Flexible concrete is a mix comprising of

Consider a soil sample, for which tests yield the following results:
Passing 75 micron sieve            62%
Liquid limit                                35%
Plasticity Index                          14%
As per the group index classification of soil, what is the soil condition of the above soil sample?

Consider the following statements regarding ductility of bitumen:
1. Ductility is the property which does not permit bitumen to undergo large deformation without breaking.
2. Bitumens with high ductility are generally adhesive but do not have good cementing properties.
3. Ductility must be ascertained at two different temperatures in order to pronounce on the suitability of the material.
Which of the above statements is/are correct?

What is the critical thickness of a prestressed concrete pavement (using Westergaard’s Corner Load Formula) to support a maximum wheel load of 4200 kg? Allow 10% for impact. Tyre pressure may be taken as 7 kg/cm². Assume flexural strength of concrete as 50 kg/cm², factor of safety as 2, subgrade reaction for plastic mix road as 6 kg/cm³, and modulus of elasticity as 3 × 105 kg/cm².

At a hydraulic jump, the flow depths are 0.4 m and 5 m at the upstream and downstream, respectively. The channel is wide rectangular. The discharge per unit width is nearly

Overspeed and delay studies on a preselected section of a Highway are conducted by

The surface tension of water at 20°C is 75 × 10^–3 N/m. The difference in water surface within and outside an open-ended capillary tube of 1mm internal bore, inserted at the water surface, would nearly, be

Survey of India was publishing toposheets using a scale of

The maximum speed of a train on B.G. track having a curvature of 3° and cant of 10 cm with allowable cant deficiency of 76 mm, for conditions obtaining in India, is

The gradient for a B.G railway line such that the grade resistance together with curve resistance due a 4° curve which will be equivalent to a simple ruling gradient of 1 in 150 is

A pelton wheel works under a head of 400m. Friction loss through the pipe flow is limited to 10%. The coefficient of velocity for the jet is 0.98. What is the velocity of the jet?
Take g = 10 m/s².

The value of porosity of a soil sample in which the total volume of soil grains is equal to twice the total volume of voids would be

A solid cylinder of length H, diameter D and of relative density S floats in neutral equilibrium in water with its axis vertical. What is the ratio of H to D if S = 0.6?

In a two-dimensional flow, with its stream function  = 2xy, the velocity at a point (3,4) is

An open rectangular tank of dimensions 4m×3m×2m contains water to a height of 1.6m. It is then accelerated along the longer side. What is the maximum acceleration possible without spilling the water? If this acceleration is then increased by 10%, what amount of water will be spilt off?

While conducting the flow measurement using a triangular notch, an error of +2% in head over the notch is observed. The percentage error in the computed discharge would be

An orifice is located in the side of a tank with its centre 10 cm above the base of the tank. The constant water level is 1.0 m above the centre of orifice. The coefficient of velocity is 0.98. On the issuing jet, the horizontal distance from the vena-contracta to where the jet is 10 cm below vena-contracta is

The velocity of water at the outer edge of a 60cm diameter whirlpool, where the water level is horizontal is 2.5 m/s. The velocity of water at a level where the diameter of the whirlpool is 15 cm, is

In a trapezoidal channel with bed width of 2m, and side slopes of 2V on 1H, critical flow occurs at a depth of 1m. What will be the quantity of flow and the flow velocity?
Take g as 10m/s².

A 7.5 m wide rectangular channel conveys 12 m³/s of water with a velocity of 1.5 m/s. The specific energy head of the flow is

The sequent depth ratio in a hydraulic jump formed in a rectangular horizontal channel is 10. The Froude number of the supercritical flow is

A partially open sluice gate discharges water at 6 m/s with a depth of 40 cm in a rectangular horizontal channel of width 5 m. What would be the post-jump depth of flow on the downstream of the gate by taking g as 10 m/s²?

What is the maximum power available at the downstream end of a pipeline 3 km long, 20 cm in diameter, if water enters at the upstream end at a pressure of 720 m of water, with the taking pipe friction coefficient as 0.03 and g as 10m/s²?

In the design of pipeline the usual practice is to assume that due to aging of pipelines:
1. The effective roughness increases linearly with time
2. The friction factor increases linearly with time 3. The flow through the pipe becomes linearly lesser with time.
Which of the above statements is/are correct? 

