Online Civil Engineering Test - Hydraulics Test

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Total number of questions: 20.
Time allotted: 30 minutes.
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The moment of inertia of a floating body along its longitudinal axis and the volume of water displaced by it are I and V respectively. The height of the metacentre above centre of buoyancy of the body, is

[#]

The shear stress distribution in viscous fluid through a circular pipe is :

maximum at the centre

maximum at the inside of surface

same throughout the section

none of these.

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In fluids, steady flow occurs when

conditions of flow change steadily with time

conditions of flow do not change with time at a point

conditions of flow remain the same at adjacent point

velocity vector remains constant at a point.

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For most economical rectangular section of a channel, the depth is kept

one-fourth of the width

three times the hydraulic radius

half the width

hydraulic mean depth

none of these.

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Specific weight of liquid

remains constant at every place

does not remain constant at every place

varies from place to place on the earth

does not vary on any other planet.

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Which one of the following statements is true ?

The value of kinetic energy correction factor for turbulent flow lies between 1.03 to 1.06

The value of kinetic energy correction factor for laminar flow is 2

The practical value of kinetic energy correction factor for turbulent flow is unity

all the above.

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Manning's formula is used for

flow in open channels

head loss due to friction in open channels

head loss due to friction in pipes flowing full

flow in pipes.

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The dimensionless parameter not applicable to flowing liquids, is

Reynold number

Weber number

Pressure coefficient

Kinematic viscosity

Friction factor.

[#]

The hydrostatic force acts through

centre of pressure

centre of top edge

centre of bottom edge

metacentre.

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10.

Total energy line is

pressure head

datum head

kinetic head

All the above.

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11.

For maximum power transmission through a nozzle, (where h_f is the head lost due to friction)

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12.

The flow in open channel is said to be subcritical if the Froude number is

less than 1.0

equal to 1.0

greater than 1.0

none.

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13.

The velocity of flow at the critical depth (h_c) is called critical velocity (V_c) which is equal to

V_c = g x h_c

g x h_c

None of these.

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14.

Equation of continuity of fluids is applicable only if

flow is steady

flow is compressive

flow is one dimensional

velocity is uniform over the cross-sections

all the above.

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15.

The discharge through an internal mouth piece is more if its length is

diameter

< diameter

≥ diameter

none of these.

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16.

A load w is rolled a distance d across the deck of a ship of weight W, due to which the ship heels through θ°. The metacentric height of the ship, is

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17.

The dimensions MLT^-2 refers to

specific weight

force

discharge

none of these.

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18.

For mountaneous regions having steep slope, wagons for carrying liquid are made with bottom

parallel to the road surface

parallel to the horizontal surface

inclined upward while moving upwards

inclined downward while moving downwards.

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19.

For a long pipe, the head loss

at the entrance is ignored

at the outlet is ignored

at the entrance and outlet both are ignored

due to friction is ignored.

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20.

Chezy's constant

is suggested by

Bazin

Kutter

Manning

Powell.

[#]

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Online Civil Engineering Test - Hydraulics Test

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