# Q1: In open channels, the specific energy is the

A total energy per unit discharge
B total energy measured with respect to the datum passing through the bottom of the channel
C total energy measured above the horizontal datum
D kinetic energy plotted above the free surface of water

# Q2: Coefficient of contraction is the ratio of

A actual velocity of jet at vena contracta to the theoretical velocity
B loss of head in the orifice to the head of water available at the exit of the orifice
C actual discharge through an orifice to the theoretical discharge
D area of jet at vena contracta to the area of orifice

# Q3: The kinematic viscosity is the

A ratio of absolute viscosity to the density of the liquid
B ratio of density of the liquid to the absolute viscosity
C product of absolute viscosity and density of the liquid
D product of absolute viscosity and mass of the liquid

A incompressible
B compressible

A 1%
B 1.5%
C 2%
D 2.5%

A less than
B more than

A
B
C
D

A less than
B more than

# Q9: In a free nappe,

A the pressure below the nappe is atmospheric
B the pressure below the nappe is negative
C the pressure above the nappe is atmospheric
D the pressure above the nappe is negative

# Q10: The discharge through a siphon spillway is

A Cd x a2gH
B Cd x a2g x H3/2
C Cd x a2g x H2
D Cd x a2g x H5/2

# Q11: The stability of a dam is checked for

A tension at the base
B overturning of the wall or dam
C sliding of the wall or dam
D all of these

# Q12: The weight per unit volume of a liquid at a standard temperature and pressure is called

A specific weight
B mass density
C specific gravity
D none of these

# Q13: The metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement.

A The bodies A and B have equal stability
B The body A is more stable than body B
C The body B is more stable than body A
D The bodies A and B are unstable

# Q15: The coefficient of viscosity may be determined by

A capillary tube method
B orifice type viscometer
C rotating cylinder method
D all of these

# Q16: The centre of gravity of the volume of the liquid displaced is called

A centre of pressure
B centre of buoyancy
C metacentre
D none of these

A
Cd x b2gH
B
Cd x b2g x H
C
Cd x b2g x H3/2
D Cd x b2g x H2

A 1/RN
B 4/RN
C 16/RN
D 64/RN

A wH
B wH/2
C wH2/2
D wH2/3

# Q20: Euler's equation in the differential form for the motion of liquids is given by

A
B
C ρ.dp + g.dz + v.dv = 0
D ρ.dp - g.dz + v.dv = 0

A w1a1 = w2a2
B w1v1 = w2v2
C a1v1 = a2v2
D a1/v1 = a2/v2

A Agree
B Disagree

A Correct
B Incorrect

# Q24: Which of the following is an example of laminar flow?

A Under ground flow
B Flow past tiny bodies
C Flow of oil in measuring instruments
D all of these

# Q25: Coefficient of resistance is the ratio of

A actual velocity of jet at vena contracta to the theoretical velocity
B area of jet at vena contracta to the area of orifice
C loss of head in the orifice to the head of water available at the exit of the orifice
D actual discharge through an orifice to the dieoretical discharge

A 0.375
B 0.5
C 0.707
D 0.855

A True
B False

A Correct
B Incorrect

# Q29: In order to measure the flow with a venturimeter, it is installed in

A horizontal line
B inclined line with flow upwards
C inclined line with flow downwards
D any direction and in any location

# Q30: The discharge through a large rectangular orifice is given by (where H1 = Height of the liquid above the top of the orifice, H2 = Height of the liquid above the bottom of the orifice, b = Breadth of the orifice, and Cd = Coefficient of discharge)

A Q = Cd x b2g(H2 - H1)
B
Q = Cd x b2g(H21/2 - H11/2)
C
Q = Cd x b2g(H23/2 - H13/2)
D
Q = Cd x b2g(H22 - H12)

# Q31: The maximum discharge over a broad crested weir is

A 0.384 Cd x L x H1/2
B 0.384 Cd x L x H3/2
C 1.71 Cd x L x H1/2
D 1.71 Cd x L x H3/2

# Q32: The pressure less than atmospheric pressure is known as

A suction pressure
B vacuum pressure
C negative gauge pressure
D all of these

A Cd 2g x H
B Cd 2g x H3/2
C
Cd 2g x H2
D
Cd 2g x H5/2

# Q34: A manometer is used to measure

A low pressure
B moderate pressure
C high pressure
D atomospheric pressure

# Q35: The value of bulk modulus of a fluid is required to determine

A Reynold's number
B Froude's number
C Mach number
D Euler's number

A w x Q x H
B w x Q x hf
C w x Q (H - hf)
D w x Q (H + hf)

# Q37: In one dimensional flow, the flow

B takes place in straight line
C takes place in curve
D takes place in one direction

# Q38: The Bernoulli's equation is based on the assumption that

A there is no loss of energy of the liquid flowing
B the velocity of flow is uniform across any cross-section of the pipe
C no force except gravity acts on the fluid
D all of the above

A 100 cm3
B 250 cm3
C 500 cm3
D 1000 cm3

A higher
B lower

# Q41: The Reynold's number of a ship is __________ to its velocity and length.

A directly proportional
B inversely proportional

A
B
C
D

A 50%
B 56.7%
C 66.67%
D 76.66%

A N/mm2
B N/m2
D all of these

# Q45: In a depressed nappe

A the pressure below the nappe is atmospheric
B the pressure below the nappe is negative
C the pressure above the nappe is atmospheric
D the pressure above the nappe is negative

A True
B False

A
B
C
D

A equal to
B less than
C more than

# Q49: If a body floating in a liquid returns back to its original position, when given a small angular displacement, the body is said to be in

A neutral equilibrium
B stable equilibrium
C unstable equilibrium
D none of these

# Q50: A weir is said to be broad crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.

A equal to.
B less than
C more than

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