Consider the following statements:
1. In flow through hydro-dynamically smooth pipes, the friction factor f is always a constant. In flow through hydro-dynamically smooth pipes, the friction factor f is always a function of the flow Reynolds number.
3. In a fully developed rough turbulent pipe flow, the friction factor f is a function of relative roughness only.
4. In a fully developed rough turbulent pipe flow, the friction factor f is a function of the flow Reynolds number and relative roughness.
Which of the above statements are correct? 

Consider the following statements:
1. IS 3583 refers to Burnt Clay Paving Bricks.
2. IS 5779 refers to Burnt Clay Soling Bricks.
3. IS 3952 refers to Burnt Clay Hollow Bricks.
4. IS 2222 refers to Burnt Clay Lay Bricks.
Which of the above statements are correct?

Consider the following statements:
1. A high aggregate impact value indicates strong aggregates.
2. A low aggregate crushing value indicates high crushing strength of aggregates.
3. Aggregates having elongation index values greater than 15% are generally considered suitable for pavement construction.
4. Flakiness index of aggregates should not be less than 25% for use in road construction.
Which of the above statements are correct?

Consider the following statements regarding refractory bricks in furnaces:
1. The furnace is fired at temperatures more than 1700°C.
2. Silica content in the soil should be less than 40%.
3. Water absorption of bricks should not exceed 10%
4. Chrome bricks are known as basic bricks. Which of the above statements are correct?

Consider the following statements about lime:
1. Calcination of limestone results in quick lime.
2. Lime produced from pure variety of chalk is hydraulic lime.
3. Hydrated lime is obtained by treating quick lime with water.
Which of the above statements are correct?

Consider the following statements:
1. If more water is added to concrete for increasing its workability, it results into concrete of low strength.
2. No slump is an indication of a good workable concrete.
3. Higher the slump of concrete, lower will be its workability.
4. Workability of concrete is affected by water content as well as water-cement ratio.
Which of the above statements are correct?

Pozzolana used as an admixture in concrete has the following advantages:
1. It improves workability with lesser amount of water.
2. It increases the heat of hydration and so lets the concrete set quickly.
3. It increases the resistance of concrete to attack by salts and sulphates.
4. It leaches out calcium hydroxide.
Select the correct answer using the codes given below:

Consider the following statements regarding Cyclopean Concrete:
1. Size of aggregate is more than 150 mm.
2. Size of aggregate is less than 150 mm.
3. High slump.
4. High temperature rise due to heat of hydration.
Which of the above statements are correct?

A chain, working a crane, has sectional area of 625 mm² and transmits a load of 10 kN. When the load is being lowered at a uniform rate of 40 m/min, the chain gets jammed suddenly at which time the length of the chain unwound is 10m. Assuming E = 200 GPa, the stress induced in the chain due to this sudden jamming is

In mild steel specimens subjected to tensile test cycle, the elastic limit in tension is raised and the elastic limit in compression is lowered, This is called

Consider the following statements :
1. The shear stress distribution across the section of a circular shaft subjected to twisting varies parabolically.
2. The shear stress at the centre of a circular shaft under twisting moment is zero
3. The shear stress at the extreme fibres of a circular shaft under twisting moment is maximum.
Which of the above statements is/are correct?

The span of a cantilever beam is 2m. The cross-section of the beam is a hollow square with external sides 100 mm; and its 1 = 4 × 105 mm⁴. The safe bending stress for the beam material is 100 N/mm². The safe concentrated load at the free end would be

Consider the following statements in respect of arched construction made of voussoirs:
1. The superimposed load is transferred to the sidewalls only by the strength of cohesion of the mortar between the voussoirs.
2. The arch may fail under crushing when the compressive stress or thrust in it exceeds the safe crushing strength of the voussoir material.
3. Every element in the arch is subjected to compression only.
4. Failure of the arch due to the sliding of any voussoir past the adjacent one due to transverse shear can be avoided by reducing the height of the voussoirs.
Which of the above statements are correct?

