Two identical centrifugal pumps are connected in parallel to a common delivery pipe of a system. The pump curve of each of the pumps is represented by H = 20 – 60Q² where H is manometric head of the pump and Q is the discharge of the pump. The head loss equation when two such fully-similar pumps jointly deliver the same discharge Q will be

At the point of operation with maximum efficiency, a turbine indicated unit power of 12 units and unit speed of 98 units and operates with 3300 kgf/s of flow. What are the speed in rpm and the specific speed of the machine respectively when its design head is 8.5m?

A hydraulic turbine develops 8000 kW when running at 300 rpm under a head of 45 m. the speed of the same turbine under a head of 60m is

Consider the following statements:
1. In an Impulse turbine, the pressure of the, flowing water remains unchanged and is equal to atmospheric pressure.
2. In Impulse turbines, the water impinges on the buckets with ‘pressure energy’.
3. In a Reaction turbine, the pressure of the, flowing water remains unchanged and is equal to atmospheric pressure.
Which of the above statements is/are  correct?

A Pelton wheel with single jet rotates at 600 rmp. The velocity of the jet from the nozzle is 100 m/s. If the ratio of the bucket velocity of jet velocity is 0.44 and the speed ratio is 0.43, what is the coefficient of velocity of the nozzle?

In a single-acting reciprocating pump, the acceleration head at the beginning of the suction stroke is 3.5m. If the pump is 1.5m below the water level in the supply reservoir, the pressure head at the cylinder reservoir, the pressure head at the cylinder at that instant, considering the atmospheric pressure as 10.0m is

A tank is 1.8m deep and square length of 4.5m at the top and square length of 3m at the bottom. The four sides are plane and each has the same trapezoidal shape. The tank is completely full of oil weighing 936kg/m³. What is the resultant pressure on each side?

Over a basin of area 333 km², there was a storm for 6 h with a uniform intensity of 2 cm/ h. The observed runoff was 20×10⁶ m³. the average rate of infiltration for the basin was

International Traffic Intelligent Survey Data are related with

A peak flow of a flood hydrograph due to a six-hour storm is 470m³/s. The corresponding average depth of rainfall is 8 cm. Assume an infiltration loss of 0.25 cm/hour and a constant base flow of 15m³/s. What is the peak discharge of 6 hour unit hydrograph for this catchment?

A new reservoir has a capacity of 12 Mm³ and its catchment area is 400 km². The annual sediment yield from this catchment is 0.1 ha. m/ km² and the trap efficiency can be assumed constant at 90%. The number of years it takes for the reservoir to lose 50% of its initial capacity is, nearly

Cavitation is likely to occur if
1. Pressure becomes very high
2. Temperature becomes low
3. Pressure at the specific points falls below vapour pressure
4. Energy is released with the onset of a high intensity wave due to noise and vibration of the machine.
Which of the above statements are correct?

Which of the following statements are correct as regards aquifer characteristics?
1. The storage coefficient is the volume of water released from storage from the entire aquifer due to unit depression of peizometric head.
2. The storage coefficient is the same as the specific yield for water table aquifer.
3. Both the aquifer constants, viz. storage coefficient S and Transmissivity T are dimensionless numbers. 

The conditions to be satisfied for a channel in ‘Regime’ as per Lacey are
1. Constant discharge
2. Silt grade and silt concentration are constant 3. The channel is flowing in unlimited incoherent alluvium of the same alluvial character as that transported.
Which of the above statements are correct?

Consider the following statements related to uplift pressure in gravity dams:
1. A drainage gallery reduces the uplift pressure at all levels below the gallery.
2. A drainage gallery below upstream water level reduces the uplift pressure at all levels below the upstream water level.
3. A grout curtain near the heel reduces seepage and uplift pressure everywhere on the gravity dam whatever the upstream water level. Which of the above statements are correct? 

A 20 m long horizontal concrete floor under a barrage on a permeable foundation retains a 5m head of water and has a 5 m deep downstream end pile. The exit gradient is

Electrical conductivity (EC) of water and total dissolved solids (TDS) are relatable as:
The value of EC will

Consider the following properties of fluorine:
1. It is a member of the halogen family
2. It is a greenish yellow diatomic gas
3. Chlorine, iodine, bromine and Helium are members of the halogen family.
4. Even fireproof of asbestos burns in the ambience of fluorine.
Which of the above are correct?

