**For the most economical trapezoidal section of a channel with regards to discharge, the required condition, is:**

**A.**

Half of top width = sloping side

**B.**

Hydraulic depth = half the depth

**C.**

**D.**

Perpendiculars drawn from the centre of the top width on to the bottom sloping side, are all equal

**E.**

All the above

Options are :

- C
- D
- A
- E
- B

**Answer :**E

Concrete Technology MCQ Practice Questions (Civil Eng) Set 6

**For maximum horse power of a nozzle, the head supplied must be equal to:**

Options are :

- Twice the head loss in the pipe due to friction
- Four times the head loss in the pipe due to friction
- Head loss in the pipe due to friction
- Thrice the head loss in the pipe due to friction

**Answer :**Thrice the head loss in the pipe due to friction

**An ideal fluid is:**

Options are :

- Compressible and non-viscous
- Compressible
- Incompressible
- Slightly affected by surface torque

**Answer :**Compressible and non-viscous

**The value of momentum correction factor (?) for a laminar flow through a circular pipe, is:**

Options are :

- 3/4
- 2/3
- 1/2
- 3/2
- 4/3

**Answer :**4/3

Concrete Technology MCQ Practice Questions (Civil Eng) Set 7

**Molecules of fluids get attracted due to:**

Options are :

- Cohesion
- None of these
- Capillarity action
- Surface tension
- Adhesion

**Answer :**Adhesion

**A
cylindrical vessel 40 cm high is revolved about its vertical axis so
that the water touches the bottom when it just spills out. If the radius
of the cylinder is ?5 cm, the angular velocity of rotation, is:**

Options are :

- None of these
- 3 rad/sec
- 5 rad/sec
- 2 rad/sec
- 4 rad/sec

**Answer :**2 rad/sec

**To avoid vapourisation, pipe lines are laid over the ridge so that these are above the hydraulic gradient line, not more than:**

Options are :

- 5.0 m
- 2.4 m
- 6.4 m
- 10.0 m

**Answer :**6.4 m

Elements of Remote Sensing MCQ Practice Questions (Civil) Set 5

**A fluid particle may possess the displacement of:**

Options are :

- All the above
- Translation
- Rotation
- Distortion

**Answer :**All the above

**If
velocities of fluid particles vary from point to point in magnitude and
direction, as well as from instant to instant, the flow is said to be:**

Options are :

- Non-uniform flow
- Uniform flow
- Laminar
- Turbulent flow

**Answer :**Turbulent flow

**Discharge over an ogee weir remains the same as that of:**

Options are :

- Cippoletti weir
- Drowned weir
- Sharp crested weir
- Triangular weir

**Answer :**Cippoletti weir

Hydraulics MCQ Practice Questions (Civil Engineering) Set 5

**Back water curve is caused if:**

Options are :

- None of these
- Friction head loss is more than the bed slope
- Pressure is due to weir in the channel
- There is an increase in width of the channel

**Answer :**Pressure is due to weir in the channel

**Manometers are used to measure:**

Options are :

- Very low pressure
- Difference in pressure at two points
- Pressure in water channels, pipes etc
- Atmospheric pressure

**Answer :**Pressure in water channels, pipes etc

**In an open tube, free surface of mercury remains:**

Options are :

- Curved downwards
- Curved upwards
- Horizontal
- None of these

**Answer :**Curved downwards

Elements of Remote Sensing MCQ Practice Questions (Civil) Set 3

**Dimensions of the dynamic viscosity (?) are:**

Options are :

- ML^(-1)T^(-1)
- ML^(-1)T^(-2)
- M^(-1)L^(-1)T^(-1)
- MLT^(-2)

**Answer :**ML^(-1)T^(-1)

**Piezometers are used to measure:**

Options are :

- Difference in pressure at two points
- Pressure in water channels, pipes etc
- Very low pressure
- Atmospheric pressure

**Answer :**Very low pressure

**Shear stress is directly proportional to:**

Options are :

- The velocity
- The velocity
- The viscosity
- The shear strain

**Answer :**The shear strain

Elements of Remote Sensing MCQ Practice Questions (Civil) Set 1

**The equation **

Options are :

- Helmholtz
- Bezin
- Newton
- Chezy
- Bernoulli

**Answer :**Newton

**The specific weight of water is 1000 kg/m^(3)**

Options are :

- All the above
- At normal pressure of 760 mm
- At 4°C temperature
- At mean sea level

**Answer :**All the above

**In Newton's viscosity equation **

Options are :

- Dynamic viscosity
- Simple viscosity
- All the above
- Viscosity
- Absolute viscosity

**Answer :**All the above

Hydraulics MCQ Practice Questions (Civil Engineering) Set 3

**To avoid an interruption in the flow of a syphon, an air vessel is provided:**

Options are :

- At the inlet
- At the summit
- At the outlet
- At any point between intet and outlet

**Answer :**At the summit

**If total head available at the inlet of pipe and f1 is the loss of head due to friction in the pipe, the maximum efficiency of transmission of power (?max) is:**

Options are :

- 3/4
- 4/5
- 2/3
- 1/2

**Answer :**2/3

**The magnitude of water hammer in a pipe depends upon:**

Options are :

- Elastic properties of the pipe material
- Length of the pipe line
- Speed at which value is closed
- All the above
- Elastic properties of the following liquid

**Answer :**All the above

Irrigation MCQ Practice Questions (Civil Engineering) Set 3

**Atmospheric pressure is equal to water column head of:**

Options are :

- 7.5 m
- 5.0 m
- 9.81 m
- 10.30 m

**Answer :**10.30 m

**Power transmitted through a pipe is maximum when friction head loss, is:**

Options are :

- One-half of the total head supplied
- One-third of the total head supplied
- Equal to the total head supplied
- One-fouth of the total head supplied

**Answer :**One-third of the total head supplied

**If Cv, Cc, Cd and Cr are the hydraulic coefficients of an orifice, then:**

Options are :

- Cd = Cc . Cv
- Cv = Cc + Cd
- Cc = Cv/Cd
- Cr = 1 + Cv^(2)/Cd

**Answer :**Cd = Cc . Cv

Concrete Technology MCQ Practice Questions (Civil Eng) Set 7

**Which one of the following equation is applicable to unsteady flow in open channels:**

**A.**

**B.**

**C.**

**D.**

Options are :

- A
- D
- C
- B

**Answer :**D

**On an inclined plane, centre of pressure is located:**

Options are :

- Anywhere
- Below the centroid
- At the centroid
- Above the centroid

**Answer :**Below the centroid

**Flow in pipes is turbulent if Reynold number is:**

Options are :

- Between 2100 and 3000
- None of these
- More than 3000
- Less than 2100

**Answer :**More than 3000

Hydraulics MCQ Practice Questions (Civil Engineering) Set 9

**The following is not a laminar flow:**

Options are :

- Rise of water in plants through roots
- Flow in water pipe lines
- Flow in beds in ground water
- Flow of blood in the arteries of human body
- Flow of oil in measuring instruments

**Answer :**Flow in water pipe lines

**When no air is left below the nappe and water stream adheres to the down stream face of the weir, it is known as:**

Options are :

- Free nappe
- Clinging nappe
- Depressed nappe
- None of these

**Answer :**Clinging nappe

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