Q.1

An error ofin measuring the head of water over the crest of a rectangular weir, produces an error in the discharge which is equal to

  • 1.25%
  • 1.5%
  • 1.75%
  • 2.25%
Q.2

The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid, if

  • area is horizontal
  • area is vertical
  • area is inclined
  • all the above.
Q.3

If the volume of a liquid weighingkg is 4 cubic metres, 0.is its

  • specific weight
  • specific mass
  • specific gravity
  • none of these.
Q.4

Inside pressure in a hollow soap bubble in the air is : (where d is the diameter of the bubble)

Q.5

Discharge Q over a rectangular weir of length L and height H, is given by the equation

  • Q = 2/3 Cd2g LH3/2
    152-7.139-1.png
  • Q = 2/3 CdL H2gH
    152-7.139-1.png
  • all the above.
Q.6

The momentum correction factor (β) for the viscous flow through a circular pipe is

  • 1.25
  • 1.33
  • 1.50
  • 1.66
  • 2.00
Q.7

A short tube mouthpiece will not run full at its outlet if the head under which the orifice works, is

  • less than 12.2 m of the water
  • more than 12.2 m of the water
  • equal of 12.2 m of water
  • none of these.
Q.8

Bernoulli's equation assumes that

  • fluid is non-viscous
  • fluid is homogeneous
  • flow is steady
  • flow is along the stream line
  • all the above.
Q.9

The momentum correction factor (β) for the viscous flow through a circular pipe is

  • 1.25
  • 1.33
  • 1.50
  • 1.66
  • 2.00
Q.10

A short tube mouthpiece will not run full at its outlet if the head under which the orifice works, is

  • less than 12.2 m of the water
  • more than 12.2 m of the water
  • equal of 12.2 m of water
  • none of these.
Q.11

A piezometer opening in pipes measures

  • velocity head
  • static pressure
  • total pressure
  • negative static pressure.
Q.12

Hydrostatic pressure on a dam depends upon its

  • length
  • depth
  • shape
  • material
  • both (b) and (c).
Q.13

An independent mass of a fluid does not posses

  • elevation energy
  • kinetic energy
  • pressure energy
  • none of these.
Q.14

A syphon is used

  • to connect water reservoirs at different levels intervened by a hill
  • to supply water to a town from higher level to lower level
  • to fill up a tank with water at higher level from a lower level
  • none of these.
Q.15

A syphon is used

  • to connect water reservoirs at different levels intervened by a hill
  • to supply water to a town from higher level to lower level
  • to fill up a tank with water at higher level from a lower level
  • none of these.
Q.16

When two layers of a fluid separated by dy move over the other with a difference of velocity dv, causes a shearing stress , where μ is known as

  • coefficient of viscosity
  • absolute viscosity
  • dynamic viscosity
  • viscosity
  • all the above.
Q.17

When a body is totally or partially immersed in a fluid, it is buoyed up by a force equal to

  • weight of the body
  • weight of the fluid displaced by the body
  • weight of the body and fluild displaced by the body
  • difference of weights of the fluid displaced and that of the body
  • none of these.
Q.18

The horizontal component of the force on a curved surface is equal to

  • weight of liquid vertically below the curved surface
  • force on a vetical projection of the curved surface
  • product of pressure at its centroid and the area
  • weight of liquid retained by the curved area.
Q.19

A pipe of 0.1 m2 cross sectional area suddenly enlarges to 0.3 m2 cross-sectional area. If the discharge of the pipe is 0.3 m3 /sec, the head loss is

  • 2/g m of water
  • g/2 m of water
  • 1g m of water
  • g m of water.
Q.20

The radius of gyration of the water line of a floating ship is 4 m and its metacentric height is 72.5 cm. The period of oscillation of the ship, is

  • π
  • 2π
  • 3π
  • 4π
  • π/2
Q.21

Maximum efficiency of transmission of power through a pipe, is

  • 25%
  • 33.3%
  • 50%
  • 66.67%.
Q.22

If the total head of the nozzle of a pipe is 37.5 m and discharge is 1 cumec, the power generated is

  • 400 H.P.
  • 450 H.P.
  • 500 H.P.
  • 550 H.P.
Q.23

An ideal flow of a liquid obeys

  • Continuity equation
  • Newton's law of viscosity
  • Newton's second law of motion
  • dynamic viscosity law,
Q.24

If the total head of the nozzle of a pipe is 37.5 m and discharge is 1 cumec, the power generated is

  • 400 H.P.
  • 450 H.P.
  • 500 H.P.
  • 550 H.P.
Q.25

The phenomenon occuring in an open channel when a rapidly flowing stream abruptly changes to a slowly flowing stream causing a distinct rise of liquid surface, is

  • water hammer
  • hydraulic jump
  • critical discharge
  • none of these.
Q.26

The Empirical formula for discharge over large rectangular weirs, is known as

  • Francis formula
  • Bazin formula
  • Rehbook formula
  • Kutter's formula.
Q.27

Reynold number is the ratio of initial force and

  • viscosity
  • elasticity
  • gravitational force
  • surface tension.
Q.28

The diameter (d) of a nozzle fixed at the end of a pipe (diameter D, length L) for maximum energy, is

Q.29

Reynold number is the ratio of initial force and

  • viscosity
  • elasticity
  • gravitational force
  • surface tension.
Q.30

In a circular pipe of length L and diameter d, a viscous liquid is flowing with a velocity v. The loss in head, is

  • none of these.
0 h : 0 m : 1 s