Momentum Transfer

Question 1

When momentum if one fluid is used to move another fluid, such device us called

Answer 1

Jet pump

Question 2

Head developed by centrifugal pump depends on

Answer 2

Speed and impeller diameter

Question 3

Most commonly used joint in underground piping

Answer 3

sleevejoint

Question 4

Schedule number of a Pipe

Answer 4

1000 P/S

Question 5

Increasing flowrate, hydraulic efficiency …

Answer 5

monotonically decreases

Question 6

Water hammer in a pipeline results from

Answer 6

rapid pressure change due to rapid change in the rate of flow

Question 7

If the discharge of a centrifugal pump is throttled, the suction lift …

a. increases
b. decreases
c. same

Answer 7

increases

Question 8

Foot valve in pumps is for

Answer 8

directional control

Question 9

Nominal range if exit cone angle of a venturi meter

Answer 9

7 to 15

Question 10

Ratio of the depth of flow to the hydraulic radius for the most economical trapezoidal section, in open channel flow is

Answer 10

2

Question 11

For laminar flow through a packed bed, the pressure drop is proportional to

Answer 11

Vs/Dp^2

Question 12

Maximum delivery pressure of compressors

Answer 12

1000 atm

Question 13

Coefficient of velocity is ____ the coefficient of discharge

a. equal
b. less than
c. more than

Answer 13

more than

Question 14

Pump for thick slurry

Answer 14

Diaghragm

Question 15

Brownian movement is prominent in the size range of ____ microns in case if settling of a particle in fluid

Answer 15

2-3

Question 16

Shear stress in a fluid flowing in a round pipe

Answer 16

is zero at the center and varies linearly with radius

Question 17

Resistance wire used in a hot wire anemometer for conducting electrical current is made of what element

Answer 17

Tungsten

Question 18

Draining if shallow pits or sump is done by a sump pump which us a

Answer 18

single stage vertical pump

Question 19

Hydraulic ram acts as ___ pump

Answer 19

impulse

Question 19

Hydraulic ram acts as ___ pump

Answer 19

impulse

Question 20

v ave/v max for laminar flow

Answer 20

0.5

Question 21

Pressure at a point in a fluid is not the same in all directions when the fluid is

Answer 21

viscous and moving

Question 22

What causes convective acceleration in fluid flow?

Answer 22

non-uniformity of flow

Question 23

Ratio if width to depth for the most economical rectangular section in an open channel

Answer 23

2

Question 24

Boundary layer separation is characterized by

Answer 24

Re»>1 decelerating flow

Question 25

Variable orifice flowmeter

Answer 25

Rotameter

Question 26

Reciprocated pumps compared to centrifugal pumps

Answer 26

are bot subjected to air binding

Question 27

Boundary layer separation occurs when

Answer 27

cross section of a channel is reduced

Question 28

for free settling of a spherical particle through a fluid, the slop of Cd-logNre, plot

Answer 28

-1

Question 29

Surge tanks are provided in high pressure water pipelines

Answer 29

to reduce water hammering

Question 30

Navier-Stokes equation deals with the law of conservation of

Answer 30

momentum

Question 31

Isotropic turbulence occurs

Answer 31

where there is no velocity gradient

Question 32

Euler’s equation of motion expresses the law of

Answer 32

conservation of mass

Question 33

Very small pressure difference can be most conveniently measured by an

Answer 33

inclined tube water manometer

Question 34

If two branches of pipes are to be connected at the same point, use

Answer 34

tee

Question 35

Acceleration head in a reciprocating pump ____ the work requirement of the pump

Answer 35

does not change

Question 36

Ratio of inertia force to elastic force

Answer 36

Mach’s number or Cauchy’s number