41501. In an iceberg, 15% of the volume projects above the sea surface. If the specific weight of sea water is 10.5 kN/m3 , the specific weight of iceberg ir kN/m3 is
41502. A reinforced concrete column contains longitudinal steel equal to 1 percent of net cross-sectional area of the column. Assume modular ratio as 10. The loads carried (using the elastic theory) by the longitudinal steel and the net area of concrete, are Ps and Pc respectively. The ratio Ps/Pc expressed as percent is
41503. A steady discharge of 1 cumec flows uniformly in a rectangular channel 1 m wide at a depth of 250 mm. The slope of the channel bed is :
41504. In reinforced concrete, pedestal is defined as compression member, whose effective length does not exceed its least dimension by
41505. Flexible pavements derive stability primarily from :
41506. The permissible bending tensile stress in concrete for the vertical wall of an R.C. water tank made of M 25 concrete is :
41507. The cylinder strength of the concrete is less than the cube strength because of
41508. A water treatment plant is required to process 28800 m3/d of raw water (density = 1000 kg/m3, kinematic viscosity = 10-6 m2/s). The rapid mixing tank imparts tank a velocity gradient of 900s-1 to blend 35 mg/l of alum with the flow for a detention time of 2 minutes. The power input (W) required for rapid mixing is
41509. A single rapid test to determine the pollu-tional status of river water is :
41510. Vane tester is normally used for determining in situ shear strength of :
41511. For the frame shown in the below figure, the maximum bending moment in the column is,
41512. In a compaction test, as the compaction effort is increased, the optimum moisture content
41513. The peak discharge of the instantaneous unit hydrograph of a basin, when compared to the peak discharge of a 4-hour unit hydrograph of that basin, would be
41514. The drop manholes are provided in a sewerage system when there is
41515. The reaction time for calculation of stopping distance may be assumed as
41516. The percentage error in the computed discharge over a triangular notch corresponding to an error of 1% in the measurement of the head over the notch, would be
41517. The characteristic strength of concrete is defined as that compressive strength below which not more than
41518. Un-factored maximum bending moments at a section of a reinforced concrete beam resulting from a frame analysis are 50, 80, 120 and 180 kNm under dead, live, wind and earthquake loads respectively. The design moment (kNm) as per IS: 456-2000 for the limit state of collapse (flexure) is
41519. The microbial quality of treated piped water supplies is monitored by
41520. The 5-day BOD of a wastewater sample is obtained as 190 mg/l (with k = 0.01 h-1). The ultimate oxygen demand (mg/l) of the sample will be
41521. A tube well having a capacity of 4 m3/hour operates for 20 hours each day during the irrigation season. How much area can be commanded if the irrigation interval is 20 days and depth of irrigation is 7 cm ?
41522. In a reinforced concrete beam-column, the increase in the flexural strength along with the increase in the axial strength occurs
41523. The group efficiency of a pile group
41524. A wastewater sample contains 10-5.6 mmol/l of OH ions at 25° C. The pH of this sample is
41525. At a rated capacity of 44 Cumecs, a centrifugal pump develops 36 m of head when operating at 1450 rpm. Its specific speed is :
41526. Presence of ifluoride in water greater than permissible level of 1.5 mg/l causes
41527. The values of liquid limit and plasticity index for soils having common geological origin in a rectricted locality usually define
41528. M - θ relationship for a simply supported beam shown below is given by :
41529. The number of revolutions of a current meter in 50 seconds were found to be 12 and 30 corresponding to the velocities of 0.25 and 0.46 m/s respectively. What velocity (in m/s) would be indicated by 50 revolutions of that current meter in one minute ?
41530. A lysimeter is used to measure :
41531. In IS : 800 (1984) the permissible compressive stress in column is based on :
41532. Sewage treatment in an oxidation pond is accomplished primarily by :
41533. Presence of excess nitrates in river water indicates :
41534. Two steel plates each of width 150 mm and thickness 10 mm are connected with three 20 mm diameter rivets placed in a zig-zag pattern. The pitch of the rivets is 75 mm and gauge is 60 mm. If the allowable tensile stress is 150 MPa, the maximum tensile force that the joint can withstand is
41535. A single bay single storey portal frame has hinged left support and a fixed right support. It is loaded with uniformly distributed load on the beam. Which one of the following statements is true with regard to the deformation of the frame ?
41536. To have zero active pressure intensity at the tip of a wall in cohesive soil, one should apply a uniform surcharge intensity of
41537. The following characteristics pertain to the sand filters used in water industry. Filtration rate is 1 to 4 m3 (m2 day).Typical duration of operation in one run is 24 to 72 hours.Operating cost is low. Which of the above characteristics pertain to slow sand filters ?
41538. Effective length of a rafter member between two nodes at a distance L, perpendicular to the plane of the truss, is : .
41539. Consistency Index for a clayer soil is [LL = Liquid Limit, PL = Plastic Limit, PI = Plas-ticity Index, W - natural moisture content]
41540. The slope of the elastic curve at the free end of a cantilever beam of span L, and with fluxural rigidity EI, subjected to uniformly distributed load of intensity w is
41541. If duty (D) is 1428 hectares/cumec and base period (B) is 120 days for an irrigated crop, then delta (Δ) in meters is given by
41542. The repeating variables in dimensional analysis should :
41543. The minimum dissolved oxygen content (ppm) in a river necessary for the survival of aquatic life is
41544. Stopping sight distance is the minimum distance available on a highway which is the
41545. A body moving through still water at 6 m/sec produces a water velocity of 4 m/sec at a point 1 m ahead. The difference in pressure between the nose and the point 1 m ahead would be
41546. Critical factors for the activated sludge treatment process are
41547. MPN index is a measure of one of the following :
41548. One of the probable causes of rutting on flexible pavements is
41549. The basic assumption of plane sections normal to the neutral axis before bending, remaining plane and normal to the neutral axis after bending, leads to :
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