A. fB/4
B. fB/2
C. 4fB
D. 2fB
Correct Answer: fB/4 ✔
Last Updated: March 10, 2019
Related MCQs
- What is the speed of sound (m/sec) in ordinary water ?
- Which of the following is not an advantage of fluidisation from transfer operation point of view ?
- While starting an axial flow pump, its delivery valve should be kept __________?
- The line traced by a single fluid particle as it moves over a period of time is called __________ line?
- Pumping of a corrosive liquid is generally preferred to be done by a __________ pump, as it can be made of a variety of materials including plastics?
- For laminar flow of Newtonian fluids through a circular pipe, for a given pressure drop and length & diameter of pipe, the velocity of fluid is proportional to (where, μ = fluid viscosity ) ?
- For the same flow rate of a fluid, the pressure drop is the least for __________?
- Discharge from a 24 inch pipe of water at 10 ft/sec will be __________ ft3/sec?
- Rubber latex is an example of __________ fluid?
- Diaphragm pumps are used to transport__________?
- The length of the tube necessary for the boundary layer to reach the centre of the tube and for fully developed flow to be established is called the __________ length?
- With decrease in particle size to be fluidised by a particular fluid, the operating range of fluidisation velocity__________?
- Differential manometer measures the__________?
- __________ pumps are a group of vacuum pumps ?
- The momentum correction factor for the velocity distribution of laminar flow is__________?
- The frictional resistance in laminar flow does not depend on the__________?
- Steady non-uniform flow is exemplified by flow through a/an__________?
- For an incompressible fluid, the bulk modulus of elasticity is__________?
- Pressure drop in a packed bed for laminar flow is given by the __________ equation?
- The line of action of the buoyant force acts through the__________?
- Bernoulli’s equation accounts for the__________?
- A Newtonian fluid is that__________?
- A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpm Head = 8 metres Flow = 1000 litres/minutes. If its speed is halved, the power consumed now will be __________ hp?
- Power number is the ratio of__________?
- A hydraulic press has a ram of 10 cms in diameter and a plunger of 1 cm in diameter. The force required on the plunger to raise a weight of 10 tons on the ram is __________ kg?
- Mach number is defined as the ratio of the local flow velocity to the sonic velocity in the fluid. For what value of Mach number, the gases are considered incompressible ?
- Propeller type centrifugal pumps are most suitable for__________?
- Hydraulic diameter for non-circular ducts is equal to __________ times the area of flow divided by the perimeter?
- Froude number is the ratio of__________?
- A stream line is__________?
- Which of the following is used for pumping crude oil from oil well ?
- The buoyant force acting on a floating body is dependent on the __________?
- Horsepower requirement for given pump capacity depends upon the__________?
- For a given Reynolds number, in a hydraulically smooth pipe, further smoothening __________ the friction factor?
- Disc compensators are provided in large diameter fuel gas carrying pipelines to__________?
- The unit of velocity head is__________?
- The capacity of a centrifugal pump Can be increased by increasing the__________?
- Curve III in the bellow diagram represents a/an__________?
- The main factor on which the behaviour of a mass of fluidised solid depends mainly is the__________?
- Umf is the minimum fluidisation velocity for a bed of particles. An increase in the superficial gas velocity from 2 Umf to 2.5 Umf results in (all velocities are smaller than the entrainment velocity of the particles) no change in the__________?
- What is the unit of kinematic viscosity in SI unit ?
- A rectangular surface 3′ × 4′, has the lower 3 edge horizontal and 6′ below a free oil surface (sp. gr. 0.8). The surface inclination is 300 with the horizontal. The force on one side of the surface is (where, y = specific weight of water) ?
- A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above fluid-particle system (in SI units) is given below: Δ P/L = 375 × 103 VOM + 10.94 × 106 V2 OM (SI units) If water is to be used as the fluidising medium, in actual operation, the above bed has a height = 1 m. What is the porosity of the fluidised bed ?
- In power law, δ = [A (du/dy)2 + B] then the fluid is__________?
- Drag co-efficient for motion of spherical particles in a stationary fluid in the stoke’s law range is__________?
- Terminal velocity is__________?
- In case of a centrifugal pump, the theoretical head developed is dependent on the __________ the impeller?
- In area meter (e.g., Rotameter), with increase in the fluid flow rate, the__________?
- Minimum porosity for fluidisation is__________?
- Isothermal turbulent flow of a fluid results in decrease of its pressure, which depends on the__________?
- Momentum correction factor used in fluid flow problems accounts for the__________?