The following are certain operating problems of a rapid sand filter:
1. Sand depth should never be depleted by more than 10 cm.
2. Air binding results due to development of negative head and formation of air bubbles in the filter sand.
3. Water softening with lime-soda leads to incrustation of sand.
4. Bumping of filter bed is caused due to negative head.
Which of the above statements are correct?

Consider the following characteristics of E.Coli bacteria:
1. Gram negative
2. Spore-forming
3. Facultative anaerobic
4. Bacillus
Which of the above are correct?:

How much bleaching powder is needed to chlorinate 5000l of water whose chlorine demand is 2 mg/l, assuming that the bleaching powder has 25% available chlorine?

Which technique of stabilization for the sub-base is preferred for a heavy plastic soil?

A fill having volume of 150000 m³ is to be constructed at a void ratio of 0.8. The borrow pit solid has a void ratio of 1.4. The volume of soil required to be excavated from the borrow pit will be

Consider the following assumptions as regards field permeability test:
1. The flow is laminar and Darcy’s law is valid.
2. The flow is horizontal and uniform at all the points in the vertical section.
3. The velocity of flow is proportional to the ‘tangent magnitude’ of the hydraulic gradient.
Which of the above assumptions are correct?

In a three-layered soil system, the thicknesses of the top and bottom layers each are half the thickness of the middle layer. The coefficients of permeability of the top and bottom layers each are double the coefficient of permeability k of the middle layer. When horizontal flow occurs, the equivalent coefficient of permeability of the system will be

A uniform collapsible sand stratum, 2.5 m thick, has specific gravity of its sand as 2.65, with a natural void ratio of 0.65. The hydraulic head required to cause quick collapsible sand condition is

The ratio of dry unit weight to unit weight of water represents

Proctor’s compaction test for the maximum dry density of a certain soil gave the results as: 1.77 gm/cc and OMC 14.44%. The specific gravity of the clay soil grain was 2.66. What was the saturation degree for this soil?

What is Highway Engineering ?

In a certain sea shore, the height of a retaining wall with smooth vertical back is 4.4 m. The foundation is over an expansive collapsible soil and has horizontal surface at the level of the top of the wall and carries a udl of 197 kPa. The unit weight and angle of internal friction are 19 kN/m³ and 30°, respectively. What is the nearest magnitude of the total active pressure per metre length of this sea shore wall?

Which of the following statements are rightly associated with the laws of weights in the theory of errors?
1. If an equation is multiplied by its own weight, then the weight of the resulting equation is equal to the reciprocal of the weight of the original equation.
2. The weight of the algebraic sum of two or more quantities is equal to the reciprocal of the sum of the individual weights.
3. If the quantity of a given weight is multiplied with a factor, then the weight of the resulting quantity is obtained by dividing the original weight by the square root of that factor.
4. If the quantity of a given weight is divided by a factor, then the weight of the resulting quantity is obtained by multiplying the original weight by the square of that factor.

The magnetic bearing of a line (on full-circle mensuration basis) is 55° 30’ East. The true magnetic bearing of the line will be.

In any closed traverse, if the survey work is error free, then
1. The algebraic sum of all the latitudes should be equal to zero.
2. The algebraic sum of all the departures should be equal to zero.
3. The sum of the northings should be equal to the sum of the southings.
Which of the above statements are correct?

The rise and fall method for obtaining the reduced levels of points provides a check on
1. Foresight
2. Backsight
3. Intermediate sight
Which of the above statements are correct?

Turning of the theodolite telescope in vertical plane by 180° about the horizontal axis is known as

Which of the following are among the fundamental lines of a theodolite?
1. The vertical and horizontal axes
2. The lines of collimation and axis of the plate levels.
3. The bubble line of the altitude level

The velocity distribution in the boundary layer is given by   where u is the velocity at adistance of y from the boundary and  = U at y =  𝛿,  being boundary layer thickness. Then the value of momentum thickness will be

The standard plasticity chart by Casagrande to classify fine-grained soils is shown in the figure.

The area marked P represents.

A collapsible soil sub-grade sample was tested using Standard California Bearing Ratio apparatus; and the observations are given below

Sl.No.	Load	Penetration
1. 2.	60.55 kg 80.55 kg	2.5 mm 5.0 mm

Taking the standard assumption regarding the load penetration curve, CBR value of the sample will be taken as

A fluid flow is described by a velocity field . What is the absolute velocity (in magnitude) at the point (2,2,1)?

