Engineering/Civil Engineering -MCQS-Hydraulics Section 6 Sample Test,Sample questions

Question:
 
For a long pipe, the head loss

1.at the entrance is ignored

2. at the outlet is ignored

3. at the entrance and outlet both are ignored

4.due to friction is ignored.


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

1.parallel to the road surface

2.parallel to the horizontal surface

3. inclined upward while moving upwards

4.inclined downward while moving downwards.


Question:
 
Hydraulic radius is equal to

1.area divided by the square of wetted perimeter

2. area divided by wetted perimeter

3.wetted perimeter divided by area

4.square root of the area


Question:
 
In two dimensional flow the components of velocity are given by u = ax; v = by. The stream lines will be

1.circular

2.parabolic

3.hyperbolic

4.elliptical.


Question:
 
Pick up the correct statement from the following :

1.The fluids which follow are known as Newtonian fluids

2.The fluids which do not follow the linear relationship between shear and rate of strain are known as non Newtonian fluids

3.The substances which flow after yield strains, are known as plastics

4.all the above.


Question:
 
Pick up the correct statement from the following :

1.The fluids which follow are known as Newtonian fluids

2.The fluids which do not follow the linear relationship between shear and rate of strain are known as non Newtonian fluids

3.The substances which flow after yield strains, are known as plastics

4.all the above.


Question:
 
The flow is called rotational if its velocity normal to the plane of area is equal to

1.angular velocity vector

2.twice the angular velocity vector

3. thrice the angular velocity vector

4.none of these.


Question:
 
The ratio of the inertia and viscous forces acting in any flow, ignoring other forces, is called

1.Euler number

2.Frode number

3.Reynold number

4.Weber number.


Question:
  
In a fluid flow a particle may posses

1.elevation energy

2.kinetic energy

3.pressure energy

4. initial energy


Question:
  
In a venturimeter, the divergent cone is kept

1.shorter than convergent cone

2.equal to covergent cone

3.longer than convergent cone

4.none of these.


Question:
  
On a flow net diagram, the distance between two consecutive steam lines at two successive sections are 1 cm and 0.5 cm respectively. If the velocity at the first section is 1 m/sec, the velocity at the second is

1.1.0 m/sec

2. 0.5 m/sec

3. 2.0 m/sec

4.2.5 m/sec


Question:
  
Water belongs to

1.Newtonian fluids

2.non-Newtonian fluids

3.compressible fluid

4.none of these.


Question:
A water tank partially filled with water is being carried on a truck moving with a constant horizontal acceleration. The level of the water

1.rises on the front side of the tank

2.falls on the back side of the tank

3.remains the same at both sides of the tank

4. rises on the back side and falls on the front side


Question:
An error of 1% in measuring the head of water over the crest of a rectangular weir, produces an error in the discharge which is equal to

1.1.25%

2.1.50%

3.1.75%

4.2.25%


Question:
Capillary rise of water is

1.directly proportional to surface tension

2.inversely proportional to water density

3. inversely proportional to diameter of the tube

4. All of these.


Question:
Energy equation is usually applicable to

1. non-uniform flow

2.turbulent flow

3.laminar flow

4.steady flow.


Question:
Flow of water in pipes of diameter more than 3 metres, can be measured by

1.pitot tube

2.venturimeter

3.orifice plate

4.rotameter.


Question:
For a most economical rectangular channel, the hydraulic mean depth, is equal to

1.the depth of flow

2.half the depth of flow

3.one-third depth of flow

4.None of these.


Question:
he ratio of inertia force of a flowing fluid and the viscous force of the liquid is called :

1.Renold's number

2.Froude's number

3.Euler's number

4.Weber's number.


Question:
Hydraulic coefficient of an orifice means the coefficient of

1.velocity

2.contraction

3.resistance

4.all the above.


Question:
Hydraulic grade line

1.remains above the centre line of conduit

2.remains below the centre line of conduit

3.remains parallel to the centre line of conduit

4.may be above or below the centre line of conduit.


Question:
If the Mach number for a fluid flow is less than 1, the flow is

1.sonic

2.supersonic

3.sub-sonic

4.none of these.


Question:
In flowing liquids pitot tubes are used measure

1.discharge

2.pressure

3.velocity

4.depth.


Question:
Orifice-meter is used to measure

1.pressure at the point

2.discharge

3.average speed

4.velocity.


Question:
Pick up the correct statement from the following :

1.Dimensional homogeneity means the dimensions of each term in an equation on both sides are equal

2. Dimensionally homogeneous equations are independent of the system of units

3.In dimensionally homogeneous equation, the powers of fundamental dimensions on either side of the equation are identical

4.All the above.


Question:
Poise is the unit of

1.viscosity

2. velocity gradient

3.mass density

4.kinematic viscous.


Question:
Specific weight of sea water is more than that of pure water because of

1.dissolved air

2.dissolved salts

3.suspended matter

4.all the above.


Question:
The acceleration f required to accelerate a rectangular tank containing water horizontally so that the slope of its free surface is 45°, is

1.g/2

2.g

3.2 g

4.2.5 g


Question:
The instrument used for measuring the velocity of flow, is known as

1.venturimeter

2.orifice meter

3.. pitot tube

4.none of these.


Question:
The upper surface of the weir over which water flows, is known as

1.vein

2.nappe

3.sill

4.none of these.


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