Which of the following are examples of indeterminate structures?
1. Fixed beam
2. Continuous beam
3. Two-hinged arch
4. Beam overhanging on both sides
Select the correct answer using the codes given below:

A cantilever beam, 3m long, carries a uniformly distributed load over the entire length. If the slope at the free end is 1°, the deflection at the free end is

The maximum bending moment at a given section, in which a train of wheel loads moves occurs when the average load on the left segment is
1. Equal to the average load on the right segment.
2. More than the average load on the right segment.
3. Less than the average load on the right segment.
Select the correct answer using the codes given below:

A single degree of freedom system of mass 22 kg and stiffness 17 kN/m vibrates freely. If damping in the system is 2%, the cyclic frequency and the damped circular frequency, respectively, are nearly

A cable of insignificant weight, 18 m long, is supported at its two ends, 16m apart, at the same level. The cable supports at its mid-reach a load of 120 N. The tension in the cable is nearly

The design strength of a tension member is governed by
1. Rupture at a critical section
2. Yielding of gross area
3. Block shear of end region
Select the correct answer using the codes given below:

A beam-column is alternately bent either (1) in single curvature, or (2) in double curvature. The secondary moments induced are to be compared. These are indicated SM₁ and SM₂ as per the conditions (1) and (2) respectively

Gantry girders can be designed
1. As laterally supported beams.
2. As laterally unsupported beams.
3. By using channel sections.
Select the correct answer using the codes given below:

A three-hinged parabolic arch ABC has a span of 20 m and a central rise of 4·0 m. The arch has hinges at the ends and at the crown. A train of two point loads of 20 kN and 10 kN, 5 m apart, crosses this arch from left to right, with the 20 kN load leading. The maximum thrust induced at the supports is

According to IS : 875 Part 3, the design wind speed acting on industrial roof is estimated based on the basic wind speed by multiplying it by factors K₁,K₂ andK₃, where K₁ is called

Consider the following two statements regarding Bearing stiffeners provided at the location of a concentrated load:
1. Bearing stiffeners have to resist bearing and buckling loads.
2. Bearing area and the area resisting buckling load are the same.
Which of the above statements is/are correct?

In a plate girder, the web plate is connected to the flange plates by fillet welding. The size of the fillet welds is designed to safely resist

A certain R.C. short column with 300 mm square cross-section is made of M 20 grade concrete and has 4 numbers, 20 mm diameter, longitudinal bars of Fe 415 grade steel. It is under the action of a concentric axial compressive load. Ignoring the reduction in the area of concrete due to the steel bars, the ultimate axial load carrying capacity of the column as by the relevant code is

A rectangular beam of size 230 mm × 350 mm beam is (effective depth). The factored shear force acting at a section is 80 kN. If the permissible shear stress in concrete is 0·25 MPa, the design shear force is nearly

In a combined footing for two columns carrying unequal loads, the maximum hogging moment occurs at

Consider the following statements:
1. The minimum steel requirements of slabs are based on considerations of shrinkage and temperature effects alone, and not on strength.
2. Providing excessive reinforcement in beams can result in congestion, thereby adversely affecting the proper placement and compaction of concrete.
Which of the above statements is/are correct?

A T-beam becomes identical to a rectangular beam with width equal to its flange width when the neutral axis is

Consider the following statements in the light of IS : 456 - 2000 :
1. There is an upper limit on the nominal shear stress in beams (even with shear reinforcement) due to the possibility of crushing of concrete in diagonal compression.
2. A rectangular concrete slab whose length is equal to its width may not be a two-way slab for certain definable support conditions.
Which of the above statements is/are correct?

A simply supported prestressed concrete beam is of 25m span. The initial stress is 1000 MPA. The slip in the jack during tensioning has been 2mm. If E_S = 200 GPa, the loss of prestress due to anchorage slip is

Which of the following measures are relevantly considered for earthquake loading and lateral stability of tall buildings?
1. Minimizing gravity loads
2. Adding masses at floor levels
3. Ensuring ductility at the locations of maximum moments
4. Providing shear walls
5. Providing basement
Select the correct answer using the code given below:

Which of the following statements is/are correct for a non-critical activity?
1. It demands very special attention and action.
2. One can do with normal attention to this activity with some leeway for action.
Select the correct answer using the codes given below:

Consider the following statements regarding tendering for a civil work:
1. Earnest money deposit (EMD) is a prerequisite to tender for a work.
2. It is not essential to call for the contractor’s credentials when a tender is invited.Which of the above statements is/are correct?

