**In fluids, steady flow occurs when:**

Options are :

- Velocity vector remains constant at a point
- Conditions of flow do not change with time at a point
- Conditions of flow change steadily with time
- Conditions of flow remain the same at adjacent point

**Answer :**Conditions of flow do not change with time at a point

**The main assumption of Bernoulli's equation is:**

Options are :

- The velocity of energy of liquid particle, across any cross-section of a pipe is uniform
- There is no loss of energy of the liquid while flowing
- No external force except the gravity acts on the liquid
- All the above

**Answer :**All the above

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

Options are :

- Half the width
- One-fourth of the width
- Three times the hydraulic radius
- Hydraulic mean depth
- None of these

**Answer :**Half the width

Hydraulics MCQ Practice Questions (Civil Engineering) Set 2

**The
height of water level in a tank above the centre of a circular hole 2.5
cm in diameter is 50 m. The velocity of water flowing through the hole,
is:**

Options are :

- 31.3 m/sec
- 31.1 m/sec
- 31.4 m/sec
- 31.2 m/sec

**Answer :**31.3 m/sec

**The discharge over a Cipolletti weir of length 2.185 m when the head over the weir is 1 m, is:**

Options are :

- 2.5 m^(3)
- 2.0 m^(3)
- 4.0 m^(3)
- 3.0 m^(3)

**Answer :**4.0 m^(3)

**The terminal velocity ( v) of a sphere of radius r and specific weight W, which travels vertically downwards in a liquid of viscosity ? and specific weight W, is:**

**A.**

**B.**

**C.**

**D.**

Options are :

- A
- D
- B
- C

**Answer :**B

Hydraulics MCQ Practice Questions (Civil Engineering) Set 4

**Liquids:**

Options are :

- Do not occupy definite shape
- Are not affected by change in pressure and temperature
- None of these
- Cannot be compressed

**Answer :**Do not occupy definite shape

**Euler's equation for the motion of liquids assumes that:**

Options are :

- Fluid is viscous
- Fluid is homogeneous and incompressible
- Velocity of flow is non-uniform over the section
- Flow is unsteady along the stream line

**Answer :**Fluid is homogeneous and incompressible

**When water flows over a rectangular suppressed weir, the negative pressure created beneath the nappe:**

Options are :

- None of these
- Increases the discharge
- Decreases the discharge
- Does not effect the discharge

**Answer :**Increases the discharge

Irrigation MCQ Practice Questions (Civil Engineering) Set 4

**Cavitation is caused by:**

Options are :

- High velocity
- None of these
- High pressure
- Low velocity
- Low pressure

**Answer :**Low pressure

**The velocity of the fluid particle at the centre of the pipe section, is:**

Options are :

- Maximum
- Equal throughout
- None of these
- Minimum

**Answer :**Maximum

**Total head of a liquid particle in motion is the sum of:**

Options are :

- Potential head and pressure head
- Potential head, kinetic head and pressure head
- Potential head and kinetic head
- Kinetic head and pressure head

**Answer :**Potential head, kinetic head and pressure head

RCC Structures Design MCQ Practice Questions (Civil Eng) Set 6

**In a centrifugual pump casing, the flow of water leaving the impeller, is:**

Options are :

- Forced vertex
- Rectilinear flow
- Free vortex motion
- Radial flow

**Answer :**Free vortex motion

*A
closed cylindrical vessel of 100 cm diameter and 200 cm high is
completely filled with a liquid (sp. weight 1600 kg/m3) when rotated
about its vertical axis at 100 r.p.m. *

**The total pressure on its lid, is**

Options are :

- 459 kg
- 945 kg
- 95.4 kg
- 954 kg
- 549 kg

**Answer :**954 kg

**Due to decrease of diameter of the droplet, inside pressure intensity:**

Options are :

- Decreases
- Remains unaffected
- Increases
- None of these

**Answer :**Increases

Hydraulics MCQ Practice Questions (Civil Engineering) Set 9

**If
jet of water coming out from a nozzle with a velocity 9.81 m/s, the
angle of elevation being 30°, the time to reach the highest point is:**

Options are :

