The water level in a vertical cylinderical tank with open top,is to be raised by 6 m from a near by reservoir.Then the cost of pumping through B will be
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Solution
Cost of pumping ∝ Work done per second in pumping
For B its γQ6.
For A its γQ3 as avg. static head will be 3m.
So cost of pumping through B is twice that of A.
The velocity distribution in two dimensional duct is shown in the figure. The value of momentum correction factor will be ________.
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Solution
A large scale bearing capacity test on a footing of diameter 0.6 m at a depth of 1.5 m yielded an ultimate value of 140 KN.Unconfined compression tests on the soft saturated clay yielded a strength of 150 KN/m2
. If the unit weight of soil is 20 KN/m3. How much the test value differ from that obtained using Terzaghi’s bearing capacity equation? _______%.
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Solution
Which of the following statement is correct.
1.Newmark’s chart is based on Boussineq’s equation while fenske’s chart is based on westergaard’s equation.
2.Vertical stress calculated below a point closure to the point of application of load is greater if calculated from westergaard’s analysis than from Boussineq’s equation.
3.Newmark’s chart is used to compute vertical stress due to uniformly loaded area of any regular shape only below any point inside or outside.
4.Newmark chart can also be used to compute horizontal and shear stress due to uniformly loaded area of any shape below any point inside or outside the loaded area.
A 40° slope is excavated to a depth of 8 m in a deep layer of saturated clay (C = 70 KN/m2 and φ= 0, γ= 29 KN/m3). The factor of safety for the trial failure surface shown in figure is________.
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Solution
A square footing of dimension 3m × 3m is accompanying a square column at its centre 0.45 × 0.45 m which carries service load of 2300KN. Assume bearing capacity of soil to be 300 KN/m2 at 1.5 m below ground level. If two way shear predominates in the design of thickness of footing. Then considering M20 grade concrete and Fe-415 grade steel.The minimum thickness of footing will be
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Solution
Match List I and List II and select the correct answer using the codes given below the lists.
List I (Use) | List II (Types of weld) |
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A.Structural members subjected to direct compression or tension | 1.Slot weld |
B.A hole is made in one of the components and welding is done around the periphery of the hole. | 2.Seam weld |
C.Pressure is applied continuously | 3.Fillet weld |
D.Joining two surfaces approximately at right angles to each other | 4.Plug weld |
5.Butt weld |
A fixed beam of span L carries a uniformly distributed load W (total) on the left half of the portion.The value of W at the time of collapse is \(K\frac{Mp}{\iota }\) where K is ______
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Solution
Chlorine gas used for disinfection combines with water to form hypo-chlorus acid (HOCl). The HOCl ionizes to form hypochlorite (OCl–) in a reversible reaction.
HOCl \(\rightleftharpoons\) H+ + OCl– K = 2.7 × 10–8 at 20°C
the equilibrium of which is governed by pH. If the 80%fraction of HOCl in the free chlorine residue is available the pH value will be ________.
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Solution
Stiffness matrix of the frame shown below is
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Solution