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Consider the following statements about Bligh’s Creep Theory. i. Creep length is the length of path traversed by percolating water ii. To increase the path of percolation vertical cut-off or sheet piles can be provided iii. Loss of head per unit creep length is hydraulic gradient iv. Bligh gave no criteria for the safety of weir against undermining Which of the following statements are correct?

Consider the following statements about Bligh’s Creep Theory. i. Creep length is the length of path traversed by percolating water ii. To increase the path of percolation vertical cut-off or sheet piles can be provided iii. Loss of head per unit creep length is hydraulic gradient iv. Bligh gave no criteria for the safety of weir against undermining Which of the following statements are correct? Correct Answer i, ii, iii

According to the theory, safety against piping can be ensured by providing sufficient creep length. It is given by – L = CH where, C = Bligh’s coefficient and H = seepage head OR Hydraulic gradient (i) ≤ 1/C.

Related Questions

P. A weir is a hydraulic structure where majority or the entire ponding is achieved by a raised crest and smaller part or nil part by the shutters. Q. A weir is a hydraulic structure that is made by constructing the width of the channel only. R. A barrage is a hydraulic structure that is made by creating a choking condition only. S. A barrage is a hydraulic structure where majority or the entire ponding is achieved by a shutter and smaller part or nil part by the raised crest. Identify the correct statements in the above.
"It is now expected that the variable production cost per unit and the selling price per unit will each increase by 10%, and fixed production cost will rise by 25%. What will be the new break even point?
Selling price - Rs 6 per unit
Variable production cost - Rs 1.20 per unit
Variable selling cost - Rs 0.40 per unit
Fixed production cost - Rs 4 per unit
Fixed selling cost - Rs 0.80 per unit
Budgeted production and sales for the year are 10,000 units."
According to Bligh's creep theory, percolating water flows along
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.
Consider the following statements with respect to weir under discussion: 1. Its design corresponds to soft sandy foundation. 2. The difference in weir crest and downstream river bed may not exceed 3. When water passes over it, the longitudinal location of the formation of a hydraulic jump is variable. This weir is of the type
In the question below, are given a statement followed by three courses of actions numbered I, II and III. On the basis of the information given, you have to assume everything in the statement to be true, and then decide which of the following suggested courses of actions logically follow(s) for pursuing. Statement: Starting October, all new cars will have pedestrian safety features, including new design of the bonnet, to reduce impact on pedestrians during accidents. Advanced safety features are needed in all vehicles in India as vehicle safety cannot be confined to luxury vehicles only. Around 1.5 lakh people are killed in road accidents every year in the country, nearly 60% of them are pedestrians.  Courses of action: I. The government has set a target to reduce the number of road deaths by half in the next two years. The ministry of road transport and highways has been issuing new safety standards for the automobiles along with eliminating the black spots on national highways.  II. By next month, all new cars will have pedestrian safety feature, including new design of the bonnet, to reduce impact on pedestrians during accidents.  III. Ministry of road transport and Highways is planning to implement all safety features in vehicles with active support of vehicle manufacturers. Electronic stability control (ESC) and autonomous emergency braking (AEB) will be incorporated in new vehicles by 2022.
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 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.
Study the following information carefully and answer the question given below. The following criteria have been introduced for the appointment of a scientist in a research organization. Candidates: 1) Must be a postgraduate in Mathematics/Physics/Chemistry subject with a minimum of 65% marks 2) Age should not be less than 26 years and not more than 35 years as on 01-01-2018 3) Must have a post-doctoral degree with more than 50% marks 4) Should have a minimum of 3 years of experience in the above fields 5) Should be prepared to be under probation for one year If the candidate satisfies all the criteria other than (3), he may be designated as Project Scientist. If the candidate satisfies all the above criteria other than (3) and (4) he may be referred for the post of Junior Scientist. If the candidate fulfills all the above criteria with 7 years of experience in the relevant fields, he/she can be designated as a Senior Scientist. If the candidate fulfills all the above criteria with 12 years of experience in the relevant field, he/she can be designated as Principal Scientist. Varun's age is 27 years as of 1/1/18, he obtained his bachelor's and master's degree in chemistry with 72% and 76% marks respectively. He also had 4 years of experience in the relevant field and was ready to be under probation for one year of the job. to what position he may be assigned
Consider the following statements concerning railways: 1. A level stretch equal to the maximum train length is to be provided between the gradient reaches where a rising gradient is followed by a falling gradient. 2. Vertical curves in railway tracks are not set out as parabolas. 3. Diamond crossings can be laid on curves also. 4. Curves should be avoided at the top level segment of bridges. Which of the above statements are correct?