The upper surface of a weir over which water flows is known is (A) Crest (B) Nappy (C) Sill (D) Weir top

The upper surface of a weir over which water flows is known is
(A) Crest
(B) Nappy
(C) Sill
(D) Weir top
by

1 Answer

Answer :

Answer: Option C
by

Related questions

The top of the weir over which the water flows is known as (A) Sill or crest (B) Nappe or vein (C) Orifice (D) None of these

Description : The top of the weir over which the water flows is known as (A) Sill or crest (B) Nappe or vein (C) Orifice (D) None of these

Last Answer : Answer: Option A

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 thes

Description : 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 thes

Last Answer : Answer: Option B

09. According to Bazin, the coefficient of discharge varies with the height of water over the sill of a weir. A) Correct B) Incorrect

Description : 09. According to Bazin, the coefficient of discharge varies with the height of water over the sill of a weir. A) Correct B) Incorrect

Last Answer : A

The length of a liquid stream while flowing over a weir __________ at the ends of the sill. (A) Expands (B) Does not change (C) Contracts (D) None of these

Description : The length of a liquid stream while flowing over a weir __________ at the ends of the sill. (A) Expands (B) Does not change (C) Contracts (D) None of these

Last Answer : Answer: Option C

The absolute percentage error in the computed discharge over a rectangular weir corresponding to an absolute error of 1.5 % in the measurement of head over the sill of the weir would be : (a) 1.5 (b) 2.25 (c) 2.5 (d) 3.75

Description : The absolute percentage error in the computed discharge over a rectangular weir corresponding to an absolute error of 1.5 % in the measurement of head over the sill of the weir would be : (a) 1.5 (b) 2.25 (c) 2.5 (d) 3.75

Last Answer : (b) 2.25

The flow of water after spilling over the weir crest in chute spillway and side channel spillway respectively are (A) At right angle and parallel to weir crest (B) Parallel and at right angle to weir crest (C) Parallel to weir crest in both (D) At right angle to weir crest in both

Description : The flow of water after spilling over the weir crest in chute spillway and side channel spillway respectively are (A) At right angle and parallel to weir crest (B) Parallel and at right angle to weir crest (C) Parallel to weir crest in both (D) At right angle to weir crest in both

Last Answer : Answer: Option A

The discharge over a rectangular weir, considering the velocity of approach, is (whereH1 = H + Ha = Total height of water above the weir, H = Height of water over the crest of the weir, and Ha = Height of water due to velocity of approach) (A) (2/3) Cd × L. 2g [H1 - Ha] (B) (2/3) Cd × L. 2g [H1 3/2 - Ha 3/2] (C) (2/3) Cd × L. 2g [H1 2 - Ha 2 ] (D) (2/3) Cd × L. 2g [H1 5/2 - Ha 5/2]

Description : The discharge over a rectangular weir, considering the velocity of approach, is (whereH1 = H + Ha = Total height of water above the weir, H = Height of water over the crest of the weir, and Ha = Height of water due to velocity of ... 2g [H1 2 - Ha 2 ] (D) (2/3) Cd L. 2g [H1 5/2 - Ha 5/2]

Last Answer : Answer: Option B

13. In a sharp-crested weir, the thickness of the weir is kept less than half of the height of water above the crest of the weir. A) True B) False

Description : 13. In a sharp-crested weir, the thickness of the weir is kept less than half of the height of water above the crest of the weir. A) True B) False

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A weir is said to be broad crested weir, if the width of the crest of the weir is ________ half the height of water above the weir crest. (A) Equal to (B) Less than (C) More than (D) None of these

Description : A weir is said to be broad crested weir, if the width of the crest of the weir is ________ half the height of water above the weir crest. (A) Equal to (B) Less than (C) More than (D) None of these

Last Answer : Answer: Option C

A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest. (A) Equal to (B) Less than (C) More than (D) None of these

Description : A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest. (A) Equal to (B) Less than (C) More than (D) None of these

Last Answer : Answer: Option B

As compared to crest of the normal portion of the weir, the crest of the under sluice portion of weir is kept at (A) Lower level (B) Higher level (C) Same level (D) Any of the above depending on the design

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A structure used to dam up a stream or river over which the water flows is called (A) Orifice (B) Notch (C) Weir (D) Dam

Description : A structure used to dam up a stream or river over which the water flows is called (A) Orifice (B) Notch (C) Weir (D) Dam

Last Answer : Answer: Option C

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

Description : 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

Last Answer : Answer: Option D

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An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called (A) Weir (B) Notch (C) Orifice(D) None of these

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Last Answer : Answer: Option B

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Last Answer : (D) All of the above

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The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch) (A) (2/3) Cd × b × gH) (B) (2/3) Cd × b × g) × H (C) (2/3) Cd × b × g) × H 3/2 (D) (2/3) Cd × b × g) × H

