Engineering/Civil Engineering -MCQS-Hydraulics Section 1 Sample Test,Sample questions

Question:
 
An ideal flow of a liquid obeys

1.Continuity equation

2.Newton's law of viscosity

3.Newton's second law of motion

4.dynamic viscosity law,


Question:
  
A piezometer opening in pipes measures

1.velocity head

2.static pressure

3.total pressure

4.negative static pressure.


Question:
  
A syphon is used

1.to connect water reservoirs at different levels intervened by a hill

2.to supply water to a town from higher level to lower level

3.to fill up a tank with water at higher level from a lower level

4. none of these.


Question:
  
Differential manometers are used to measure

1. pressure in water channels, pipes, etc.

2. difference in pressure at two points

3.atmospheric pressure

4.very low pressure.


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

1.400 H.P.

2.450 H.P.

3.500 H.P.

4.550 H.P.


Question:
  
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

1.water hammer

2.hydraulic jump

3.critical discharge

4.none of these.


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

1. weight of the body

2.weight of the fluid displaced by the body

3.weight of the body and fluild displaced by the body

4.none of these.


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

1.less than 12.2 m of the water

2.more than 12.2 m of the water

3.equal of 12.2 m of water

4.none of these.


Question:
A tank 4m x 3m x 2m containing an oil of specific gravity 0.83 is moved with an acceleration g/2 m sec2. The ratio of the pressures at its bottom when it is moving vertically up and down, is

1.2

2.3

3.1 upon 2

4.1 upon 3


Question:
An independent mass of a fluid does not posses

1.elevation energy

2. kinetic energy

3.pressure energy

4.none of these.


Question:
Bernoulli's equation assumes that

1.fluid is non-viscous

2.fluid is homogeneous

3.flow is steady

4.all the above.


Question:
Highest dam in India, is

1.Bhakra dam

2.Hirakund dam

3.Nagarjuna Sagar dam

4. Iddiki dam.


Question:
Hydrostatic pressure on a dam depends upon its

1.length

2.depth

3.shape

4. both (b) and (c).


Question:
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.1 kg/cm2, the pressure at a depth of 2.5 m, is

1.1 metre of water

2. 2 metres of water

3.3 metres of water

4. 3.5 metres of water


Question:
If the volume of a liquid weighing 3000 kg is 4 cubic metres, 0.75 is its

1. specific weight

2.specific mass

3. specific gravity

4. none of these.


Question:
A pitot tube is used to measure

1.pressure

2.difference in pressure

3. velocity of flow

4. none of these.


Question:
Maximum efficiency of transmission of power through a pipe, is

1.25%

2.33.30%

3.50%

4.66.67%.


Question:
Most economical section of a circular channel for maximum discharge

1.depth of water = 0.95 diameter of circular section

2.hydraulic mean depth = 0.286 diameter of circular section

3.wetted perimeter = 2.6 diameter of circular section

4. all the above.


Question:
Reynold number is the ratio of initial force and

1.viscosity

2.elasticity

3. gravitational force

4.surface tension.


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

1.weight of liquid vertically below the curved surface

2.force on a vetical projection of the curved surface

3. product of pressure at its centroid and the area

4. weight of liquid retained by the curved area.


Question:
The maximum vacuum created at the summit of a syphon is

1.2.7 m of water

2. 7.4 m of water

3. 5.5 m of water

4.none.


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

1.1.25

2.1.33

3.1.5

4.1.66


Question:
The property of steam function ψ is :

1.ψ is constant everwhere on any stream line

2. the flow around any path in the fluid is zero for continuous flow

3.the rate of change of ψ with distance in an arbitrary direction, is proportional to the component of velocity normal to that direction

4.all the above.


Question:
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

1.π

2.2π

3.3π

4.4π


Question:
The ratio of maximum velocity to average velocity of viscous fluid through a circular pipe is

1.0.5

2.0.75

3.1.25

4.2


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

1.maximum at the centre

2.maximum at the inside of surface

3.same throughout the section

4. none of these.


Question:
The side slope of Cipolletti weir is generally kept

1.1 to 4

2.1 to 3

3.1 to 2

4. 1 : 5


Question:
The thickness of a sharp crested weir is kept less than

1.one-third of the height of water on the sill

2.one-half of the height of water on the sill

3.one-fourth of the height of water on the sill

4.two-third of the height of water on the sill


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

1.area is horizontal

2.area is vertical

3. area is inclined

4.all the above.


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