Consider the following statements regarding quality control:
1. It refers to absolute conformity to specifications.
2. It may not vouch against overspending.
3. It may unknowingly resort to overdesign in the hope of risk minimization.
4. It is intended to reduce maintenance costs.
Which of the above statements are correct?

Which of the following statements are correct?
1. Depression of mercury in a capillary tube is dependent on density and surface tension.
2. Modeling of flow-induced drag on a ship is done invoking both of Froude number 30. and Reynolds number.
3. Flow of a fluid in a narrow pipe is relatable to both Reynolds number and Cauchy number.
4. Formation and collapse of a soap bubble is analyzed through employing surface tension and external pressure.
5. Flow over the downstream slope of an ogee spillway can be affected by surface tension.
Select the correct answer using the codes given below:

Consider the following statements regarding flow net:
1. It helps determine the quantity of seepage.
2. It helps determine the upward lift below a hydraulic structure.
3. It is applicable to rotational flow only.
Which of the above statements are correct?

Hydraulic jump forms in a horizontal rectangular channel carrying a unit discharge of 1.019 m³/sec/m at a depth of 101.9 mm. This jump is classified as

A man, 65 kg, descends to the ground with the help of a parachute, 18 kg. The parachute is hemispherical in shape, 2m diameter. Density of air can be taken as 0.00125 g/cm³ and its kinematic viscosity as 0.15 stoke. What is the terminal velocity of the parachute? (Take C_D = 1.5 and g = 1000 cm/sec²)

In a wide rectangular channel, the normal depth is increased by 20%. This would mean an increase in the discharge of the channel nearly by

At a sluice gate across a rectangular channel, the upstream flow conditions are: depth of 2.0 m; velocity of flow of 1.25 m/sec. The flow conditions at the vena contract just downstream of the gate can be taken as: depth of 0.44 m; velocity of flow of 5.68 m/sec. What is the total thrust on the gate on its upstream face (to the nearest 10 units)?

Consider the following statements regarding a turbine:
1. Specific speed plays an important role in the selection of the type of turbine.
2. An increase in specific speed of the turbine is accompanied by higher maximum efficiency.
3. The runner of too high specific speed with high available head increases the cost of the turbine on account of the high mechanical strength required.
Which of the above statements are correct?

In a hydraulic machine, the moment of momentum of water is reduced by 15915 N.m, when the machine is rotating at 600 rpm. The power developed is

Consider the following statements in connection with hydraulic turbines:
1. The Kaplan turbine is a radial flow turbine in which the guide vane angles as well as the runner vane angles are adjustable.2. Francis and Kaplan turbines are provided with draft tubes which carry water from exit of runner to tail water to increase the gross-head across the turbine.
3. The parts of turbines susceptible to cavitation are the guide vanes and runner vanes — drastically reducing the turbine efficiency.
4. The specific speed of a 4-jet Pelton turbine will be 28 if the specific speed of a single-jet Pelton turbine is 14.
Which of the above statements are correct?

Consider the following statements:
1. Surge tanks are not substitutes for forebays.
2. Pumped storage power plants are a boon to power generation.
3. Water hammer in penstocks is not dangerous.
4. Kaplan turbines are used in low head power plants.
Which of the above statements are correct?

In the standard SCS-CN method of modelling runoff due to daily rainfall, if CN = 75, the runoff magnitude for a one-day rainfall of 100 mm is nearly

Consider the following statements concerning precipitation:
1. The Isohyetal map method of determining the average precipitation is considered to be better than the Thiessen method.
2. There is no possibility of damaging the storms because of cloud seeding activity.
3. Water that percolates through the soil emerges as the dry weather flow in streams.
Which of the above statements are correct?

The probability of a 10-year flood to occur at least once in the next 4 years is

Tortuosity of a meandering river is the ratio of

Consider the following statements in respect of ground water aquifers:
1. Specific storage is specific capacity per unit depth of the aquifer.
2. Specific capacity is storage coefficient per unit aquifer depth.
3. Specific capacity is a constant for a given well.
4. For one-dimensional flow in a confined aquifer between two water bodies, the piezometric head line in the aquifer is a straight line.
Which of the above statements are correct?