Description : The discharge over a rectangular notch is (where b = Width of notch, and H = Height of liquid, above the sill of the notch) (A) (2/3) Cd × b × gH) (B) (2/3) Cd × b × g) × H (C) (2/3) Cd × b × g) × H 3/2 (D) (2/3) Cd × b × g) × H

Last Answer : Answer: Option C

Water gets evaporated from water surfaces and land surfaces, get converted into water drops at lower temperatures, flows over ground surface and finally meets its source, i.e. lake, sea, etc. This entire process is generally known as (A) Hydrological cycle (B) Water cycle (C) Evaporation and precipitation cycle (D) All the above

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Description : The Francis formula for the discharge over Cipoletti weir is (A) 1.84 LH1/2 (B) 1.84 LH (C) 1.84 LH3/2 (D) 1.84 LH5/

Last Answer : Answer: Option C

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)

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Last Answer : Answer: Option A

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)H 3/2 (B) 1.84(L - nH)H 2 (C) 1.84(L - 0.1nH)H 5/2 (D) 1.84(L - nH)H 3

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Last Answer : Answer: Option A

The maximum discharge over a broad crested weir is (A) 0.384 Cd × L × H1/2 (B) 0.384 Cd × L × H3/2 (C) 1.71 Cd × L × H1/(D) 1.71 Cd × L × H 3/

Description : The maximum discharge over a broad crested weir is (A) 0.384 Cd × L × H1/2 (B) 0.384 Cd × L × H3/2 (C) 1.71 Cd × L × H1/ (D) 1.71 Cd × L × H 3/

Last Answer : Answer: Option D

An error of 1% in measuring head over the crest of the notch (H) will produce an error of __________ in discharge over a triangular notch, (A) 1 % (B) 1.5 % (C) 2 % (D) 2.5 %

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Last Answer : Answer: Option D

Most important method for calculating discharge for planning a water supply project, is (A) Velocity area method (B) Weir or spillway method (C) Use of venturi-meter (D) Using power plant consumption

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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

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Last Answer : Answer: Option C

m and n are monsoon duration factor and catchment factor respectively. If P is yearly rainfall in cm, runoff can be calculated by (A) Velocity area method (B) Weir or spillway method (C) Use of venturi-meter (D) Using power plant consumption

Description : m and n are monsoon duration factor and catchment factor respectively. If P is yearly rainfall in  cm, runoff can be calculated by  (A) Velocity area method  (B) Weir or spillway method  (C) Use of venturi-meter  (D) Using power plant consumption 

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The main function of a divide wall is to (A) Control the silt entry in the canal (B) Prevent river floods from entering the canal (C) Separate the under-sluices from weir proper (D) Provide smooth flow at sufficiently low velocity

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Last Answer : Answer: Option C

A control meter is preferred to a weir because (A) It measures the discharge even in silt Leiden streams (B) The velocity of approach of the channel increases above the control, and thus removes the silt completely (C) It is not damaged by floating debris (D) All the above

Description : A control meter is preferred to a weir because (A) It measures the discharge even in silt Leiden streams (B) The velocity of approach of the channel increases above the control, and thus removes the silt completely (C) It is not damaged by floating debris (D) All the above

Last Answer : Answer: Option D

divide wall is provided (A) At right angle to the axis of weir (B) Parallel to the axis of weir and upstream of it (C) Parallel to the axis of weir and downstream of it (D) At an inclination to the axis of weir

Description : divide wall is provided (A) At right angle to the axis of weir (B) Parallel to the axis of weir and upstream of it (C) Parallel to the axis of weir and downstream of it (D) At an inclination to the axis of weir

Last Answer : Answer: Option A

Generally the weir is aligned at right angles to the direction of the main river current because (A) It ensures less length of the weir (B) It gives better discharging capacity (C) It is economical (D) All of the above

Description : Generally the weir is aligned at right angles to the direction of the main river current because (A) It ensures less length of the weir (B) It gives better discharging capacity (C) It is economical (D) All of the above

Last Answer : Answer: Option D

05. When the end contractions of the weir are suppressed, then number of end contractions (n) are taken as zero. A) Agree B) Disagree

Description : 05. When the end contractions of the weir are suppressed, then number of end contractions (n) are taken as zero. A) Agree B) Disagree

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08. The difference between the notch and weir is that the notch is of bigger size and the weir is of a smaller size. A) Agree B) Disagree

Description : 08. The difference between the notch and weir is that the notch is of bigger size and the weir is of a smaller size. A) Agree B) Disagree

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A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a (A) Notch (B) Weir (C) Mouthpiece (D) Nozzle

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A weir, generally, used as a spillway of a dam is (A) Narrow crested weir (B) Broad crested weir (C) Ogee weir (D) Submerged weir

Description : A weir, generally, used as a spillway of a dam is (A) Narrow crested weir (B) Broad crested weir (C) Ogee weir (D) Submerged weir

Last Answer : Answer: Option C

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Description : The Cipoletti weir is a __________ weir. (A) Rectangular (B) Triangular (C) Trapezoidal (D) Circular

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