The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by

Question

The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by

A. dQ/Q = 3/2 × (dH/H)

B. dQ/Q = 2 × (dH/H)

C. dQ/Q = 5/2 × (dH/H)

D. dQ/Q = 3 × (dH/H)

Share this question with your friends

Show all Fluid Mechanics MCQ

Comment

The critical depth for a channel is given by (where q = Unit discharge (discharge per unit width) through the channel)

A. (q/g)^1/2

B. (q²/g)^1/3

C. (q³/g)^1/4

D. (q⁴/g)^1/5

Discuss this answer

A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be

A. (2A√H₁)/(C_d × a√2g)

B. (2AH₁)/(C_d × a√2g)

C. (2AH₁^3/2)/(C_d × a√2g)

D. (2AH₁²)/(C_d × a√2g)

Discuss this answer

The value of coefficient of discharge is __________ the value of coefficient of velocity.

A. Less than

B. Same as

C. More than

D. None of these

Discuss this answer

The unit of kinematic viscosity in S. I. units is

A. N-m/s

B. N-s/m²

C. m²/s

D. N-m

Discuss this answer

If the coefficient of discharge is 0.6, then the discharge over a right angled notch is

A. 0.417 H^5/2

B. 1.417 H^5/2

C. 4.171 H^5/2

D. 7.141 H^5/2

Discuss this answer

Gradually varied flow is

A. Steady uniform

B. Non-steady non-uniform

C. Non-steady uniform

D. Steady non-uniform

Discuss this answer

The unit of surface tension is

A. N/m

B. N/m²

C. N/m³

D. N-m

Discuss this answer

According to Bazin's formula, the discharge over a rectangular weir is mL2g x H^3/2where m is equal to

A. 0.405 + (0.003/H)

B. 0.003 + (0.405/H)

C. 0.405 + (H/0.003)

D. 0.003 + (H/0.405)

Discuss this answer

Coefficient of velocity is defined as the ratio of

A. Actual velocity of jet at vena contracta to the theoretical velocity

B. Area of jet at vena contracta to the area of orifice

C. Actual discharge through an orifice to the theoretical discharge

D. None of the above

Discuss this answer

With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will

A. Decrease

B. Increase

C. Remain unchanged

D. Depend upon the characteristics of liquid

Discuss this answer

A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used?

A. 1 : 5

B. 1 : 2.5

C. 1 : 25

D. 1 : √5

Discuss this answer

The Euler's equation for the motion of liquids is based upon the assumption that

A. The fluid is non - viscous, homogeneous and incompressible

B. The velocity of flow is uniform over the section

C. The flow is continuous, steady and along the stream line

D. All of the above

Discuss this answer

Euler's number is the ratio of __________ force to pressure force.

A. Inertia

B. Gravity

C. Viscous

D. None of these

Discuss this answer

For measuring flow by a Venturimeter, if should be installed in

A. Vertical line

B. Horizontal line

C. Inclined line with flow downward

D. In any direction and in any location

Discuss this answer

The specific weight of sea water is __________ that of pure water.

A. Same as

B. Less than

C. More than

D. None of these

Discuss this answer

When an internal mouthpiece is running free, the discharge through the mouthpiece is: (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)

A. 0.5 a. √2gH

B. 0.707 a. √2gH

C. 0.855 a. √2gH

D. a. √2gH

Discuss this answer

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

Discuss this answer

The viscosity of water at 20°C is

A. One stoke

B. One centistoke

C. One poise

D. One centipoise

Discuss this answer

Gauge pressure at a point is equal to the absolute pressure __________ the atmospheric pressure.

A. Plus

B. Minus

C. Divide

D. Multiply

Discuss this answer

Surface tension has the units of

A. Newton-sec/m

B. Newton-m/sec

C. Newton/m

D. Newton

Discuss this answer

A vertically immersed surface is shown in the below figure. The distance of its centre of pressure from the water surface is

A. (bd²/12) + x

B. (d²/12 x) + x

C. b²/12 + x

D. d²/12 + x

Discuss this answer

The units of kinematic viscosity are

A. Metres² per sec

B. kg sec/metre

C. Newton-sec per metre

D. Newton-sec per metre

Discuss this answer

The coefficient of discharge for an external mouthpiece depends upon

A. Velocity of liquid

B. Pressure of liquid

C. Area of mouthpiece

D. Length of mouthpiece

Discuss this answer

The Newton's law of resistance is based on the assumption that the

A. Planes of the body are completely smooth

B. Space around the body is completely filled with the fluid

C. Fluid particles do not exert any influence on one another

D. All of the above

Discuss this answer

Uniform flow occurs when

A. The direction and magnitude of the velocity at all points are identical

B. The velocity of successive fluid particles, at any point, is the same at successive periods of time

C. The magnitude and direction of the velocity do not change from point to point in the fluid

D. The fluid particles move in plane or parallel planes and the streamline patterns are identical in each pleasure

Discuss this answer

The normal stress in a fluid will be constant in all directions at a point only if

A. It is incompressible

B. It has uniform viscosity

C. It has zero viscosity

D. It is at rest

Discuss this answer

The unit of viscosity is

A. Metres² per sec

B. kg-sec/metre

C. Newton-sec per metre²

D. Newton-sec per meter

Discuss this answer

Which of the following is the unit of kinematic viscosity?

