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Q1. | Manometer is used to measure |

A. | Velocity of liquid [Wrong Answer] |

B. | Atmospheric pressure [Wrong Answer] |

C. | Pressure in pipe and channels [Correct Answer] |

D. | Pressure in venturimeter [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ The bodies which have definite separation points fixed by their shapes are known as

Stream lined bodies

Bluft bodies

Both (A) and (B)

None of the above

⇒ If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be.

from reservoir A to reservoirs B and C

from reservoir B to reservoirs C and A

from reservoir C to reservoirs A and B

unpredictable

⇒ In a fluid flow the line of constant piezometric head passes through two points which have the same

Elevation

Pressure

Velocity

Velocity potential

⇒ A fluid of kinematic viscosity 0.4 cm2/sec flows through a 8 cm diameter pipe. The maximum velocity for laminar flow will be

less than 1 m/sec

1 m/sec

1.5 m/sec

2 m/sec

⇒ The thickness of boundary layer at the leading, (entrance) edge will be

Maximum

Minimum

Zero

Average

⇒ The major loss of energy in long pipes is due to

sudden enlargement

sudden contraction

gradual contraction or enlargement

friction

⇒ Select the incorrect statement.

The pressure intensity at vena contracta is atmospheric.

Contraction is least at vena contracta.

Stream lines are parallel throughout the jet at vena contracta.

Coefficient of contraction is always less than one.

⇒ Which of the following is used to measure the discharge ?

current meter

venturimeter

pitot tube

hotwire anemometer

⇒ Metacentric height for small values of angle of heel is the distance between the

centre of gravity and centre of buoy-ancy

centre of gravity and metacentre

centre of buoyancy and metacentre

free surface and centre of buoyancy

⇒ The distance from pipe boundary, at which the turbulent shear stress is one-third die wall shear stress, is.

1/3 R

1/2 R

2/3 R

3/4R

⇒ The discharge through a V- notch varies as.

H1/2

H3'2

H5/2

H5'4 where H is head.

⇒ Equation of continuity is based on the principle of conservation of.

mass

energy

momentum

none of the above

⇒ A boat with scrap iron is floating in a lake. If the scrap iron is thrown in the lake the water level will

Go up

Go down

Remain unchanged

None of the above

⇒ For laminar flow in a pipe of circular cross-section, the Darcy's friction factor f is.

directly proportional to Reynolds number and independent of pipe wall roughness

directly proportional to pipe wall roughness and independent of Reynolds number

inversely proportional to Reynolds number and indpendent of pipe wall roughness

inversely proportional to Reynolds number and directly proportional to pipe wall roughness

⇒ Separation of flow occurs when.

the pressure intensity reaches a minimum

the cross-section of a channel is reduced

the boundary layer comes to rest

all of the above

⇒ The eddy viscosity for turbulent flow is.

a function of temperature only

a physical property of the fluid.

dependent on the flow

independent of the flow

⇒ Which of the following has highest coefficient of discharge ?

sharp edged orifice

venturimeter

Borda's mouthpiece running full

CipoUetti weir

⇒ Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is

less than d

between d and 1.5 d

between 1.5 d and 2d

greater than 2d

⇒ Pressure measured with the help of piezometer tube is

Atmospheric pressure

Gauge pressure

Absolute pressure

Vacuum pressure

⇒ In a Pelton-wheel, hydraulic efficiency will be maximum when speed of the buckets as compared to velocity of the jet will be

Equal

Double

Half

One fourth

⇒ The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is

1/3

1/4

1/2

2/3

⇒ The total pressure on a plane surface inclined at an angle 9 with the horizontal is equal to.

PA

pA sin 9

pA cos 9

pA tan 9

⇒ If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is.

4/3

3/2

9/4

27/8

⇒ Specific speed of Pelton-wheels having single jet, varies between

10 to 35

10 to 50

60 to 400

300 to 1000

⇒ Drag force is a function of.

i) projected area of the body

ii) mass density of the fluid

iii) velocity of the body

The correct answer is

(i) and (ii)

(i) and (iii)

(ii) and (iii)

(i), (ii) and (iii)

⇒ If the weight of a body immersed in a fluid exceeds the buoyant force, then the body will.

rise until its weight equals the buoyant force

tend to move downward and it may finally sink

float

none of the above

⇒ Which of the following is used to measure the discharge ?

current meter

venturimeter

pitot tube

hotwire anemometer

⇒ Bernoulli's equation is applied to

Venturimeter

Orifice meter

Pitot tube

All of these

⇒ Centre of buoyancy always.

coincides with the centre of gravity

coincides with the centroid of the volume of fluid displaced

remains above the centre of gravity

remains below the centre of gravity

⇒ Stanton diagram is a

log-log plot of friction factor against Reynolds number

log-log plot of relative roughness against Reynolds number

semi-log plot of friction factor against Reynolds number

semi-log plot of friction factor against relative roughness