- 0.25 s
- 1.5 s
- 1.0 s
- 0.50 s

**Answer :**0.50 s

*The discharge through a 100 mm diameter external mouth piece fitted to the side of a large vessel is 0.05948 m^(3)/s*

**The head over the mouth piece is:**

Options are :

- 3.0 m
- 2 m
- 4.0 m
- 2.5 m

**Answer :**4.0 m

**Hydraulic gradient is equal to difference in water surfaces:**

**A.**

**B.**

**C.**

**D.**

Options are :

- A
- D
- C
- B

**Answer :**B

Hydraulics MCQ Practice Questions (Civil Engineering) Set 8

**Mercury is generally used in barometers because:**

Options are :

- It is a best liquid
- None of these
- Its vapour pressure is practically zero
- The height of the barometer will be less

**Answer :**Its vapour pressure is practically zero
The height of the barometer will be less

**The mouth piece shown in the below figure is generally known as:**

Options are :

- Re-entrant mouth piece
- All the above
- Internal mouth piece
- Borda's mouth piece

**Answer :**All the above

**If
cohesion between the molecules of a fluid is more than adhesion between
the fluid and glass, the free level of fluid in a dipped glass tube
will be:**

Options are :

- Same as the surface of liquid
- Lower than the surface of liquid
- None of these
- Higher than the surface of liquid

**Answer :**Lower than the surface of liquid

Concrete Technology MCQ Practice Questions (Civil Eng) Set 7

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

Options are :

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

**Answer :**Less than 2100

**Hydraulic ram is a device:**

Options are :

- For accelerating water flow
- For lifting water without an electric motor
- For lifting heavy loads
- None of these

**Answer :**For lifting water without an electric motor

**If u, v, w are the components of the velocity v of a moving particle, the equation **

Options are :

- None of these
- Two dimensional flow
- One diamensional flow
- Three dimensional flow

**Answer :**Three dimensional flow

RCC Structures Design MCQ Practice Questions (Civil Eng) Set 5

**In pipe lines, a surge tank is provided:**

Options are :

- To provide additional water head
- To remove the frictional loss in pipe
- To overflow the pipe line when suddenly closed
- To relieve the pressure due to water hammer

**Answer :**To relieve the pressure due to water hammer

**For critical depth of flow of water in open channels, fc the specific energy must be:**

Options are :

- Minimum
- Maximum
- None of these
- Average of maximum and minimum

**Answer :**Minimum

**The valve closure is said to be sudden if:**

**A.**

**B.**

**C.**

**D.**

Options are :

- D
- C
- A
- B

**Answer :**B

RCC Structures Design MCQ Practice Questions (Civil Eng) Set 7

**An orifice is taken as large if:**

Options are :

- (H2 - H1) > H/4
- (H2 - H1) > H/2
- (H2 - H1) > H/3
- (H2 - H1) > H

**Answer :**(H2 - H1) > H/3

**Mach number is the ratio of inertia force to:**

Options are :

- Gravitational force
- Surface tension
- Viscosity
- Elasticity

**Answer :**Elasticity

**The continuity equation:**

Options are :

- Relates the momentum per unit volume between two points on a stream line
- Requires that Newton's second law of motion be satisfied at every point in fluid
- Expresses the relationship between work and energy
- Relates mass rate of flow along a stream line

**Answer :**Relates mass rate of flow along a stream line

- RCC Structures Design MCQ Practice Questions (Civil Eng) Set 1
- RCC Structures Design MCQ Practice Questions (Civil Eng) Set 4
- Theory of Structures MCQ Practice Questions (Civil Eng) Set 1
- Construction Management MCQ Practice Questions (Civil Eng) Set 1
- Construction Management MCQ Practice Questions (Civil Eng) Set 3
- Theory of Structures MCQ Practice Questions (Civil Eng) Set 6
- Elements of Remote Sensing MCQ Practice Questions (Civil) Set 3
- Hydraulics MCQ Practice Questions (Civil Engineering) Set 9
- RCC Structures Design MCQ Practice Questions (Civil Eng) Set 5
- Theory of Structures MCQ Practice Questions (Civil Eng) Set 2
- Hydraulics MCQ Practice Questions (Civil Engineering) Set 5
- RCC Structures Design MCQ Practice Questions (Civil Eng) Set 7