QUESTIONS CARRY ONE MARK EACH.
The ratio of saturated unit weight too dry unit weight of a soil is 1.25. If the specific gravity of solids (Gs) is 2.56, the void ratio of the soil is __________.
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Solution
QUESTIONS CARRY ONE MARK EACH.
Consider the following statements : Collision diagram is used to
1.study accident pattern
2.eliminate accidents
3.determine remedial measures
4.make statistical analysis of accidents of these statements :
QUESTIONS CARRY ONE MARK EACH.
A horizontal confined aquifer of 10 m thickness and in finitea real extent lies with its top level 25 m below ground level.Static piezometric surface is 10 m below ground level.Dur-ing steady rate of pumpage from the well at 5000 m3/day,steady draw down at the well is 12 m. Permeability of aquifer formation is 48m/day. Assume the radius of influence as 500 m. The effective well diameter will be __________.
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Solution
QUESTIONS CARRY ONE MARK EACH.
An artesian tube well has a diameter of 20 cm. The thick-ness of aquifer is 30 m and its permeability is 36m/day.What will be its yield under a draw down of 4 m at the well face? Use radius of influence as recommended by Sichardt __________.
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Solution
QUESTIONS CARRY ONE MARK EACH.
An infinite soil slope with an inclination of 35° is subjected to seepage parallel to its surface. The soil has c’= 100 kN/m2 and φ’= 30°. Using the concept of mobilized cohesion and friction,at a factor of safety of 1.5 with respect to shear strength, the mobilized friction angle is __________.
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Solution
QUESTIONS CARRY ONE MARK EACH.
Compaction of an embankment is carried out in 500 mm thick layers. The hammer used for compaction has a foot area fo 0.05 sq. m and the energy imparted in every drop of hammer is 400 Nm. Assuming 50%more energy in each pass over the compacted are adue to overlap, the number of passes required to develop compactive energy equiva-lent ot Indian Standard light compaction for each layer would be __________.
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Solution
QUESTIONS CARRY ONE MARK EACH.
The following steps are involved in making a spigot and socket joint of cast iron pipes used in water supply sys-tems :1.Tarred gasket or hemp yarn in wrapped around the spigot.2.The sip got end is centered in to the socket end of the preceding pipe.3.A joining ring end is placed around the barrel and against the face of the socket.4.The gasket or hemp yarn in caulked slightly.5.Molten pig lead is poured and then caulked.The correct sequence of these steps is
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Solution
QUESTIONS CARRY ONE MARK EACH.
A thin smooth piate 1 m wide and 2 m long is towed through water at a velocity of 2 m/s.assuming that boundary re-mains laminar (kinematic viscosity = 10–6 m2/s), drag on both sides of the plate is __________.
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Solution
QUESTIONS CARRY ONE MARK EACH.
The focal length of the object glan of a tacheometer is 200mm, the distance between the vertical axis of the techeometer and the optical centre of glan is 100 mm and the spacing between the upper and lower line of the diaphragm axis is 1m, 2 and 3m. With the line collimation perfectly horizontal.The horizontal distance (m) between staff and instrument station is
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Solution
Staff intercept, S = 3 –1 =2 m
Stardia intercept, i = 4 mm
focal length, f = 200 mm
Distance from vertical axis to centre of objective, d =100 mm
Horizontal distance from instrument to staff station
f⁄i(s)+(f+d)
=\(\frac{200}{4}(2)+(0.2+0.1)\)
= 100.3 m
QUESTIONS CARRY ONE MARK EACH.
The point P & Q located on a map has the following coordinates
Latitude +40 m + 20 m
Departure–20 m +30 m
The length of PQ is
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Solution
Length of PQ =\(\sqrt{(40-20)^{2}+(-20-30)^{2}}\)
≅ 53.83m