shorter Distance between the throat and the inlet is more Sudden expansion of flow in the downstream occurs Throat diameter is more 25 / 50 The curve of metacentre for a floating body _____ the curve of buoyancy? Is the evolute of Is tangential to Is always below Intersects at right angle 26 / 50 Surge tanks are provided in high pressure water pipelines to_____? Facilitate easy dismantling of pipeline for cleaning and maintenance Store a definite quantity of water all the time Reduce the water hammer None of these 27 / 50 The continuity equation of fluid mechanics utilises the principle of conservation of __________? Momentum Mass Energy Both B. & C. 28 / 50 The discharge through a Venturimeter depends upon __________? Pressure drop only Its orientation Co-efficient of contraction only None of these 29 / 50 The buoyant force acting on a floating body is dependent on the ________? Weight of the liquid displaced Viscosity of the liquid Depth of immersion of the body Surface tension of the liquid 30 / 50 The equation f-0.5 = 4.07 loge (NRe ?f)-0.6 is called the _____? Colebrook formula Von-Karman equation None of these Fanning equation 31 / 50 The discharge co-efficient for an orifice meter does not depend upon the _____? Ratio of pipe diameter to orifice diameter Type of orifice & the Reynolds number Pipe diameter Pipe length 32 / 50 Stoke?s law is valid, when NRe, p is less than__________? 700 100 2100 2 33 / 50 The actual velocity at vena-contracta for flow through an orifice from a reservoir is given by_______? Cd . ?(2gH) Cv . Va Cv . ?(2gH) Cc . ?(2gH) 34 / 50 Stoke?s law is valid, when the particle Reynolds number is ________? < 5 < 1 > 1 None of these 35 / 50 The excess of the sum of pressure & velocity heads over the vapor pressure of the liquid at the suction is called the_____? Priming Static submergence Net positive suction head (NPSH) Cavitation sensitivity 36 / 50 The contraction co-efficient for Borda?s mouthpiece (for frictionless fluid) is___________? 0.94 0.5 1 0.1 37 / 50 The discharge through a V-notch weir varies as_____? H2/3 H1/2 H3/2 H5/2 38 / 50 The bulk modulus of elasticity of a liquid___________? Is zero for incompressible liquid Decreases with pressure Increases with pressure Is independent of temperature & pressure 39 / 50 The distribution of shear stress in a stream of fluid in a circular tube is_______? Linear with radius for both laminar & turbulent flow Linear with radius for turbulent flow only Parabolic with radius for both laminar & turbulent flow Linear with radius for laminar flow only 40 / 50 The co-efficient of drag and lift for an incompressible fluid depends on the__________? All A., B. and C. Reynolds number Mach number Froude number 41 / 50 The continuity equation_____? None of these Is dependent upon the viscosity of the fluid Is independent of the compressibility of the fluid Represents the conservation of mass 42 / 50 The drag co-efficient for a bacterium moving in water at 1 mm/s, will be of the following order of magnitude (assume size of the bacterium to be 1 micron and kinematic viscosity of water to be 10-6m2/s) ? 0.24 24000 24 0.44 43 / 50 The equivalent diameter for pressure drop calculation for a duct of square cross-section is given by (where, x = each side of the square duct) ? x ?(x/2) ?(?x) ?(2x) 44 / 50 The continuity equation in ideal fluid flow states that___________? Energy is constant along a streamline Energy is not constant along a streamline There exists a velocity potential Net rate of inflow into any small volume must be zero 45 / 50 The equivalent diameter for fluid flow through square cross section channel of side ?x?, for pressure drop calculation purpose is given by______? x ?x 4x 2x 46 / 50 The component of acceleration resulting due to unsteady nature of flow is called _____ acceleration? Convective Normal Local Tangential 47 / 50 The capacity of a centrifugal pump Can be increased by increasing the__________? Number of pumps and joining them in parallel All A., B. and C. Number of pumps and joining them in series Impeller diameter or speed 48 / 50 The discharge through a rectangular weir varies as _____? H2/5 H3/2 H5/2 H1/2 49 / 50 The _____ is measured by a piezometric opening? Dynamic pressure Total pressure Point velocity Static pressure 50 / 50 The _______ pressure is measured by a static tube? None of these Total Static Dynamic Provide Your Information Your score is The average score is 0% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevFluid Mechanics for Chemical Quiz 9 Fluid Mechanics for Chemical Quiz 12Next