A. Pascal

B. Poise

C. Stoke

D. Faraday

Discuss this answer

The velocity at which the laminar flow stops, is known as

A. Velocity of approach

B. Lower critical velocity

C. Higher critical velocity

D. None of these

Discuss this answer

When a body, floating in a liquid, is given a small angular displacement, it starts oscillating about a point known as

A. Centre of pressure

B. Centre of gravity

C. Centre of buoyancy

D. Metacentre

Discuss this answer

Accepted Answer

C. dQ/Q = 5/2 × (dH/H)

The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by

Correct Answer :

Show all Fluid Mechanics MCQ

Related Questions

The critical depth for a channel is given by (where q = Unit discharge (discharge per unit width) through the channel)

A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be

The value of coefficient of discharge is __________ the value of coefficient of velocity.

The unit of kinematic viscosity in S. I. units is

If the coefficient of discharge is 0.6, then the discharge over a right angled notch is

Gradually varied flow is

The unit of surface tension is

According to Bazin's formula, the discharge over a rectangular weir is mL2g x H^3/2where m is equal to

Coefficient of velocity is defined as the ratio of

With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will

A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used?

The Euler's equation for the motion of liquids is based upon the assumption that

Euler's number is the ratio of __________ force to pressure force.

For measuring flow by a Venturimeter, if should be installed in

The specific weight of sea water is __________ that of pure water.

When an internal mouthpiece is running free, the discharge through the mouthpiece is: (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)

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

The viscosity of water at 20°C is

Gauge pressure at a point is equal to the absolute pressure __________ the atmospheric pressure.

Surface tension has the units of

A vertically immersed surface is shown in the below figure. The distance of its centre of pressure from the water surface is

The units of kinematic viscosity are

The coefficient of discharge for an external mouthpiece depends upon

The Newton's law of resistance is based on the assumption that the

Uniform flow occurs when

The normal stress in a fluid will be constant in all directions at a point only if

The unit of viscosity is

Which of the following is the unit of kinematic viscosity?

The velocity at which the laminar flow stops, is known as

When a body, floating in a liquid, is given a small angular displacement, it starts oscillating about a point known as

Also checkout

The error in discharge (dQ/Q) to the error in measurement of head (dH/H) over a triangular notch is given by

Correct Answer :

Show all Fluid Mechanics MCQ

Related Questions

The critical depth for a channel is given by (where q = Unit discharge (discharge per unit width) through the channel)

A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be

The value of coefficient of discharge is __________ the value of coefficient of velocity.

The unit of kinematic viscosity in S. I. units is

If the coefficient of discharge is 0.6, then the discharge over a right angled notch is

Gradually varied flow is

The unit of surface tension is

According to Bazin's formula, the discharge over a rectangular weir is mL2g x H3/2where m is equal to

Coefficient of velocity is defined as the ratio of

With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will

A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used?

The Euler's equation for the motion of liquids is based upon the assumption that

Euler's number is the ratio of __________ force to pressure force.

For measuring flow by a Venturimeter, if should be installed in

The specific weight of sea water is __________ that of pure water.

When an internal mouthpiece is running free, the discharge through the mouthpiece is: (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)

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

The viscosity of water at 20°C is

Gauge pressure at a point is equal to the absolute pressure __________ the atmospheric pressure.

Surface tension has the units of

A vertically immersed surface is shown in the below figure. The distance of its centre of pressure from the water surface is

The units of kinematic viscosity are

The coefficient of discharge for an external mouthpiece depends upon

The Newton's law of resistance is based on the assumption that the

Uniform flow occurs when

The normal stress in a fluid will be constant in all directions at a point only if

The unit of viscosity is

Which of the following is the unit of kinematic viscosity?

The velocity at which the laminar flow stops, is known as

When a body, floating in a liquid, is given a small angular displacement, it starts oscillating about a point known as

Also checkout

According to Bazin's formula, the discharge over a rectangular weir is mL2g x H^3/2where m is equal to