Unit Operations - Fluid Mechanics

The power loss due to friction in a venturi meter is greater than in an orifice meter

Which of the following is true

none of these

Turbulent flow generally occurs for cases involving

1/32

When the ID of the pipe through which a fluid flows is doubled, the pressure loss due to friction per unit length of pipe and for the same volumetric flow rate is changed by approximately a factor of

1

When two centrifugal pumps are connected in series, the discharge changes by factor of

2

When two reciprocating pumps are connected in parallel, the volumetric capacity of the system changes by a factor of

4

The pressure drop in a pipeline changes by a factor of ____ when the velocity of the flowing liquid is doubled

Motors

Machines which need electricity to run are

suction is lost

Cavitation occurs in a centrifugal pump when

2.0

When the impeller speed of an ideal centrifugal pump is doubled, the volumetric flow rate of the discharge is increased by a factor of

potential head

The differential height between two points where a fluid has to be transferred is the

schedule number

The bursting pressure of a pipe is directly proportional to its

manometer

A device for measuring differential pressure is a

Reynolds number

the dimensionless number that characterizes the flow of fluids in a conduit is

more than

When a fluid flows through a reducer in a piping system, the velocity at the outlet end is ______ the velocity at the inlet

the orifice flow area is decreased

At a given flow area rate through an orifice meter the differential pressure across the orifice will increase when

fluid momentum

The prime mover of a jet pump is a/an

mean mass velocity of the stream

The weight rate of flow of a fluid stream per unit of cross section perpendicular to the direction of flow is the

volumetric efficiency

In a reciprocating pump, the ratio of the quantity of liquid actually pumped to that which corresponds to the piston displacement is called

thickness

The schedule number of the pipe is an indicator of the pipe's

strength

The higher the BWG rating of a tube is, the lower is the

streamline

The inside surface of a pipe has no effect on the friction factor when the flow is

blower

When the movement of a gas vapor is effected at a low pressure say, up to 0.1 kg/cm^2, the equipment used is a

Viscosity

the resistance of a layer of fluid to flow over the next layer is measured by

flanged

In a high pressure piping system where joints are regularly broken for maintenance, ____________ joints are used

blower

Air is to be delivered at a rate of 200 cfm and a pressure of 10 kPa. The appropriate equipment to use is

axial flow pump

What type of pump would you recommend if the capacity is 5000 gal/min at a head of 15 ft of water

8

If the speed of a centrifugal pump is doubled, the energy requirement becomes approximately ________ times the original energy requirement

volume

When two bodies lost the same amount of weight when immersed in a fluid, it means that the two bodies have the same