Home
Current Affairs January 2024

What is the correct answer?

4

When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as

A. Narrow-crested weir

B. Broad-crested weir

C. Ogee weir

D. Submerged weir

Correct Answer :

D. Submerged weir


Related Questions

What is the correct answer?

4

Barometer is used to measure

A. Pressure in pipes, channels etc.

B. Atmospheric pressure

C. Very low pressure

D. Difference of pressure between two points

What is the correct answer?

4

The intensity of pressure at any point, in a liquid, is __________ to the depth of liquid from the surface.

A. Equal

B. Directly proportional

C. Inversely proportional

D. None of these

What is the correct answer?

4

When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is

A. 1.84 (L - 0.1nH)H3/2

B. 1.84 (L - nH)H2

C. 1.84 (L - 0.1nH)H5/2

D. 1.84 (L - nH)H3

What is the correct answer?

4

The pressure at a point 4 m below the free surface of water is

A. 19.24 kPa

B. 29.24 kPa

C. 39.24 kPa

D. 49.24 kPa

What is the correct answer?

4

Dynamic viscosity of most of the gases with rise in temperature

A. Increases

B. Decreases

C. Remain unaffected

D. Unpredictable

What is the correct answer?

4

A vessel of 4 m3 contains oil which weighs 30 kN. The specific weight of the oil is

A. 4.5 kN/m3

B. 6 kN/m3

C. 7.5 kN/m3

D. 10 kN/m3

What is the correct answer?

4

Viscosity of water in comparison to mercury is

A. Higher

B. Lower

C. Same

D. Higher/lower depending on temperature

What is the correct answer?

4

A fluid which obeys the Newton's law of viscosity is termed as

A. Real fluid

B. Ideal fluid

C. Newtonian fluid

D. Non-Newtonian fluid

What is the correct answer?

4

The flow in a pipe is turbulent when Reynold number is

A. Less than 2000

B. Between 2000 and 2800

C. More than 2800

D. None of these

What is the correct answer?

4

The force of buoyancy is always __________ the weight of the liquid displaced by the body.

A. Equal to

B. Less than

C. More than

D. None of these

What is the correct answer?

4

In a venturi-flume, the flow takes place at

A. Atmospheric pressure

B. Gauge pressure

C. Absolute pressure

D. None of these

What is the correct answer?

4

In open channels, the specific energy is the

A. Total energy per unit discharge

B. Total energy measured with respect to the datum passing through the bottom of the channel

C. Total energy measured above the horizontal datum

D. Kinetic energy plotted above the free surface of water

What is the correct answer?

4

When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called

A. Pascal's law

B. Archimedess principle

C. Principle of floatation

D. Bernoulli's theorem

What is the correct answer?

4

Dimensions of surface tension are

A. ML°T⁻²

B. ML°T

C. ML r²

D. ML²T²

What is the correct answer?

4

For a floating body to be in stable equilibrium, its metacentre should be

A. Below the center of gravity

B. Below the center of buoyancy

C. Above the center of buoyancy

D. Above the center of gravity

What is the correct answer?

4

Pitot tube is used for measurement of

A. Pressure

B. Flow

C. Velocity

D. Discharge

What is the correct answer?

4

Alcohol is used in manometers because

A. It has low vapour pressure

B. It is clearly visible

C. It has low surface tension

D. It can provide longer column due to low density

What is the correct answer?

4

Which of the following manometer has highest sensitivity?

A. U-tube with water

B. Inclined U-tube

C. U-tube with mercury

D. Micro-manometer with water

What is the correct answer?

4

An orifice is said to be large, if

A. The size of orifice is large

B. The velocity of flow is large

C. The available head of liquid is more than 5 times the height of orifice

D. The available head of liquid is less than 5 times the height of orifice

What is the correct answer?

4

A large Reynold number is indication of

A. Smooth and streamline flow

B. Laminar flow

C. Steady flow

D. Highly turbulent flow

What is the correct answer?

4

In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is __________ the head of water on the upstream side of weir.

A. Equal to

B. One-third

C. Two-third

D. Three-fourth

What is the correct answer?

4

A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm² and a volume of 0.039 m3 at 150 kg/cm². The bulk modulus of elasticity of liquid is

A. 400 kg/cm²

B. 4000 kg/cm²

C. 40 × 10⁵ kg/cm²

D. 40 × 10⁶ kg/cm²

What is the correct answer?

4

Water is a __________ fluid.

A. Real

B. Ideal

C. Newtonian

D. Non-Newtonian

What is the correct answer?

4

The dynamic viscosity of the liquid __________ with rise in temperature.

A. Remain unaffected

B. Increases

C. Decreases

D. None of these

What is the correct answer?

4

The sheet of water flowing over a notch or a weir is known as

A. Sill or crest

B. Nappe or vein

C. Orifice

D. None of these

What is the correct answer?

4

The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is

A. v₁²/2g

B. v₂²/2g

C. 0.5 v₁²/2g

D. 0.375 v₂²/2g

What is the correct answer?

4

The discharge through an external mouthpiece is given by (where a = Cross-sectional area of the mouthpiece, and H = Height of liquid above the mouthpiece)

A. 0.855 a.√(2gH)

B. 1.855 aH.√(2g)

C. 1.585 a.√(2gH)

D. 5.85 aH.√(2g)

What is the correct answer?

4

Two pipe systems can be said to be equivalent, when the following quantities are same

A. Friction loss and flow

B. Length and diameter

C. Flow and length

D. Friction factor and diameter

What is the correct answer?

4

In an internal mouthpiece, if the jet after contraction does not touch the sides of the mouthpiece, then the mouthpiece is said to be

A. Running full

B. Running free

C. Partially running full

D. Partially running free

What is the correct answer?

4

The discharge through a channel of trapezoidal section is maximum when

A. Width of channel at the top is equal to twice the width at the bottom

B. Depth of channel is equal to the width at the bottom

C. The sloping side is equal to half the width at the top

D. The sloping side is equal to the width at the bottom