Consider the following statements :
1. There will be no defects in select grade timbers.
2. The codal values for strength of grade-II timer without defects may be reduced by 37.5%.
3. For timber used as columns, the permissible stress in ungraded timbers is adopted with a multiplying factor of 0.50.
4. In case of wind force and earthquakes, a modification factor of 1.33 is adopted. Which of the above statements are correct ? 

Consider the following statements regarding timber :
1. The strength of timber increases by Kiln seasoning.
 2. Cutting of wood is to be done prior to treatment.
3. Water seasoning is good for prevention of warping.
4. ASCU treatment enhances the strength of wood. Which of the above statements are correct ?

Gase(s) emitted during rotting or decomposition of timber is /are mainly

Efflorescence of bricks is due to

Disintegration of bricks masonry walls is primarily due to
1. Efflorescence
2. Magnesium sulphate in brick  
3. Calcined clay admixtures
4. Kankar nodules
Which of the a above statements are correct ? 

Consider the following test :
1. Transverse strength test
2. Water absorption test
3. Impact test
4. Breaking strength test
Which of the above are relevant to testing of tiles ?

Which of the following statements is/are correct regarding the strength of cement ?
1. Particle sizes less than 3 m increases the viscous nature of the cement.
2. Finer particles in cement can be replaced by fly-ash to improve the strength.

The constituent compound in Portland cement which reacts immediately with water, and also sets earliest, is

Which of the following statements are correct with regard to cement mortar ?
1. Workability of cement mortar can be improved by addition of lime.
2. Fly-ash cement is economical in plastering jobs.
3. Addition of saw dust improves workability.
4. Sand in mortar can be replaced by finely crushed fire bricks.

In a concrete mix of proportion 1 : 3 : 6, the actual quantity of sand, which is judged to have undergone 15% bulking, per unit volume of cement, will be

Which method of curing of concrete is recommendable for rapid gain of strength of concrete ?

Which of the following is appropriate as  simple field method for assesing consistency of concrete ?

Which of the following are relatable to Autoclaved Aerated Concrete ?
1. Light weight
2. Strong
3 Inorganic
4. Nontoxic

The workability of concrete becomes more reliable depending on
1. Aggregate-cement ratio
2. Time of transit
3. Grading of the aggregate

Which of the following statements are correct for stresses acting on mutually perpendicular faces of a plane element ?
1. The sum of the normal stresses in mutually perpendicular planes is equal to the sum of the principal stresses.
2. The shearing stresses in two mutually perpendicular planes are equal in magnitude and direction.
3. Maximum shear stress is half of the difference between principal stresses.

Which of the following statements are correct?
1. Strain in the direction of applied stress is known as longitudinal strain.
2. Tensile stress results in tensile strain in linear and lateral directions.
3. Strains in all directions perpendicular to the applied stress are known as lateral strain. 4. Ratio of change in volume to original volume is known as volumetric strain.

In the cross-section of a timber, cambium layer can occur in

Consider the following statements :
1. In the infinitesimal strain theory, dilatation is taken as an invariant.
2. Dilatation is not proportional to the algebraic sum of all normal stresses.
3. The shearing modulus is always less than the elastic modulus.
Which of the above statements is/are correct ?

Which one of the following represents constitutive relationship ?

Principal stresses at a point are 80 N/mm² and 40 N/mm², both tensile. The yield stress in simple tension for this material is 200 N/mm². The values of factors of safety according to maximum principal stress theory and maximum shear stress theory, respectively, are

The principal stresses at a point are 2  (tensile) and  (compressive), and the stress at elastic limit for the material in simple tension is 210 N/mm². According to maximum shear strain theory, the value of  at failure is

Which of the following statements are correct ?
1. Cranes are employable in moving and/or hoisting loads.
2. With the use of dipper and stick, power shovels can be used as hoes.
3. Ovedrive for higher speeds is a facility often used comfortably in the working of a tractor.
4. Clam shells are less desirable than draglines if the material is water-saturated.

Two similar bars of Steel and Aluminium are heated to a same temperature. Forces are applied at the ends of the bars to maintain their lengths unaltered. If the  ratio of Young’s moduli of Steel and Aluminium is 3, and the ratio of the coefficients of thermal expansion of Steel to that of aluminium is 0.5, what is the stress on the Aluminium bar if the stress on the Steel bar is 100 MPa ?

A structural steel beam has an unsymmetrical I-cross-section. The overall depth of the beam is 200 mm. The flange stresses at the top and bottom are 120 N/mm² and 80 N/mm², respectively. The depth of the natural axis from the top of the beam will be

In the analysis of beams subjected to loads, the point with Nil Bending Moment can be a
1. Point of Contraflexure
2. Point of Maximum Shear Force
3. Point of Inflection
Which of the above statements is/are correct ?

