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Civil Engineering
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The impurity of mixing water which affects the setting time and strength of concrete, is
sodium carbonates and bicarbonates
calcium bicarbonates
sodium chlorides
calcium chorides
sodium sulphates
The inspection pit or chamber is a manhole provided in a base drainage system
at every change of gradient
at every change of direction
at the point where vertical soil pipe joins the house drain
at every 30 m intervals
All the above.
Stones used for ornamental work must be
Light
soft
heavy.
Hard
The ratio of the span L of the filler joists to the depth d from the under side of the joist to the top of the structural concrete, should not exceed
20
60
35
45
25
The design period of sewage treatment works in normally
5 - 10 years
15 - 20 years
40 - 50 years.
30 - 40 years
Growth of population can be conveniently represented by
an arithmetical curve
a logistic curve
a straight line curve
a semi-logarithmic curve
All the above.
While applying the Bernoulli's equation = total head, the work any section done on the flow system, if any
is added on the left side of the equation
None of these.
is ignored
is added on the right side of the equation
A stratum of clay 2 m thick will get consolidated 80% in 10years.
For the 80% consolidation of 8 m thick stratum of the same clay, the time required is
160 years
100 years
140 years
120 years
180 years.
The force in the member DE of the truss shown in the below figure is,
35.5 kN
Zero
25.0 kN
100.0 kN
In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing strength
100 kg/cm2
500 kg/cm2
400 kg/cm2
200 kg/cm2
300 kg/cm2
If a soil undergoes a change in shape and volume by application of external loads over it, but recovers its shape and volume immediately after removal of the load, the property of the soil is said to be
Elasticity of soils
None of these.
Resilience of soils
Compressibility of soils
In septic tanks,
the inlet is kept 30 cm below the sewage line and outlet is kept at a level 40% depth of the sewage
the clear space between the baffle top and covering slab is about 7.5 cm
the baffles or tees are extended up to top level of scum
free board of 0.3 m may be provided
All the above.
On which one of the following concepts is the basic principle of structural design based
Strong column and weak beam
Partial weak column-beam
Equally strong column-beam
Weak column strong beam
Border Roads Organisation for hilly regions, was formed in
1958
1960
1954
1962
1947
Consider the following statements :1. An ascending gradient of 1 in 100 meets an ascending gradient of 1 in 120 to form a Valleycurve.
2. A falling gradient of 1 in 25 meets a falling gradient of 1 in 50 to form a summitcurve.
3. The length of summit curve is determined on the basis of head light sightdistance.
Which one of the statements given above is/are correct
1 and 3
2 only
2 and 3
1 and 2
Consider the following statements :1. Butterfly valve is used for throttling and controlling flowrate.
2. Check valve is used in the discharge piping of apump.
3. Air-relief valve is placed in the pipeline at the valleys to automatically vent the accumulated air in thesystem4.
Altitude valve is provided in user overheadtank.
Which of the statements given above are correct
1, 2 and 3 only
1 and 2 only
1, 2 and 4 only
3 and 4 only
The steel pile which is generally sunk in soft clay or loose sand of low bearing capacity, is
screw pile
pipe pile
H-pile
None of these.
disc pile
If α is switch angle and R is radius of the turnout, the length of the tongue rail, is
R cos α/2
R tan α/2
R sin α
R tan α
R sin α/2
A reinforced concrete beam is designed for the limit states of collapse in flexure ashear.
Which of the following limit states of serviceability have to be checked ? 1. Deflection 2. Cracking 3. Durability Select the correct answer using the codes given below
2 and 3
1, 2 and 3
1 and 2
1 alone
The stone ware sewers
are generally provided with a water proof cover by vaporising sodium chloride
All the above.
are manufactured from clays and shales
after casting are dried and burnt at temperature 150°C, 700°C and 1200°C
are used for carrying sewage and drainage from houses
If intensity of rainfall in cm per hour is I, percentage coefficient of run-off is P, area of catchment in square kilometres is A, the total run-off Q, is given by
Q = 2.758 x 102 x API
Q = 2.758 x 103 x API
Q = 1.758 x 102 x API
Workability of concrete for a given water content is good if the aggregates, are
angular aggregate
rounded aggregate
irregular aggregate
flaky aggregates.
In plastic analysis, the shape factor for circular sections, is
1.5
1.6
None of these.
1.697
A stepped notch is a combination of
rectangular notches of different sizes
rectangular and triangular notches
All the above.
triangular notches of different sizes
Minimum thickness of a layer of fine sand required to cut off capillary rise of water completely, should be
64 cm
76 cm
80 cm
52 cm
40 cm
X-component of velocity in a 2-D incompressible flow is given by u = y2 + 4 xy. If Y-com-ponent of velocity 'v' equals zero at y = 0, the expression for 'v' is given by
-2y2
4y
2y2
2xy
135 litres of water per person per day, is provided in
nurses homes
residential schools
hostels
All the above.
Sand drains are used to
reduce the settlement
accelerate the consolidation
transfer the load
increase the permeability
For stability analysis of slopes of purely cohesive soils, the critical centre is taken to lie at the intersection of
the perpendicular drawn at two-third slope from the toe and the locus of the centre
directional angles
the perpendicular drawn at one-third slope from the toe and the locus of the centre
the perpendicular bisector of the slope and the locus of the centre
If 1500 g of water is required to have a cement paste 1875 g of normal consistency, the percentage of water is,
40%
35%
20%
30%
25%
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