A tractor has a permissible loaded speed of 200 m/minute, which can increase by 25% when the load is removed/deposited. Generally, it is operated at 80% of the permissible speed (loaded unloaded). It works at a location where haul distance is 120 m. Rest allowance per round-trip is taken as 50 seconds on an average. Fixed time per trip, for loading and unloading and turnaround, etc., is 30 seconds. What is its effective cycle time?

The purpose of lateral ties in a short RC column is to

When a two-hinged parabolic arch is subjected to a rise in ambient temperature, the horizontal thrust at the support will

In the slope-deflection equations, deformations are considered to be caused by

The maximum bending moment caused by a set of concentrated moving loads is

Force method of analysis of a structure is particularly preferred when
1. The degrees of freedom of the structure become large
2. The structure has less number of static, and more number of kinematic, indeterminacies
3. The structure has more numbers of static, and less numbers of kinematic, indeterminacies

Stiffness matrix method is the category of
1. Compatibility method
2. Displacement method
3. Force method
4. Equilibrium method

Muller-Breslau Principal for obtaining influence lines is applicable to
1. Statically determinate beams and frame
2. Statically indeterminate structures, the material of which is elastic, and follows Hooke’s law.
3. Any statically indeterminate structure

The plastic neutral axis
1. Divides the given section into two equal halves
2. Divides the given section into two unequal parts
3. Lies on the centroidal axis of the section

The plastic moment capacity MP is

Web crippling is caused by

The block shear failure of a bolted joint in tension occurs because of
1. Use of higher shear strength bolts
2. Use of paltes with higher bearing strength

As per IS code, the maximum longitudinal pitch allowed in bolted joints of tension members is nominally

ISMB 100 (r_x = 40 mm, r_y = 10 mm) has been used as a column in a industrial shed. Along the minor axis, the the column has restraints in the form of purlins at 1.0 m intervals. Effective length factor along major and minor axes are 1.2 and 1.0, respectively. If the slenderness ratio is restricted to 120, the maximum column height will be

As per IS 800 – 2007, the permitted slenderness ratio for a bracing member in case of hangers shall be

A rectangular beam of depth d is under bending. Load has been gradually increased when the top fibre has obtained five times the strain at the first yield. What depth of the beam will still respond by elastic conditions?

The ultimate moment capacity of a mild steel section is usually

The portal bracing in a truss-bridge is used to

Consider the following cases in the design of reinforced concrete members in flexure:
1. Over-reinforced section
2. Tension failure
3. Compression failure
4. Under-reinforced section
Which of the above cases are considered for safe design of R.C members in flexure?

The bond between steel and concrete is mainly due to
1. Mechanical resistance
2. Pure adhesive resistance
3. Frictional resistance

The carbonation process is demonstrated more by

When a sprially reinforced short column is loaded axially, the concrete inside the core is subjected to

In a reinforced concrete section, shear stress distribution is diagrammatically

As per IS 456 – 2000, the maximum permissible shear stress, T_Cmax' is based on

Footings shall be designed to sustain the
1. Applied loads
2. Moments and forces under relatable loading conditions
3. Induced reactions

Reinforced concrete slabs are designed for
1. Shear
2. Flexure
3. Positive bending moment
4. Negative bending moment

As compared to the working stress method of design, the limit state method of design premises that the concrete can admit

The bending stress in a T-beam section is maximum
1. At top fibre
2. At centroidal fibre
3. At bottom fibre

If the loading on a simply supported prestressed concrete beam is uniformly distributed, the centriod fo the pre-stressing tendon should be as

In a post-tension pre-stressed concrete beam, the end block zone is in between the end of the beam and the section where

In the pre-tensioning method
1. Tension in concrete is induced directly by external force
2. Tension is induced in the tendons before concreting
3. Concrete continues to be in tension after pre-stressing

Flexural collapse in over-reinforced beams is due to

If a beam is likely to fail due to high bonding stresses, then its bond strength can be increased most economically by

A single-acting reciprocating pump has a stroke of 25 cm, speed of 135 rpm, and a piston of 30 cm diameter. If its slip has been estimated as 4% at a particular operating condition, what isthe corresponding realized discharge through a height of 14 m?

In the design of pre-stressed concrete structures, which of the following limit states will qualilfy as the limit states of serviceability?
1. Flexural                     2. Shear
3. Deflection                 4. Cracking